Electronic Control Infinity

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System Description .................................................28POWER SUPPLY AND GROUND CIRCUIT ....83ELECTRIC IGNITION SYSTEM .........................31

System Description .................................................31

AIR CONDITIONING CUT CONTROL ...............32Input/Output Signal Chart ........................................32System Description .................................................32

AUTOMATIC SPEED CONTROL DEVICE (ASCD) ...............................................................33

Diagnosis Procedure ...............................................83Ground Inspection ...................................................86

U1000, U1001 CAN COMM CIRCUIT ...............87Description ...............................................................87On Board Diagnosis Logic .......................................87DTC Confirmation Procedure ..................................87Diagnosis Procedure ...............................................87ENGINE

SECTION EC ECONTENTS

ENGINE CONTROL SYSTEM

VK56DE

BASIC INSPECTION .................................... 8DIAGNOSIS AND REPAIR WORKFLOW .......... 8

Trouble Diagnosis Introduction .................................8

INSPECTION AND ADJUSTMENT ....................13Basic Inspection ......................................................13Idle Speed and Ignition Timing Check ....................17Procedure After Replacing ECM .............................17VIN Registration ......................................................17Accelerator Pedal Released Position Learning .......18Throttle Valve Closed Position Learning .................18Idle Air Volume Learning .........................................18

FUNCTION DIAGNOSIS ..............................21ENGINE CONTROL SYSTEM ............................21

System Diagram ......................................................21Engine Control Component Parts Location .............22

MULTIPORT FUEL INJECTION SYSTEM .........28

EVAPORATIVE EMISSION SYSTEM ...............37Description ...............................................................37

INTAKE VALVE TIMING CONTROL ................40Description ...............................................................40

ON BOARD DIAGNOSTIC (OBD) SYSTEM ....41Introduction ..............................................................41Two Trip Detection Logic .........................................41Emission-related Diagnostic Information .................42Malfunction Indicator Lamp (MIL) ............................55OBD System Operation Chart .................................58CONSULT-III Function (ENGINE) ...........................63Generic Scan Tool (GST) Function .........................72

COMPONENT DIAGNOSIS .........................75TROUBLE DIAGNOSIS - SPECIFICATION VALUE ...............................................................75

Description ...............................................................75Testing Condition .....................................................75Inspection Procedure ...............................................75Diagnosis Procedure ...............................................76EC-1

PSystem Description .................................................33Component Description ...........................................34

CAN COMMUNICATION ....................................35System Description .................................................35

COOLING FAN CONTROL ................................36Description ..............................................................36

U1010 CONTROL UNIT (CAN) .........................88Description ...............................................................88On Board Diagnosis Logic .......................................88DTC Confirmation Procedure ..................................88Diagnosis Procedure ...............................................88

P0011, P0021 IVT CONTROL ...........................90On Board Diagnosis Logic .......................................90

DTC Confirmation Procedure ................................. 90Diagnosis Procedure .............................................. 91Component Inspection ............................................ 95

P0031, P0032, P0051, P0052 A/F SENSOR 1 HEATER ............................................................. 97

Description .............................................................. 97On Board Diagnosis Logic ...................................... 97DTC Confirmation Procedure ................................. 97Diagnosis Procedure .............................................. 97Component Inspection ............................................ 99

P0037, P0038, P0057, P0058 HO2S2 HEAT-ER .................................................................... 100

Description .............................................................100On Board Diagnosis Logic .....................................100DTC Confirmation Procedure ................................100Diagnosis Procedure .............................................101Component Inspection ...........................................102

P0075, P0081 IVT CONTROL SOLENOID VALVE ............................................................. 103

Component Description .........................................103On Board Diagnosis Logic .....................................103DTC Confirmation Procedure ................................103Diagnosis Procedure .............................................103Component Inspection ...........................................104

P0101 MAF SENSOR ...................................... 106Component Description .........................................106On Board Diagnosis Logic .....................................106DTC Confirmation Procedure ................................106Overall Function Check .........................................107Diagnosis Procedure .............................................108Component Inspection ...........................................110

P0102, P0103 MAF SENSOR .......................... 112Component Description .........................................112On Board Diagnosis Logic .....................................112DTC Confirmation Procedure ................................112Diagnosis Procedure .............................................113Component Inspection ...........................................114

P0112, P0113 IAT SENSOR ............................ 117Component Description .........................................117On Board Diagnosis Logic .....................................117DTC Confirmation Procedure ................................117Diagnosis Procedure .............................................117Component Inspection ...........................................119

P0117, P0118 ECT SENSOR .......................... 120Component Description .........................................120On Board Diagnosis Logic .....................................120DTC Confirmation Procedure ................................121Diagnosis Procedure .............................................121Component Inspection ...........................................122

P0122, P0123 TP SENSOR ............................. 124Component Description .........................................124

DTC Confirmation Procedure ................................ 124Diagnosis Procedure ............................................. 124Component Inspection .......................................... 127

P0125 ECT SENSOR .......................................128Component Description ........................................ 128On Board Diagnosis Logic .................................... 128DTC Confirmation Procedure ................................ 128Diagnosis Procedure ............................................. 129Component Inspection .......................................... 129

P0127 IAT SENSOR .........................................131Component Description ........................................ 131On Board Diagnosis Logic .................................... 131DTC Confirmation Procedure ................................ 131Diagnosis Procedure ............................................. 132Component Inspection .......................................... 132

P0128 THERMOSTAT FUNCTION ..................134On Board Diagnosis Logic .................................... 134DTC Confirmation Procedure ................................ 134Diagnosis Procedure ............................................. 134Component Inspection .......................................... 134

P0130, P0150 A/F SENSOR 1 .........................136Component Description ........................................ 136On Board Diagnosis Logic .................................... 136DTC Confirmation Procedure ................................ 136Overall Function Check ......................................... 137Diagnosis Procedure ............................................. 137

P0131, P0151 A/F SENSOR 1 .........................140Component Description ........................................ 140On Board Diagnosis Logic .................................... 140DTC Confirmation Procedure ................................ 140Diagnosis Procedure ............................................. 141



P0137, P0157 HO2S2 .......................................154Component Description ........................................ 154On Board Diagnosis Logic .................................... 154DTC Confirmation Procedure ................................ 154Overall Function Check ......................................... 155Diagnosis Procedure ............................................. 155Component Inspection .......................................... 157

P0138, P0158 HO2S2 .......................................159Component Description ........................................ 159EC-2

On Board Diagnosis Logic .....................................124 On Board Diagnosis Logic .................................... 159DTC Confirmation Procedure ................................ 159

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Overall Function Check ......................................... 160Diagnosis Procedure ............................................. 161Component Inspection .......................................... 164

P0139, P0159 HO2S2 ...................................... 166Component Description ......................................... 166On Board Diagnosis Logic .................................... 166DTC Confirmation Procedure ................................ 166Overall Function Check ......................................... 167Diagnosis Procedure ............................................. 167Component Inspection .......................................... 169

P0171, P0174 FUEL INJECTION SYSTEM FUNCTION ....................................................... 171

On Board Diagnosis Logic .................................... 171DTC Confirmation Procedure ................................ 171Diagnosis Procedure ............................................. 172

P0172, P0175 FUEL INJECTION SYSTEM FUNCTION ....................................................... 176


P0181 FTT SENSOR ........................................ 181Component Description ......................................... 181On Board Diagnosis Logic .................................... 181DTC Confirmation Procedure ................................ 181Diagnosis Procedure ............................................. 182Component Inspection .......................................... 183

P0182, P0183 FTT SENSOR ........................... 184Component Description ......................................... 184On Board Diagnosis Logic .................................... 184DTC Confirmation Procedure ................................ 184Diagnosis Procedure ............................................. 184Component Inspection .......................................... 186

P0222, P0223 APP SENSOR ........................... 187Component Description ......................................... 187On Board Diagnosis Logic .................................... 187DTC Confirmation Procedure ................................ 187Diagnosis Procedure ............................................. 187Component Inspection .......................................... 190

P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308 MISFIRE ....................... 191


P0327, P0328, P0332, P0333 KS .................... 197Component Description ......................................... 197On Board Diagnosis Logic .................................... 197DTC Confirmation Procedure ................................ 197Diagnosis Procedure ............................................. 197Component Inspection .......................................... 199

