ec

ENGINE CONTROL SYSTEM

SECTIONECCONTENTS

OUTLINE/PREPARATION ...............................................2Outline..........................................................................2Special Service Tools ..................................................2

QR20DE

SYSTEM OUTLINE ..........................................................3Outline..........................................................................3System Diagram ..........................................................4Control Items, Sensors and Actuators.........................5

FAIL-SAFE FUNCTION ...................................................6Fail-safe Function ........................................................6

SELF-DIAGNOSIS FUNCTION .......................................7Outline..........................................................................7Self-diagnosis Operation Procedure............................7Malfunction Indicator Lamp (MIL) Indication ...............8Self-diagnosis Display Items .......................................9Erasing Self-diagnosis Results..................................11

CONSULT-II ...................................................................12Outline........................................................................12Work Support Mode...................................................13Self-diagnostic Results Mode....................................13Data Monitor Mode....................................................16Data Monitor Mode (SPEC).......................................17Active Test Mode .......................................................18ECM Part Number Mode ...........................................18

INSPECTION OF IDLE SPEED, IGNITION TIMING,AND AIR/FUEL RATIO ..................................................19

Idle Speed Specification (After warming-up).............19Idle Speed Inspection ................................................19Ignition Timing Inspection ..........................................19CO/HC Concentration Inspection ..............................20

THROTTLE VALVE CLOSED POSITIONLEARNING AND IDLE AIR VOLUME LEARNING .......21

Outline........................................................................21Throttle Valve Closed Position Learning ...................21Idle Air Volume Learning ...........................................21

FUEL PRESSURE INSPECTION ..................................23Quick Inspection ........................................................23Inspection Using Fuel Pressure Gauge ....................23

INSPECTION OF FUEL CUT-OFF FUNCTIONS ..........25ECM INPUT/OUTPUT SIGNAL REFERENCEVALUE ............................................................................26

Circuit Diagram..........................................................26ECM Terminal Layout ................................................27Measurement Values from Oscilloscope andCircuit Tester..............................................................28

INSPECTION OF EVAPORATIVE EMISSIONCONTROL SYSTEM ......................................................34

Inspection...................................................................34INSPECTION OF POSITIVE CRANKCASEVENTILATION SYSTEM ................................................35

PCV (Positive Crankcase Ventilation) Valve .............35

OutlineThis section describes maintenance procedures for newly-adoptedQR20DE engine.

Special Service Tools

Description Application Remarks

Fuel pressure gaugeST19590000

For fuel pressure measurement

Existing

Socket for heated oxygensensor removal and installa-tionKV10113700

Removal and installation ofheated oxygen sensor

CONSULT-IIEG11870000Diagnosis program cardVersion AED00B

For system inspection and diag-nosis

Check adapter VEG17550000(for SMJ 150-pin connector)

For ECM input/output signalinspection

Harness adapterEG17550100(150 to 111-pin convertingadapter)

OUTLINE/PREPARATION

EC-2

OutlineI Electric concentrated engine control system, which performs various controls such as fuel injection control,

ignition timing control, idle speed control and EVAP canister purge control with a single control unit, hasbeen adopted.

I For various torque controls, and improvement of driving feeling, electric throttle control system has beenadopted.

I Diagnostic system applicable to CONSULT-II has been adopted for easier inspection, service, and troublediagnostic operations.

I Hall IC (element) type crankshaft position sensor (POS sensor and PHASE sensor) has been adopted.

OUTLINE OF ENGINE CONTROL

Item Description of control

Electric throttle controlI Adopts electric throttle control equipped with throttle motor to control throttle position

depending on driving condition.

Fuel injection control

I With SOFIS control, fuel injection amount is optimized to improve exhaust performanceand system response.

I Adopts control through learning of air/fuel ratio feedback. The system corrects ratio dur-ing a transitional condition such as sudden sharp changes in ratio in order to improvedrivability.

Ignition timing control

I Adopts a Hall IC (element) type crankshaft position sensor to perform controls.Therefore, optimum ignition timing is obtained for every operating condition.

I Adopts the electronic distribution system (NDIS) in which each cylinder is equipped withan ignition coil incorporating a power transistor for better ignition performance.

I Performs knock control, in which ignition timing is retarded or advanced according to thepresence of knocking. Therefore, optimum ignition timing is selected according to driv-ing condition and fuel in use.

Idle speed control I Adopts electric throttle control to variably adjust air intake amount for idle speed control.

Fuel pump drive control I Turns fuel pump relay ON/OFF according to engine speed signal.

Air conditioner cut-off controlI Turns air conditioner relay OFF to reduce engine load during acceleration or when engine

is at high speed.

Heated oxygen sensor heater controlI Accelerates warming-up of heated oxygen sensor to improve air/fuel ratio feedback

function.