P0335 CKP SENSOR (POS) ............................ 200

DTC Confirmation Procedure ................................200Diagnosis Procedure .............................................201Component Inspection ...........................................202

P0340 CMP SENSOR (PHASE) ..................... 204Component Description .........................................204On Board Diagnosis Logic .....................................204DTC Confirmation Procedure ................................204Diagnosis Procedure .............................................205Component Inspection ...........................................206

P0420, P0430 THREE WAY CATALYST FUNCTION ...................................................... 208

On Board Diagnosis Logic .....................................208DTC Confirmation Procedure ................................208Overall Function Check .........................................209Diagnosis Procedure .............................................209

P0441 EVAP CONTROL SYSTEM ................. 212System Description ................................................212On Board Diagnosis Logic .....................................212DTC Confirmation Procedure ................................212Overall Function Check .........................................213Diagnosis Procedure .............................................213

P0442 EVAP CONTROL SYSTEM ................. 217On Board Diagnosis Logic .....................................217DTC Confirmation Procedure ................................217Diagnosis Procedure .............................................218Component Inspection ...........................................223

P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE ...................... 224


P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE ...... 229


P0447 EVAP CANISTER VENT CONTROL VALVE ............................................................. 232


P0448 EVAP CANISTER VENT CONTROL VALVE ............................................................. 236

Component Description .........................................236On Board Diagnosis Logic .....................................236EC-3

Component Description ......................................... 200On Board Diagnosis Logic .................................... 200 DTC Confirmation Procedure ................................236

Diagnosis Procedure .............................................237Component Inspection ...........................................238

P0451 EVAP CONTROL SYSTEM PRES-SURE SENSOR ............................................... 240






P0455 EVAP CONTROL SYSTEM .................. 252On Board Diagnosis Logic .....................................252DTC Confirmation Procedure ................................252Diagnosis Procedure .............................................253Component Inspection ...........................................257

P0456 EVAP CONTROL SYSTEM .................. 259On Board Diagnosis Logic .....................................259DTC Confirmation Procedure ................................260Overall Function Check .........................................260Diagnosis Procedure .............................................261Component Inspection ...........................................265

P0460 FUEL LEVEL SENSOR ........................ 267Component Description .........................................267On Board Diagnosis Logic .....................................267DTC Confirmation Procedure ................................267Diagnosis Procedure .............................................267

P0461 FUEL LEVEL SENSOR ........................ 269Component Description .........................................269On Board Diagnosis Logic .....................................269Overall Function Check .........................................269Diagnosis Procedure .............................................270

P0462, P0463 FUEL LEVEL SENSOR ........... 271Component Description .........................................271On Board Diagnosis Logic .....................................271DTC Confirmation Procedure ................................271Diagnosis Procedure .............................................271

P0500 VSS ....................................................... 273

DTC Confirmation Procedure ................................ 273Overall Function Check ......................................... 274Diagnosis Procedure ............................................. 274

P0506 ISC SYSTEM .........................................275Description ............................................................ 275On Board Diagnosis Logic .................................... 275DTC Confirmation Procedure ................................ 275Diagnosis Procedure ............................................. 275

P0507 ISC SYSTEM .........................................277Description ............................................................ 277On Board Diagnosis Logic .................................... 277DTC Confirmation Procedure ................................ 277Diagnosis Procedure ............................................. 277

P0550 PSP SENSOR .......................................279Component Description ........................................ 279On Board Diagnosis Logic .................................... 279DTC Confirmation Procedure ................................ 279Diagnosis Procedure ............................................. 279Component Inspection .......................................... 281

P0603 ECM POWER SUPPLY .........................282Component Description ........................................ 282On Board Diagnosis Logic .................................... 282DTC Confirmation Procedure ................................ 282Diagnosis Procedure ............................................. 282

P0605 ECM .......................................................284Component Description ........................................ 284On Board Diagnosis Logic .................................... 284DTC Confirmation Procedure ................................ 284Diagnosis Procedure ............................................. 285

P0643 SENSOR POWER SUPPLY ..................286On Board Diagnosis Logic .................................... 286DTC Confirmation Procedure ................................ 286Diagnosis Procedure ............................................. 286

P0850 PNP SWITCH ........................................289Component Description ........................................ 289On Board Diagnosis Logic .................................... 289DTC Confirmation Procedure ................................ 289Overall Function Check ......................................... 289Diagnosis Procedure ............................................. 290

P1140, P1145 IVT CONTROL POSITION SENSOR ...........................................................292

Component Description ........................................ 292On Board Diagnosis Logic .................................... 292DTC Confirmation Procedure ................................ 292Diagnosis Procedure ............................................. 292Component Inspection .......................................... 295

P1148, P1168 CLOSED LOOP CONTROL .....296On Board Diagnosis Logic .................................... 296

P1211 TCS CONTROL UNIT ...........................297Description ............................................................ 297EC-4

Description .............................................................273On Board Diagnosis Logic .....................................273 On Board Diagnosis Logic .................................... 297

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DTC Confirmation Procedure ................................ 297Diagnosis Procedure ............................................. 297

P1212 TCS COMMUNICATION LINE .............. 298Description ............................................................ 298On Board Diagnosis Logic .................................... 298DTC Confirmation Procedure ................................ 298Diagnosis Procedure ............................................. 298

P1217 ENGINE OVER TEMPERATURE ......... 299On Board Diagnosis Logic .................................... 299Overall Function Check ......................................... 299Diagnosis Procedure ............................................. 300Main 13 Causes of Overheating ............................ 301

P1225 TP SENSOR .......................................... 303Component Description ......................................... 303On Board Diagnosis Logic .................................... 303DTC Confirmation Procedure ................................ 303Diagnosis Procedure ............................................. 303

P1226 TP SENSOR .......................................... 305Component Description ......................................... 305On Board Diagnosis Logic .................................... 305DTC Confirmation Procedure ................................ 305Diagnosis Procedure ............................................. 305

P1421 COLD START CONTROL ..................... 307Description ............................................................ 307On Board Diagnosis Logic .................................... 307DTC Confirmation Procedure ................................ 307Diagnosis Procedure ............................................. 307

P1550 BATTERY CURRENT SENSOR ........... 309Component Description ......................................... 309On Board Diagnosis Logic .................................... 309DTC Confirmation Procedure ................................ 309Diagnosis Procedure ............................................. 309Component Inspection .......................................... 311

P1551, P1552 BATTERY CURRENT SEN-SOR .................................................................. 313

Component Description ......................................... 313On Board Diagnosis Logic .................................... 313DTC Confirmation Procedure ................................ 313Diagnosis Procedure ............................................. 313Component Inspection .......................................... 315

P1553 BATTERY CURRENT SENSOR ........... 317Component Description ......................................... 317On Board Diagnosis Logic .................................... 317DTC Confirmation Procedure ................................ 317Diagnosis Procedure ............................................. 317Component Inspection .......................................... 319

P1554 BATTERY CURRENT SENSOR ........... 321Component Description ......................................... 321On Board Diagnosis Logic .................................... 321Overall Function Check ......................................... 321

P1564 ICC STEERING SWITCH ..................... 325Component Description .........................................325On Board Diagnosis Logic .....................................325DTC Confirmation Procedure ................................325Diagnosis Procedure .............................................325Component Inspection ...........................................328

P1564 ASCD STEERING SWITCH ................. 329Component Description .........................................329On Board Diagnosis Logic .....................................329DTC Confirmation Procedure ................................329Diagnosis Procedure .............................................329Component Inspection ...........................................331

P1568 ICC FUNCTION .................................... 333On Board Diagnosis Logic .....................................333DTC Confirmation Procedure ................................333Diagnosis Procedure .............................................333

P1572 ICC BRAKE SWITCH .......................... 334Component Description .........................................334On Board Diagnosis Logic .....................................334DTC Confirmation Procedure ................................334Diagnosis Procedure .............................................335Component Inspection ...........................................339

P1572 ASCD BRAKE SWITCH ...................... 340Component Description .........................................340On Board Diagnosis Logic .....................................340DTC Confirmation Procedure ................................340Diagnosis Procedure .............................................341Component Inspection ...........................................344

P1574 ICC VEHICLE SPEED SENSOR ......... 345Component Description .........................................345On Board Diagnosis Logic .....................................345DTC Confirmation Procedure ................................345Diagnosis Procedure .............................................345

P1574 ASCD VEHICLE SPEED SENSOR ..... 347Component Description .........................................347On Board Diagnosis Logic .....................................347DTC Confirmation Procedure ................................347Diagnosis Procedure .............................................347

P1805 BRAKE SWITCH ................................. 349Description .............................................................349On Board Diagnosis Logic .....................................349DTC Confirmation Procedure ................................349Diagnosis Procedure .............................................349Component Inspection ...........................................351

P2100, P2103 THROTTLE CONTROL MO-TOR RELAY .................................................... 352

Component Description .........................................352On Board Diagnosis Logic .....................................352DTC Confirmation Procedure ................................352Diagnosis Procedure .............................................353EC-5

Diagnosis Procedure ............................................. 322Component Inspection .......................................... 323

P2101 ELECTRIC THROTTLE CONTROL FUNCTION ...................................................... 355


P2118 THROTTLE CONTROL MOTOR .......... 359Component Description .........................................359On Board Diagnosis Logic .....................................359DTC Confirmation Procedure ................................359Diagnosis Procedure .............................................359Component Inspection ...........................................360

P2119 ELECTRIC THROTTLE CONTROL ACTUATOR ..................................................... 361

Component Description .........................................361On Board Diagnosis Logic .....................................361DTC Confirmation Procedure ................................361Diagnosis Procedure .............................................362

P2122, P2123 APP SENSOR .......................... 363Component Description .........................................363On Board Diagnosis Logic .....................................363DTC Confirmation Procedure ................................363Diagnosis Procedure .............................................364Component Inspection ...........................................365

P2127, P2128 APP SENSOR .......................... 366Component Description .........................................366On Board Diagnosis Logic .....................................366DTC Confirmation Procedure ................................366Diagnosis Procedure .............................................366Component Inspection ...........................................369

P2135 TP SENSOR ......................................... 370Component Description .........................................370On Board Diagnosis Logic .....................................370DTC Confirmation Procedure ................................370Diagnosis Procedure .............................................370Component Inspection ...........................................373

P2138 APP SENSOR ...................................... 374Component Description .........................................374On Board Diagnosis Logic .....................................374DTC Confirmation Procedure ................................374Diagnosis Procedure .............................................375Component Inspection ...........................................377

P2A00, P2A03 A/F SENSOR 1 ....................... 378Component Description .........................................378On Board Diagnosis Logic .....................................378DTC Confirmation Procedure ................................378Diagnosis Procedure .............................................379

ASCD BRAKE SWITCH .................................. 383Component Description .........................................383Diagnosis Procedure .............................................383Component Inspection ...........................................386

Diagnosis Procedure ............................................. 387

COOLING FAN .................................................388Diagnosis Procedure ............................................. 388Component Inspection .......................................... 388

ELECTRICAL LOAD SIGNAL ..........................390Description ............................................................ 390Diagnosis Procedure ............................................. 390

FUEL INJECTOR ..............................................392Component Description ........................................ 392Diagnosis Procedure ............................................. 392Component Inspection .......................................... 394

FUEL PUMP .....................................................395Description ............................................................ 395Diagnosis Procedure ............................................. 395Component Inspection .......................................... 398

ICC BRAKE SWITCH .......................................399Component Description ........................................ 399Diagnosis Procedure ............................................. 399Component Inspection .......................................... 402

IGNITION SIGNAL ............................................404Component Description ........................................ 404Diagnosis Procedure ............................................. 404Component Inspection .......................................... 407

ON BOARD REFUELING VAPOR RECOV-ERY (ORVR) .....................................................409

System Description ............................................... 409Diagnosis Procedure ............................................. 409Component Inspection .......................................... 411

POSITIVE CRANKCASE VENTILATION .........414Description ............................................................ 414Component Inspection .......................................... 414

REFRIGERANT PRESSURE SENSOR ...........416Component Description ........................................ 416Diagnosis Procedure ............................................. 416

ECU DIAGNOSIS ......................................419ECM ..................................................................419

CONSULT-lll Reference Value in Data Monitor Mode ..................................................................... 419ECM Harness Connector Terminal Layout ........... 422ECM Terminal and Reference Value .................... 422Wiring Diagram - ENGINE CONTROL SYSTEM - . 432Fail-Safe Chart ...................................................... 451DTC Inspection Priority Chart ............................... 453DTC Index ............................................................. 454Emission-related Diagnostic Information .............. 458

SYMPTOM DIAGNOSIS ...........................473ENGINE CONTROL SYSTEM SYMPTOMS ....473EC-6

ASCD INDICATOR .......................................... 387Component Description .........................................387

Symptom Matrix Chart .......................................... 473

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NORMAL OPERATING CONDITION ............... 477Fuel Cut Control (at No Load and High Engine Speed) ................................................................... 477

PRECAUTION ............................................ 478PRECAUTIONS ................................................ 478

Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT PRE-TEN-SIONER" ............................................................... 478On Board Diagnosis (OBD) System of Engine and A/T ......................................................................... 478Precaution ............................................................. 478

PREPARATION ......................................... 482PREPARATION ................................................ 482

Special Service Tool ............................................. 482Commercial Service Tool ...................................... 483

ON-VEHICLE MAINTENANCE .................. 485FUEL PRESSURE ............................................ 485

Fuel Pressure Check ............................................. 485

EVAP LEAK CHECK ........................................ 487How to Detect Fuel Vapor Leakage ...................... 487

ON-VEHICLE REPAIR ............................... 489

EVAP CANISTER ............................................ 489Removal and Installation .......................................489Component Inspection ...........................................489

INTAKE VALVE TIMING CONTROL .............. 490Intake Valve Timing Control Solenoid Valve (LH) ..490Intake Valve Timing Control Solenoid Valve (RH) ..490Intake Valve Timing Control Position Sensor (LH) ..491Intake Valve Timing Control Position Sensor (RH) ..491Camshaft Position Sensor (PHASE) .....................491

SERVICE DATA AND SPECIFICATIONS (SDS) .......................................................... 493SERVICE DATA AND SPECIFICATIONS (SDS) ............................................................... 493

Fuel Pressure ........................................................493Idle Speed and Ignition Timing ..............................493Calculated Load Value ..........................................493Mass Air Flow Sensor ............................................493Intake Air Temperature Sensor .............................493Engine Coolant Temperature Sensor ....................493A/F Sensor 1 Heater ..............................................493Heated Oxygen sensor 2 Heater ...........................494Crankshaft Position Sensor (POS) ........................494Camshaft Position Sensor (PHASE) .....................494Throttle Control Motor ............................................494Fuel Injector ...........................................................494Fuel Pump .............................................................494EC-7

< BASIC INSPECTION > [VK56DE]DIAGNOSIS AND REPAIR WORKFLOW

BASIC INSPECTIONDIAGNOSIS AND REPAIR WORKFLOWTrouble Diagnosis Introduction INFOID:0000000001351337

INTRODUCTIONThe engine has an ECM to control major systems such as fuel con-trol, ignition control, idle air control system, etc. The ECM acceptsinput signals from sensors and instantly drives actuators. It is essen-tial that both input and output signals are proper and stable. At thesame time, it is important that there are no malfunctions such as vac-uum leaks, fouled spark plugs, or other malfunctions with the engine.

It is much more difficult to diagnose an incident that occurs intermit-tently rather than continuously. Most intermittent incidents arecaused by poor electric connections or improper wiring. In this case,careful checking of suspected circuits may help prevent the replace-ment of good parts.

A visual check only may not find the cause of the incidents. A roadtest with CONSULT-III (or GST) or a circuit tester connected shouldbe performed. Follow the Work Flow on "WORK FLOW" .Before undertaking actual checks, take a few minutes to talk with acustomer who approaches with a driveability complaint. The cus-tomer can supply good information about such incidents, especiallyintermittent ones. Find out what symptoms are present and underwhat conditions they occur. A Diagnostic Worksheet like the exampleon "Worksheet Sample" should be used.Start your diagnosis by looking for conventional malfunctions first.This will help troubleshoot driveability malfunctions on an electroni-cally controlled engine vehicle.WORK FLOW

MEF036D

SEF233G

SEF234GEC-8

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ODIAGNOSIS AND REPAIR WORKFLOW< BASIC INSPECTION > [VK56DE]

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Overall Sequence

Detailed Flow1.GET INFORMATION FOR SYMPTOMGet the detailed information from the customer about the symptom (the condition and the environment whenthe incident/malfunction occurred) using the "Worksheet Sample" .