Cooling fan controlI Controls ON/OFF of cooling fan relay according to vehicle speed, coolant temperature,

air conditioner signals and so on.

CVTC (Continuous Valve Timing Control)Intake valve timing control

I Performs duty control of intake valve timing control solenoid valve depending on oper-ating condition for optimum valve timing.

EVAP canister purge control I Performs duty control of canister purge flow rate depending on operating condition.

Engine, A/T integrated controlI Optimizes engine torque and lockup during gearshift via CAN communication to reduce

shocks generated during gearshift.

Fail-safe controlI Ensures safe vehicle operation and enables vehicle to be driven in an emergency when

any of major system components (mass air flow sensor, engine coolant temperaturesensor, etc.) are malfunctioning.

Diagnostic system

I Adopts self-diagnosis system for easier trouble diagnosis, and has been modified toapply to CONSULT-II.

I Improved self-diagnostic performance with additional functions for components ofexhaust control system which influences emissions.

SYSTEM OUTLINE QR20DE

EC-3

System Diagram

SEC293D


EC-4

Control Items, Sensors and ActuatorsThe table below shows main sensors and actuators related toengine control items.

Control item

: Significant impact to control

Fuel injection control

Igni

tion

timin

gco

ntro

l

Idle

spee

dco

ntro

l

Fue

lpum

pdr

ive

cont

rol

Air

cond

ition

ercu

t-of

fco

ntro

l

Eng

ine,

A/T

inte

grat

edco

ntro

l

Coo

ling

fan

cont

rol

EV

AP

cani

ster

purg

eco

ntro

l

Inta

keva

lve

timin

gco

ntro

l

Sel

f-di

agno

sis

Fai

l-saf

e

Fue

linj

ectio

nco

ntro

l

Air/

fuel

ratio

feed

back

cont

rol

Fue

lcut

-off

cont

rol

Sen

sors

Hall IC type crankshaft positionsensor

q q q

Mass air-flow sensor q q q q qEngine coolant temperaturesensor

q q q q q q q q q q

Heated oxygen sensor q q qKnock sensor q q qVehicle speed sensor q q q q q q q q qThrottle position sensor q q q q q q q qAccelerator pedal position sen-sor

q q q q q q q q q

Ignitionswitch

START q q q q q qIGN q q q q q

Air conditioner switch q q q q qPark/Neutral position switch q q q q q qPower steering oil pressure sen-sor

q q q q

Electrical load switch qRefrigerant pressure sensor q q qIntake air temperature sensor q q qBattery voltage q q q

Act

uato

rs

Injector q

Ignitionsystem

Power transistor qIgnition coil

Electric throttle control actuator q qFuel pump relay

Fuel pump

ECM relay qCooling fan relay qAir conditioner relay q q qEVAP canister purge volumecontrol valve

q

CVTC valve (Intake valve timingcontrol solenoid valve)

q q q q


EC-5

Fail-safe FunctionI When any of critical sensors or systems is malfunctioning,

fail-safe function estimates operating conditions with otherinput signals and selects safer conditions for engine (vehicle)control, based on the data previously stored in ECM.

ITEMS AND INDICATION

Sensor Malfunction Fail-safe Indicator

Mass air flow sensor

Same as self-diagnosticmalfunctiondetection con-ditions. (Referto EC-9.)

I Selects fuel injection pulse width according to engine speed and throttleposition so that vehicle can be driven. However, fuel injection will beinhibited when engine speed exceeds approx. 2,400 rpm.

I Idle speed will be approx. 800 rpm.

MIL lights up.

Engine coolant tem-perature sensor

I Uses estimated engine coolant temperature (varies with elapsed timeafter start) to perform controls so that vehicle can be driven.

I Turns ON cooling fan relay.

Accelerator pedalposition sensor

I If one system is open, fuel injection will be inhibited (fuel cut-off) whenengine speed exceeds approx. 2,500 rpm. However, if a connector isdisconnected, throttle valve returns automatically to a position whichenables low-speed driving.

Throttle position sen-sor

I Fixes output to a preset value so that vehicle can be driven. However,fuel injection will be inhibited (fuel cut-off) when engine speed exceedsapprox. 2,500 rpm.

Intake valve timingcontrol system

I Fixes to the most retarded ignition timing so that vehicle can be driven.

Malfunction indicatorlamp

I If any malfunction occurs which deteriorates exhaust performance ordriving, fuel injection will be inhibited (fuel cut-off) when engine speedexceeds approx. 2,500 rpm to avoid warning error.