PBIB3456EEC-9

>> GO TO 2.


2.CHECK DTC*11. Check DTC*1 .2. Perform the following procedure if DTC*1 is displayed.- Record DTC*1 and freeze frame data*2 . (Print them out with CONSULT-III or GST.)- Erase DTC*1 . (Refer to EC-454, "DTC Index" .)- Study the relationship between the cause detected by DTC*1 and the symptom described by the cus-

tomer. (Symptom Matrix Chart is useful. Refer to EC-473, "Symptom Matrix Chart" .)3. Check related service bulletins for information.Is any symptom described and any DTC detected?Symptom is described, DTC*1 is displayed>>GO TO 3.Symptom is described, DTC*1 is not displayed>>GO TO 4.Symptom is not described, DTC*1 is displayed>>GO TO 5.

3.CONFIRM THE SYMPTOMTry to confirm the symptom described by the customer (except MIL ON).DIAGNOSIS WORK SHEET is useful to verify the incident.Connect CONSULT-III to the vehicle and check real time diagnosis results.Verify relation between the symptom and the condition when the symptom is detected.

>> GO TO 5.4.CONFIRM THE SYMPTOMTry to confirm the symptom described by the customer.DIAGNOSIS WORK SHEET is useful to verify the incident.Connect CONSULT-III to the vehicle and check real time diagnosis results.Verify relation between the symptom and the condition when the symptom is detected.

>> GO TO 6.5.PERFORM DTC CONFIRMATION PROCEDUREPerform DTC Confirmation Procedure for the displayed DTC* , and then make sure that DTC*1 is detectedagain.If two or more DTCs*1 are detected, refer to EC-453, "DTC Inspection Priority Chart" and determine troublediagnosis order.NOTE: Freeze frame data*2 is useful if the DTC*1 is not detected. Perform Overall Function Check if DTC Confirmation Procedure is not included on Service Manual. This

simplified check procedure is an effective alternative though DTC*1 cannot be detected during this check.If the result of Overall Function Check is NG, it is the same as the detection of DTC*1 by DTC ConfirmationProcedure.

Is DTC*1 detected?Yes >> GO TO 10.No >> Check according to GI-38, "Intermittent Incident" .

6.PERFORM BASIC INSPECTIONPerform EC-13, "Basic Inspection" .

With CONSULT-III>>GO TO 7.Without CONSULT-III>>GO TO 9.

7.PERFORM SPEC IN DATA MONITOR MODE With CONSULT-III

Make sure that MAS A/F SE-B1, B/FUEL SCHDL, and A/F ALPHA-B1, A/F ALPHA-B2 are within the SPEC-10

value using CONSULT-III SPEC in DATA MONITOR mode. Refer to EC-75.

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ODIAGNOSIS AND REPAIR WORKFLOW< BASIC INSPECTION > [VK56DE]

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Are they within the SP value?Yes >> GO TO 9.No >> GO TO 8.

8.DETECT MALFUNCTIONING PART BY TROUBLE DIAGNOSIS - SPECIFICATION VALUEDetect malfunctioning part according to EC-76, "Diagnosis Procedure".Is malfunctioning part detected?Yes >> GO TO 11.No >> GO TO 9.

9.DETECT MALFUNCTIONING SYSTEM BY SYMPTOM MATRIX CHARTDetect malfunctioning system according to EC-473, "Symptom Matrix Chart" based on the confirmed symp-tom in step 4, and determine the trouble diagnosis order based on possible causes and symptom.

>> GO TO 10.10.DETECT MALFUNCTIONING PART BY DIAGNOSTIC PROCEDUREInspect according to Diagnostic Procedure of the system.NOTE:The Diagnostic Procedure in EC section described based on open circuit inspection. A short circuit inspectionis also required for the circuit check in the Diagnostic Procedure. For details, refer to Circuit Inspection in GI-34, "Work Flow".Is malfunctioning part detected?Yes >> GO TO 11.No >> Monitor input data from related sensors or check voltage of related ECM terminals using CON-

SULT-III. Refer to EC-422, "ECM Terminal and Reference Value", EC-419, "CONSULT-lll Refer-ence Value in Data Monitor Mode".

11.REPAIR OR REPLACE THE MALFUNCTIONING PART1. Repair or replace the malfunctioning part.2. Reconnect parts or connectors disconnected during Diagnostic Procedure again after repair and replace-

ment.3. Check DTC. If DTC is displayed, erase it, refer to EC-454, "DTC Index".

>> GO TO 12.12.FINAL CHECKWhen DTC was detected in step 2, perform DTC Confirmation Procedure or Overall Function Check again,and then make sure that the malfunction have been repaired securely.When symptom was described from the customer, refer to confirmed symptom in step 3 or 4, and make surethat the symptom is not detected.OK or NGNG (DTC*1 is detected)>>GO TO 10.NG (Symptom remains)>>GO TO 6.OK >> 1. Before returning the vehicle to the customer, make sure to erase unnecessary DTC*1 in ECM

and TCM (Transmission Control Module). (Refer to EC-454, "DTC Index" and TM-31, "OBD-II Diagnostic Trouble Code (DTC)".)

2. If the completion of SRT is needed, drive vehicle under the specific driving pattern. Refer toEC-454, "DTC Index".

3. INSPECTION END*1: Include 1st trip DTC.*2: Include 1st trip freeze frame data.DIAGNOSTIC WORKSHEETDescriptionEC-11


There are many operating conditions that lead to the malfunction ofengine components. A good grasp of such conditions can make trou-bleshooting faster and more accurate.In general, each customer feels differently about a incident. It isimportant to fully understand the symptoms or conditions for a cus-tomer complaint.Utilize a diagnostic worksheet like the one on the next page in orderto organize all the information for troubleshooting.Some conditions may cause the MIL to come on steady or blink andDTC to be detected. Examples: Vehicle ran out of fuel, which caused the engine to misfire. Fuel filler cap was left off or incorrectly screwed on, allowing fuel to

evaporate into the atmosphere.Worksheet Sample

SEF907L

MTBL0017EC-12

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OINSPECTION AND ADJUSTMENT< BASIC INSPECTION > [VK56DE]

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INSPECTION AND ADJUSTMENTBasic Inspection INFOID:00000000013513291.INSPECTION START1. Check service records for any recent repairs that may indicate a related malfunction, or a current need for

scheduled maintenance.2. Open engine hood and check the following:- Harness connectors for improper connections- Wiring harness for improper connections, pinches and cut- Vacuum hoses for splits, kinks and improper connections- Hoses and ducts for leaks- Air cleaner clogging- Gasket3. Confirm that electrical or mechanical loads are not applied.- Headlamp switch is OFF.- Air conditioner switch is OFF.- Rear window defogger switch is OFF.- Steering wheel is in the straight-ahead position, etc.4. Start engine and warm it up until engine coolant temperature

indicator points the middle of gauge.Ensure engine stays below 1,000 rpm.

5. Run engine at about 2,000 rpm for about 2 minutes under noload.

6. Make sure that no DTC is displayed with CONSULT-III or GST.OK or NGOK >> GO TO 3.NG >> GO TO 2.

2.REPAIR OR REPLACERepair or replace components as necessary according to corresponding Diagnostic Procedure.

>> GO TO 3.3.CHECK TARGET IDLE SPEED

With CONSULT-III1. Run engine at about 2,000 rpm for about 2 minutes under no load.

SEF983U

SEF976U

SEF977UEC-13

< BASIC INSPECTION > [VK56DE]INSPECTION AND ADJUSTMENT

2. Rev engine (2,000 to 3,000 rpm) two or three times under noload, then run engine at idle speed for about 1 minute.

3. Read idle speed in DATA MONITOR mode with CONSULT-III. Refer to EC-17, "Idle Speed and IgnitionTiming Check" .

Without CONSULT-III1. Run engine at about 2,000 rpm for about 2 minutes under no load.2. Rev engine (2,000 to 3,000 rpm) two or three times under no load, then run engine at idle speed for about

1 minute.3. Check idle speed.

Refer to EC-17, "Idle Speed and Ignition Timing Check" .

OK or NGOK >> GO TO 10.NG >> GO TO 4.

4.PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING1. Stop engine.2. Perform EC-18, "Accelerator Pedal Released Position Learning" .

>> GO TO 5.5.PERFORM THROTTLE VALVE CLOSED POSITION LEARNINGPerform EC-18, "Throttle Valve Closed Position Learning" .

>> GO TO 6.6.PERFORM IDLE AIR VOLUME LEARNINGRefer to EC-18, "Idle Air Volume Learning" .Is Idle Air Volume Learning carried out successfully?Yes or NoYes >> GO TO 7.No >> 1. Follow the instruction of Idle Air Volume Learning.

2. GO TO 4.7.CHECK TARGET IDLE SPEED AGAIN

With CONSULT-III1. Start engine and warm it up to normal operating temperature.2. Read idle speed in DATA MONITOR mode with CONSULT-III.


PBIA8513J

650 50 rpm (in P or N position)


650 50 rpm (in P or N position)EC-14

Without CONSULT-III

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1. Start engine and warm it up to normal operating temperature.2. Check idle speed.



8.DETECT MALFUNCTIONING PARTCheck the following. Check camshaft position sensor (PHASE) and circuit. Refer to EC-204 . Check crankshaft position sensor (POS) and circuit. Refer to EC-200 .OK or NGOK >> GO TO 9.NG >> 1. Repair or replace.

2. GO TO 4.9.CHECK ECM FUNCTION 1. Substitute another known-good ECM to check ECM function. (ECM may be the cause of an incident, but

this is a rare case.)2. Perform initialization of IVIS (NATS) system and registration of all IVIS (NATS) ignition key IDs. Refer to

SEC-11, "System Diagram".

>> GO TO 4.10.CHECK IGNITION TIMING1. Run engine at idle.2. Check ignition timing with a timing light.



11.PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING1. Stop engine.2. Perform EC-18, "Accelerator Pedal Released Position Learning" .

>> GO TO 12.12.PERFORM THROTTLE VALVE CLOSED POSITION LEARNINGPerform EC-18, "Throttle Valve Closed Position Learning" .

>> GO TO 13.13.PERFORM IDLE AIR VOLUME LEARNINGRefer to EC-18, "Idle Air Volume Learning" .Is Idle Air Volume Learning carried out successfully?Yes or NoYes >> GO TO 14.


15 5 BTDC (in P or N position)

BBIA0379EEC-15

No >> 1. Follow the instruction of Idle Air Volume Learning.


2. GO TO 4.14.CHECK TARGET IDLE SPEED AGAIN

With CONSULT-III1. Start engine and warm it up to normal operating temperature.2. Read idle speed in DATA MONITOR mode with CONSULT-III.


Without CONSULT-III1. Start engine and warm it up to normal operating temperature.2. Check idle speed.



15.CHECK IGNITION TIMING AGAIN1. Run engine at idle.2. Check ignition timing with a timing light.



16.CHECK TIMING CHAIN INSTALLATIONCheck timing chain installation. Refer to EM-43, "Removal and Installation".OK or NGOK >> GO TO 17.NG >> 1. Repair the timing chain installation.

2. GO TO 4.17.DETECT MALFUNCTIONING PARTCheck the following. Check camshaft position sensor (PHASE) and circuit. Refer to EC-204 . Check crankshaft position sensor (POS) and circuit. Refer to EC-200 .OK or NGOK >> GO TO 18.NG >> 1. Repair or replace.

2. GO TO 4.18.CHECK ECM FUNCTION 1. Substitute another known-good ECM to check ECM function. (ECM may be the cause of an incident, but

this is a rare case.)2. Perform initialization of IVIS (NATS) system and registration of all IVIS (NATS) ignition key IDs. Refer to

SEC-11, "System Diagram".

>> GO TO 4.



15 5 BTDC (in P or N position)

BBIA0379EEC-1619.INSPECTION END

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Did you replace ECM, referring this Basic Inspection procedure?Yes or NoYes >> 1. Perform EC-17, "VIN Registration" .

2. INSPECTION ENDNo >> INSPECTION END

Idle Speed and Ignition Timing Check INFOID:0000000001351330

IDLE SPEED With CONSULT-III

Check idle speed in DATA MONITOR mode with CONSULT-III. With GST

Check idle speed with GST.IGNITION TIMING1. Attach timing light to loop wire as shown.

2. Check ignition timing.

Procedure After Replacing ECM INFOID:0000000001351331When replacing ECM, the following procedure must be performed.1. Perform initialization of IVIS (NATS) system and registration of all IVIS (NATS) ignition key IDs.

Refer to SEC-11, "System Diagram".2. Perform EC-17, "VIN Registration".3. Perform EC-18, "Accelerator Pedal Released Position Learning".4. Perform EC-18, "Throttle Valve Closed Position Learning".5. Perform EC-18, "Idle Air Volume Learning".VIN Registration INFOID:0000000001351332

DESCRIPTIONVIN Registration is an operation to registering VIN in ECM. It must be performed each time ECM is replaced.NOTE:Accurate VIN which is registered in ECM may be required for Inspection & Maintenance (I/M).

BBIA0377E

BBIA0379EEC-17

OPERATION PROCEDURE


With CONSULT-III1. Check the VIN of the vehicle and note it. Refer to GI-20, "Model Variation".2. Turn ignition switch ON and engine stopped.3. Select VIN REGISTRATION in WORK SUPPORT mode.4. Follow the instruction of CONSULT-III display.Accelerator Pedal Released Position Learning INFOID:0000000001351333

DESCRIPTIONAccelerator Pedal Released Position Learning is an operation to learn the fully released position of the accel-erator pedal by monitoring the accelerator pedal position sensor output signal. It must be performed each timeharness connector of accelerator pedal position sensor or ECM is disconnected.OPERATION PROCEDURE1. Make sure that accelerator pedal is fully released.2. Turn ignition switch ON and wait at least 2 seconds.3. Turn ignition switch OFF and wait at least 10 seconds.4. Turn ignition switch ON and wait at least 2 seconds.5. Turn ignition switch OFF and wait at least 10 seconds.Throttle Valve Closed Position Learning INFOID:0000000001351334

DESCRIPTIONThrottle Valve Closed Position Learning is an operation to learn the fully closed position of the throttle valve bymonitoring the throttle position sensor output signal. It must be performed each time harness connector ofelectric throttle control actuator or ECM is disconnected.OPERATION PROCEDURE1. Make sure that accelerator pedal is fully released.2. Turn ignition switch ON.3. Turn ignition switch OFF wait at least 10 seconds.

Make sure that throttle valve moves during above 10 seconds by confirming the operating sound.Idle Air Volume Learning INFOID:0000000001351335

DESCRIPTIONIdle Air Volume Learning is an operation to learn the idle air volume that keeps each engine within the specificrange. It must be performed under any of the following conditions: Each time electric throttle control actuator or ECM is replaced. Idle speed or ignition timing is out of specification.PREPARATIONBefore performing Idle Air Volume Learning, make sure that all of the following conditions are satisfied.Learning will be cancelled if any of the following conditions are missed for even a moment. Battery voltage: More than 12.9V (At idle) Engine coolant temperature: 70 - 100C (158 - 212F) Park/neutral position (PNP) switch: ON Electric load switch: OFF

(Air conditioner, headlamp, rear window defogger)On vehicles equipped with daytime light systems, if the parking brake is applied before the engine isstart the headlamp will not be illuminated.

Steering wheel: Neutral (Straight-ahead position) Vehicle speed: Stopped Transmission: Warmed-up- With CONSULT-III: Drive vehicle until ATF TEMP SE 1 in DATA MONITOR mode of A/T system indi-

cates less than 0.9V.- Without CONSULT-III: Drive vehicle for 10 minutes.EC-18OPERATION PROCEDURE

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With CONSULT-III1. Perform EC-18, "Accelerator Pedal Released Position Learning" .2. Perform EC-18, "Throttle Valve Closed Position Learning" .3. Start engine and warm it up to normal operating temperature.4. Check that all items listed under the topic PREPARATION (previously mentioned) are in good order.5. Select IDLE AIR VOL LEARN in WORK SUPPORT mode.

6. Touch START and wait 20 seconds.

7. Make sure that CMPLT is displayed on CONSULT-III screen. If CMPLT is not displayed, Idle Air Vol-ume Learning will not be carried out successfully. In this case, find the cause of the incident by referring tothe DIAGNOSTIC PROCEDURE below.

8. Rev up the engine two or three times and make sure that idle speed and ignition timing are within thespecifications.

Without CONSULT-IIINOTE: It is better to count the time accurately with a clock. It is impossible to switch the diagnostic mode when an accelerator pedal position sensor circuit has

a malfunction.1. Perform EC-18, "Accelerator Pedal Released Position Learning" .2. Perform EC-18, "Throttle Valve Closed Position Learning" .3. Start engine and warm it up to normal operating temperature.4. Check that all items listed under the topic PREPARATION (previously mentioned) are in good order.5. Turn ignition switch OFF and wait at least 10 seconds.6. Confirm that accelerator pedal is fully released, turn ignition switch ON and wait 3 seconds.7. Repeat the following procedure quickly five times within 5 seconds.a. Fully depress the accelerator pedal.b. Fully release the accelerator pedal.8. Wait 7 seconds, fully depress the accelerator pedal and keep it for approx. 20 seconds until the MIL stops

blinking and turned ON.9. Fully release the accelerator pedal within 3 seconds after the MIL turned ON.10. Start engine and let it idle.11. Wait 20 seconds.

12. Rev up the engine two or three times and make sure that idle speed and ignition timing are within thespecifications.

ITEM SPECIFICATIONIdle speed 650 50 rpm (in P or N position)Ignition timing 15 5 BTDC (in P or N position)

SEC897CEC-19


13. If idle speed and ignition timing are not within the specification, Idle Air Volume Learning will not be carriedout successfully. In this case, find the cause of the incident by referring to the DIAGNOSTIC PROCE-DURE below.

DIAGNOSTIC PROCEDUREIf idle air volume learning cannot be performed successfully, proceed as follows:1. Check that throttle valve is fully closed.2. Check PCV valve operation.3. Check that downstream of throttle valve is free from air leakage.4. When the above three items check out OK, engine component parts and their installation condi-

tion are questionable. Check and eliminate the cause of the incident. It is useful to perform EC-75 .

5. If any of the following conditions occur after the engine has started, eliminate the cause of theincident and perform Idle Air Volume Learning all over again: Engine stalls. Erroneous idle.

ITEM SPECIFICATIONIdle speed 650 50 rpm (in P or N position)Ignition timing 15 5 BTDC (in P or N position)EC-20

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OENGINE CONTROL SYSTEM< FUNCTION DIAGNOSIS > [VK56DE]

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FUNCTION DIAGNOSISENGINE CONTROL SYSTEMSystem Diagram INFOID:0000000001351344

PBIB3438EEC-21

< FUNCTION DIAGNOSIS > [VK56DE]ENGINE CONTROL SYSTEM

Engine Control Component Parts Location INFOID:0000000001351343

1. ECM 2. Battery current sensor 3. Power steering pressure sensor4. Ignition coil (with power transistor)

and spark plug (bank 2)5. Refrigerant pressure sensor 6. Intake valve timing control position

sensor (bank 2)7. Intake valve timing control solenoid

valve (bank 2)8. Engine coolant temperature sensor 9. Electric throttle control actuator

10. Intake valve timing control position sensor (bank 1)

11. Intake valve timing control solenoid valve (bank 1)

12. Cooling fan motor

13. Camshaft position sensor (PHASE) 14. Ignition coil (with power transistor) and spark plug (bank 1)

15. Mass air flow sensor (with intake air temperature sensor)

16. A/F sensor 1 (bank 1) 17. EVAP service port 18. Fuel injector (bank 1)19. Knock sensor (bank 1) 20. EVAP canister purge volume control

solenoid valve21. Knock sensor (bank 2)

22. Fuel injector (bank 2) 23. A/F sensor 1 (bank 2) 24. IPDM E/R

BBIA0743EEC-22

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1. Body ground (view with battery re-moved)

2. Body ground (view with battery re-moved)

3. Body ground

4. No. 1 ignition coil 5. Engine ground 6. Mass air flow sensor (with intake air temperature sensor)

7. IPDM E/R 8. Battery 9. Radiator hose

BBIA0778EEC-23


10. Camshaft position sensor (PHASE) 11. Electric throttle control actuator (view with intake air duct removed)

12. Cooling fan motor harness connec-tor

: Vehicle front

BBIA0739EEC-24

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1. EVAP canister purge volume control solenoid valve (view with engine cover removed)

2. EVAP service port (view with engine cover removed)

3. Crankshaft position sensor (POS) (view from under the vehicle)

4. Engine oil pan (view from under the vehicle)

5. Condenser-1 6. Brake fluid reservoir

7. EVAP canister (view with fuel tank removed)

8. EVAP control system pressure sen-sor (view with fuel tank removed)

9. EVAP canister vent control valve (view with fuel tank removed)

10. Rear suspension member (view with fuel tank removed)

11. Refrigerant pressure sensor (view with front grille removed)

12. Intake valve timing control position sensor (bank 2) (view with engine cover and intake air duct removed)

13. Intake valve timing control position sensor (bank 1) (view with engine cover and intake air duct removed)

14. Intake valve timing control solenoid valve (bank 2) (view with engine cov-er and intake air duct removed)

15. Drive belt (view with engine cover and intake air duct removed)

16. Radiator hose (view with engine cov-er and intake air duct removed)

17. Intake valve timing control solenoid valve (bank 1) (view with engine cov-er and intake air duct removed)

: Vehicle frontEC-25BBIA0774E


1. Knock sensor (bank 1) (view with en-gine removed)

2. Knock sensor (bank 2) (view with en-gine removed)

3. Battery current sensor

4. Power steering pressure sensor 5. Power steering fluid reservoir 6. Intake manifold7. Engine coolant temperature sensor 8. Ignition coils (with power transistor) 9. Ignition coil (with power transistor)10. Injector harness connectors (bank 2) 11. Injector harness connectors (bank 1)

: Vehicle frontEC-26

BBIA0384E

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PBIB2639EEC-27

< FUNCTION DIAGNOSIS > [VK56DE]MULTIPORT FUEL INJECTION SYSTEM

MULTIPORT FUEL INJECTION SYSTEMSystem Description INFOID:0000000001351227

INPUT/OUTPUT SIGNAL CHART

*1: This sensor is not used to control the engine system. This is used only for the on board diagnosis.*2: This signal is sent to the ECM through CAN communication line.*3: ECM determines the start signal status by the signals of engine speed and battery voltage.

SYSTEM DESCRIPTIONThe amount of fuel injected from the fuel injector is determined by the ECM. The ECM controls the length oftime the valve remains open (injection pulse duration). The amount of fuel injected is a program value in theECM memory. The program value is preset by engine operating conditions. These conditions are determinedby input signals (for engine speed and intake air) from both the crankshaft position sensor and the mass airflow sensor.VARIOUS FUEL INJECTION INCREASE/DECREASE COMPENSATIONIn addition, the amount of fuel injected is compensated to improve engine performance under various operat-ing conditions as listed below.

During warm-up When starting the engine During acceleration Hot-engine operation When selector lever is changed from N to D High-load, high-speed operation

During deceleration During high engine speed operation

Sensor Input signal to ECM ECM function ActuatorCrankshaft position sensor (POS) Engine speed*3

Piston position

Fuel injection & mixture ratio control

Fuel injector

Camshaft position sensor (PHASE)Mass air flow sensor Amount of intake air

Engine coolant temperature sensor Engine coolant temperatureAir fuel ratio (A/F) sensor 1 Density of oxygen in exhaust gasThrottle position sensor Throttle positionAccelerator pedal position sensor Accelerator pedal positionPark/neutral position (PNP) switch Gear positionKnock sensor Engine knocking condition

Battery Battery voltage*3

Power steering pressure sensor Power steering operation

Heated oxygen sensor 2*1 Density of oxygen in exhaust gas

ABS actuator and electric unit (control unit) VDC/TCS operation command*2

Air conditioner switch Air conditioner operation*2

Wheel sensor Vehicle speed*2EC-28

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OMULTIPORT FUEL INJECTION SYSTEM< FUNCTION DIAGNOSIS > [VK56DE]

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MIXTURE RATIO FEEDBACK CONTROL (CLOSED LOOP CONTROL)

The mixture ratio feedback system provides the best air-fuel mixture ratio for driveability and emission control.The three way catalyst (manifold) can then better reduce CO, HC and NOx emissions. This system uses airfuel ratio (A/F) sensor 1 in the exhaust manifold to monitor whether the engine operation is rich or lean. TheECM adjusts the injection pulse width according to the sensor voltage signal. For more information about airfuel ratio (A/F) sensor 1, refer to EC-136. This maintains the mixture ratio within the range of stoichiometric(ideal air-fuel mixture).This stage is referred to as the closed loop control condition.Heated oxygen sensor 2 is located downstream of the three way catalyst (manifold). Even if the switchingcharacteristics of air fuel ratio (A/F) sensor 1 shift, the air-fuel ratio is controlled to stoichiometric by the signalfrom heated oxygen sensor 2.Open Loop ControlThe open loop system condition refers to when the ECM detects any of the following conditions. Feedbackcontrol stops in order to maintain stabilized fuel combustion. Deceleration and acceleration High-load, high-speed operation Malfunction of A/F sensor 1 or its circuit Insufficient activation of A/F sensor 1 at low engine coolant temperature High engine coolant temperature During warm-up After shifting from N to D When starting the engineMIXTURE RATIO SELF-LEARNING CONTROLThe mixture ratio feedback control system monitors the mixture ratio signal transmitted from A/F sensor 1.This feedback signal is then sent to the ECM. The ECM controls the basic mixture ratio as close to the theoret-ical mixture ratio as possible. However, the basic mixture ratio is not necessarily controlled as originallydesigned. Both manufacturing differences (i.e., mass air flow sensor hot wire) and characteristic changes dur-ing operation (i.e., injector clogging) directly affect mixture ratio.Accordingly, the difference between the basic and theoretical mixture ratios is monitored in this system. This isthen computed in terms of injection pulse duration to automatically compensate for the difference betweenthe two ratios.Fuel trim refers to the feedback compensation value compared against the basic injection duration. Fuel trimincludes short term fuel trim and long term fuel trim.Short term fuel trim is the short-term fuel compensation used to maintain the mixture ratio at its theoreticalvalue. The signal from A/F sensor 1 indicates whether the mixture ratio is RICH or LEAN compared to the the-oretical value. The signal then triggers a reduction in fuel volume if the mixture ratio is rich, and an increase infuel volume if it is lean.Long term fuel trim is overall fuel compensation carried out long-term to compensate for continual deviationof the short term fuel trim from the central value. Such deviation will occur due to individual engine differences,wear over time and changes in the usage environment.

PBIB3020EEC-29

< FUNCTION DIAGNOSIS > [VK56DE]MULTIPORT FUEL INJECTION SYSTEM

FUEL INJECTION TIMING

Two types of systems are used.Sequential Multiport Fuel Injection SystemFuel is injected into each cylinder during each engine cycle according to the firing order. This system is usedwhen the engine is running.Simultaneous Multiport Fuel Injection SystemFuel is injected simultaneously into all eight cylinders twice each engine cycle. In other words, pulse signals ofthe same width are simultaneously transmitted from the ECM.The eight fuel injectors will then receive the signals two times for each engine cycle.This system is used when the engine is being started and/or if the fail-safe system (CPU) is operating.FUEL SHUT-OFFFuel to each cylinder is cut off during deceleration, operation of the engine at excessively high speeds or oper-ation of the vehicle at excessively high speed.

PBIB0122EEC-30

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OELECTRIC IGNITION SYSTEM< FUNCTION DIAGNOSIS > [VK56DE]

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ELECTRIC IGNITION SYSTEMSystem Description INFOID:0000000001351228


*1: This signal is sent to the ECM through CAN communication line.*2: ECM determines the start signal status by the signals of engine speed and battery voltage.

SYSTEM DESCRIPTIONFiring order: 1 - 8 - 7 - 3 - 6 - 5 - 4 -2The ignition timing is controlled by the ECM to maintain the best air-fuel ratio for every running condition of theengine. The ignition timing data is stored in the ECM.The ECM receives information such as the injection pulse width and camshaft position sensor signal. Comput-ing this information, ignition signals are transmitted to the power transistor.During the following conditions, the ignition timing is revised by the ECM according to the other data stored inthe ECM. At starting During warm-up At idle At low battery voltage During accelerationThe knock sensor retard system is designed only for emergencies. The basic ignition timing is programmedwithin the anti-knocking zone, if recommended fuel is used under dry conditions. The retard system does notoperate under normal driving conditions. If engine knocking occurs, the knock sensor monitors the condition.The signal is transmitted to the ECM. The ECM retards the ignition timing to eliminate the knocking condition.

Sensor Input signal to ECM ECM function ActuatorCrankshaft position sensor (POS) Engine speed*2

Piston position

Ignition timing control Power transistor

Camshaft position sensor (PHASE)Mass air flow sensor Amount of intake air

Engine coolant temperature sensor Engine coolant temperatureThrottle position sensor Throttle positionAccelerator pedal position sensor Accelerator pedal positionKnock sensor Engine knockingPark/neutral position (PNP) switch Gear positionBattery Battery voltage*2


< FUNCTION DIAGNOSIS > [VK56DE]AIR CONDITIONING CUT CONTROL

AIR CONDITIONING CUT CONTROLInput/Output Signal Chart INFOID:0000000001351236

*1: This signal is sent to the ECM through CAN communication line.*2: ECM determines the start signal status by the signals of engine speed and battery voltage.

System Description INFOID:0000000001351237This system improves engine operation when the air conditioner is used.Under the following conditions, the air conditioner is turned OFF. When the accelerator pedal is fully depressed. When cranking the engine. At high engine speeds. When the engine coolant temperature becomes excessively high. When operating power steering during low engine speed or low vehicle speed. When engine speed is excessively low. When refrigerant pressure is excessively low or high.

Sensor Input Signal to ECM ECM function Actuator

Air conditioner switch Air conditioner ON signal*1

Air conditioner cut control Air conditioner relay

Accelerator pedal position sensor Accelerator pedal positionCrankshaft position sensor (POS)Camshaft position sensor (PHASE) Engine speed*2

Engine coolant temperature sensor Engine coolant temperature


Refrigerant pressure sensor Refrigerant pressurePower steering pressure sensor Power steering operation


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OAUTOMATIC SPEED CONTROL DEVICE (ASCD)< FUNCTION DIAGNOSIS > [VK56DE]

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AUTOMATIC SPEED CONTROL DEVICE (ASCD)System Description INFOID:0000000001351238


*: This signal is sent to the ECM through CAN communication line

BASIC ASCD SYSTEMRefer to Owner's Manual for ASCD operating instructions.Automatic Speed Control Device (ASCD) allows a driver to keep vehicle at predetermined constant speedwithout depressing accelerator pedal. Driver can set vehicle speed in advance between approximately 40 km/h (25 MPH) and 144 km/h (89 MPH).ECM controls throttle angle of electric throttle control actuator to regulate engine speed.Operation status of ASCD is indicated by CRUISE indicator and SET indicator in combination meter. If anymalfunction occurs in ASCD system, it automatically deactivates control.NOTE:Always drive vehicle in safe manner according to traffic conditions and obey all traffic laws.SET OPERATIONPress MAIN switch. (The CRUISE indicator in combination meter illuminates.)When vehicle speed reaches a desired speed between approximately 40 km/h (25 MPH) and 144 km/h (89MPH), press SET/COAST switch. (Then SET indicator in combination meter illuminates.)ACCELERATE OPERATIONIf the RESUME/ACCELERATE switch is pressed during cruise control driving, increase the vehicle speed untilthe switch is released or vehicle speed reaches maximum speed controlled by the system.And then ASCD will keep the new set speed.CANCEL OPERATIONWhen any of following conditions exist, cruise operation will be canceled. CANCEL switch is pressed More than 2 switches at ASCD steering switch are pressed at the same time (Set speed will be cleared) Brake pedal is depressed Selector lever is changed to N, P, R position Vehicle speed decreased to 13 km/h (8 MPH) lower than the set speed VDC system is operatedWhen the ECM detects any of the following conditions, the ECM will cancel the cruise operation and informthe driver by blinking indicator lamp. Engine coolant temperature is slightly higher than the normal operating temperature, CRUISE lamp may

blink slowly.When the engine coolant temperature decreases to the normal operating temperature, CRUISE lamp willstop blinking and the cruise operation will be able to work by pressing SET/COAST switch or RESUME/ACCELERATE switch.

Malfunction for some self-diagnoses regarding ASCD control: SET lamp will blink quickly.If MAIN switch is turned to OFF during ASCD is activated, all of ASCD operations will be canceled and vehiclespeed memory will be erased.COAST OPERATIONWhen the SET/COAST switch is pressed during cruise control driving, decrease vehicle set speed until theswitch is released. And then ASCD will keep the new set speed.

Sensor Input signal to ECM ECM function ActuatorASCD brake switch Brake pedal operation

ASCD vehicle speed control Electric throttle control actuator

Stop lamp switch Brake pedal operationASCD steering switch ASCD steering switch operationPark/neutral position (PNP) switch Gear positionWheel sensor Vehicle speed*TCM Powertrain revolution*EC-33RESUME OPERATION

< FUNCTION DIAGNOSIS > [VK56DE]AUTOMATIC SPEED CONTROL DEVICE (ASCD)

When the RESUME/ACCELERATE switch is pressed after cancel operation other than pressing MAIN switchis performed, vehicle speed will return to last set speed. To resume vehicle set speed, vehicle condition mustmeet following conditions. Brake pedal is released A/T selector lever is in other than P and N positions Vehicle speed is greater than 40 km/h (25 MPH) and less than 144 km/h (89 MPH)Component Description INFOID:0000000001351239

ASCD STEERING SWITCHRefer to EC-329.ASCD BRAKE SWITCHRefer to EC-340, and EC-383.STOP LAMP SWITCHRefer to EC-340, EC-349 and EC-383.ELECTRIC THROTTLE CONTROL ACTUATOR Refer to EC-352, EC-355, EC-359 and EC-361.ASCD INDICATORRefer to EC-387.EC-34

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OCAN COMMUNICATION< FUNCTION DIAGNOSIS > [VK56DE]

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CAN COMMUNICATIONSystem Description INFOID:0000000001351240CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-tiplex communication line with high data communication speed and excellent error detection ability. Many elec-tronic control units are equipped onto a vehicle, and each control unit shares information and links with othercontrol units during operation (not independent). In CAN communication, control units are connected with 2communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring.Each control unit transmits/receives data but selectively reads required data only.Refer to LAN-44, "CAN System Specification Chart", about CAN communication for detail.EC-35

< FUNCTION DIAGNOSIS > [VK56DE]COOLING FAN CONTROL

COOLING FAN CONTROLDescription INFOID:0000000001351873

SYSTEM DESCRIPTIONCooling Fan Control

*1: The ECM determines the start signal status by the signals of engine speed and battery voltage.*2: This signal is sent to ECM through CAN communication line.The ECM controls the cooling fan corresponding to the vehicle speed, engine coolant temperature, refrigerantpressure, and air conditioner ON signal. The control system has 2-step control [HI/OFF].Cooling Fan Operation

Sensor Input signal to ECM ECM function ActuatorCrankshaft position sensor (POS)Camshaft position sensor (PHASE) Engine speed*1

Cooling fan control

IPDM E/R(Cooling fan relay)


Wheel sensor Vehicle speed*2

Engine coolant temperature sensor Engine coolant temperature

Air conditioner switch Air conditioner ON signal*2

Refrigerant pressure sensor Refrigerant pressure

PBIB2060EEC-36

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OEVAPORATIVE EMISSION SYSTEM< FUNCTION DIAGNOSIS > [VK56DE]

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EVAPORATIVE EMISSION SYSTEMDescription INFOID:0000000001351241

SYSTEM DESCRIPTION

The evaporative emission system is used to reduce hydrocarbons emitted into the atmosphere from the fuelsystem. This reduction of hydrocarbons is accomplished by activated charcoals in the EVAP canister.The fuel vapor in the sealed fuel tank is led into the EVAP canister which contains activated carbon and thevapor is stored there when the engine is not operating or when refueling to the fuel tank.The vapor in the EVAP canister is purged by the air through the purge line to the intake manifold when theengine is operating. EVAP canister purge volume control solenoid valve is controlled by ECM. When theengine operates, the flow rate of vapor controlled by EVAP canister purge volume control solenoid valve isproportionally regulated as the air flow increases.EVAP canister purge volume control solenoid valve also shuts off the vapor purge line during decelerating andidling.

PBIB1631EEC-37

< FUNCTION DIAGNOSIS > [VK56DE]EVAPORATIVE EMISSION SYSTEM

EVAPORATIVE EMISSION LINE DRAWING

PBIB2053EEC-38

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OEVAPORATIVE EMISSION SYSTEM< FUNCTION DIAGNOSIS > [VK56DE]

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BBIA0444EEC-39

< FUNCTION DIAGNOSIS > [VK56DE]INTAKE VALVE TIMING CONTROL

INTAKE VALVE TIMING CONTROLDescription INFOID:0000000001351376

SYSTEM DESCRIPTION

*: This signal is sent to the ECM through CAN communication line

This mechanism hydraulically controls cam phases continuously with the fixed operating angle of the intakevalve.The ECM receives signals such as crankshaft position, camshaft position, engine speed, and engine coolanttemperature. Then, the ECM sends ON/OFF pulse duty signals to the intake valve timing (IVT) control sole-noid valve depending on driving status. This makes it possible to control the shut/open timing of the intakevalve to increase engine torque in low/mid speed range and output in high-speed range.

Sensor Input signal to ECM function ECM ActuatorCrankshaft position sensor (POS)Camshaft position sensor (PHASE) Engine speed

Intake valve timing control

Intake valve timing control solenoid valve

Intake valve timing control position sensor Intake valve timing signalEngine coolant temperature sensor Engine coolant temperatureWheel sensor Vehicle speed*

PBIB3276EEC-40

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OON BOARD DIAGNOSTIC (OBD) SYSTEM< FUNCTION DIAGNOSIS > [VK56DE]

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ON BOARD DIAGNOSTIC (OBD) SYSTEMIntroduction INFOID:0000000001351323The ECM has an on board diagnostic system, which detects malfunctions related to engine sensors or actua-tors. The ECM also records various emission-related diagnostic information including:

The above information can be checked using procedures listed in the table below.: Applicable : Not applicable

*: When DTC and 1st trip DTC simultaneously appear on the display, they cannot be clearly distinguished from each other.The malfunction indicator lamp (MIL) on the instrument panel lights up when the same malfunction is detectedin two consecutive trips (Two trip detection logic), or when the ECM enters fail-safe mode. (Refer to EC-451,"Fail-Safe Chart".)Two Trip Detection Logic INFOID:0000000001351324When a malfunction is detected for the first time, 1st trip DTC and 1st trip Freeze Frame data are stored in theECM memory. The MIL will not light up at this stage. If the same malfunction is detected again during the next drive, the DTC and Freeze Frame data are stored inthe ECM memory, and the MIL lights up. The MIL lights up at the same time when the DTC is stored. The trip in the Two Trip Detection Logic means a driving mode in which self-diagnosis is performedduring vehicle operation. Specific on board diagnostic items will cause the ECM to light up or blink the MIL,and store DTC and Freeze Frame data, even in the 1st trip, as shown below.

: Applicable : Not applicable

When there is an open circuit on MIL circuit, the ECM cannot warn the driver by lighting up MIL when there ismalfunction on engine control system.

Emission-related diagnostic information Diagnostic serviceDiagnostic Trouble Code (DTC) Service $03 of SAE J1979Freeze Frame data Service $02 of SAE J1979System Readiness Test (SRT) code Service $01 of SAE J19791st Trip Diagnostic Trouble Code (1st Trip DTC) Service $07 of SAE J19791st Trip Freeze Frame dataTest values and Test limits Service $06 of SAE J1979Calibration ID Service $09 of SAE J1979

DTC 1st trip DTC Freeze Frame data1st trip Freeze

Frame data SRT code SRT status Test value

CONSULT-III GST ECM *

Items

MIL DTC 1st trip DTC1st trip 2nd trip

1st trip displaying

2nd trip displaying

1st trip displaying

2nd trip display-

ingBlinkingLighting

up BlinkingLighting

upMisfire (Possible three way catalyst damage) DTC: P0300 - P0308 is being detected

Misfire (Possible three way catalyst damage) DTC: P0300 - P0308 is being detected

One trip detection diagnoses (Re-fer to EC-454, "DTC Index".)

Except above EC-41

< FUNCTION DIAGNOSIS > [VK56DE]ON BOARD DIAGNOSTIC (OBD) SYSTEM

Therefore, when electrical controlled throttle and part of ECM related diagnoses are continuously detected asNG f

Date post:	08-Nov-2015
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