FAIL-SAFE FUNCTION QR20DE

EC-6

OutlineI In self-diagnosis, when any of critical sensors, actuators, or exhaust systems necessary for engine con-

trols is malfunctioning and self-diagnostic malfunction detection conditions are satisfied, malfunctioningsystem is stored in ECM for easier trouble diagnosis. Results of self-diagnosis are either informed of bymalfunction indicator lamp (MIL) in combination meter, or displayed on CONSULT-II. This section describesindications by MIL.

I There are two diagnostic modes, mode 1 and 2.The system is set to mode 1 in normal condition, while inmode 2 self-diagnostic mode or function to monitor heated oxygen sensors is available.

Self-diagnosis Operation ProcedureI To start self-diagnosis mode, to monitor heated oxygen sensor, or to erase self-diagnosis results, refer to

the following.CAUTION:If accelerator pedal position sensor system has any malfunction, self-diagnosis (when CONSULT-II isnot used) cannot be started. Thus, perform self-diagnosis using CONSULT-II and eliminate malfunc-tion.

STARTING MODE 2 (SELF-DIAGNOSIS)1. Turn ignition switch ON with accelerator pedal released.2. Immediately after turning ignition switch ON (within 3 seconds), fully depress and release accelerator pedal

repeatedly for 5 times within 5 seconds. (Stop the procedure with accelerator pedal released.)3. Fully depress accelerator pedal within 7 seconds after releasing pedal, and keep it fully depressed for

approximately 10 seconds (until malfunction indicator lamp starts blinking). (Self-diagnosis starts.)4. Release accelerator pedal, and perform self-diagnosis.

I With ignition switch remaining ON, self-diagnosis starts. (Self-diagnosis in mode 2)I Start engine during self-diagnostic mode to shift to heated oxygen sensor monitoring function. (Heated

oxygen sensor monitor in mode 2)I Turn OFF ignition switch to automatically go back to mode 1. (Normal condition)

CAUTION:I Measure the time precisely using a watch.I If mode 2 does not start, keep ignition switch OFF for approximately 10 seconds or more, then try

again.

ERASING SELF-DIAGNOSIS RESULTS1. Fully depress accelerator pedal in mode 2 (self-diagnosis), and keep it fully depressed for 10 seconds or

more. ( Self-diagnosis results are erased.I Release accelerator pedal, and confirm that the self-diagnosis results are erased.I Turn OFF ignition switch to automatically go back to mode 1.

SEC829C

SELF-DIAGNOSIS FUNCTION QR20DE

EC-7

SAT652J

Malfunction Indicator Lamp (MIL) Indication

MODE 1: BULB CHECKI Malfunction indicator lamp comes ON when ignition switch is

turned ON (engine not started). It goes OFF after engine start.

MODE 1: MALFUNCTION WARNINGI When fail-safe function is operating with engine running, or

when a malfunction is detected by self-diagnosis, the systemgoes into malfunction warning mode. It warns driver by light-ing up MIL in combination meter.

I There are two types of MIL indications: Trip 1 indication andtrip 2 indication. For the latter, MIL will not light up during trip1.

I For description of warning items and trip, refer to EC-9.

ECD0695D

MODE 2: SELF-DIAGNOSISI In this mode, malfunctioning circuit is indicated as a blinking

pattern by MIL. (Standing for code No.)I The code No. “0000” is indicated when no malfunction is

detected.

EFJ0041D

MODE 2: HEATED OXYGEN SENSOR MONITORI In this mode, condition of air/fuel ratio is indicated as a blink-

ing pattern by MIL.I After warming-up, bring and keep engine speed at 2,000 rpm

constantly. Under this condition, check if MIL blinks 5 times ormore within 10 seconds. (Note that air/fuel ratio feedback con-trol is working even during idling.)

I With air/fuel ratio feedback control ON,When heated oxygen sensor output is high (rich): MIL OFFWhen heated oxygen sensor output is low (lean): MIL ON

I With air/fuel ratio feedback control clamped: MIL indicates thecondition immediately before clamping.

I With air/fuel ratio feedback control stopped: MIL OFF


EC-8

Self-diagnosis Display Items

CodeNo.

Item to be diagnosed Condition of detecting malfunction

MIL (Mal-functionIndicatorLamp)

Trip

0000 NO DTC I No malfunction is detected in any of the circuits. — —

0100MASS AIR FLOW (MAF)SENSOR

I With engine stopped (ignition switch ON), mass air flow sensor out-put voltage is approximately 4.9V or higher (open circuit) for a prede-termined time.

I With engine running, mass air flow sensor output voltage is approxi-mately 0.5V or lower (short circuit) for a predetermined time.

I With engine running, mass air flow sensor output voltage stays atapproximately 1V for a predetermined time.

ON 1

0110INTAKE AIR TEMPERA-TURE (IAT) SENSOR

I Intake air temperature sensor output voltage is approximately 4.5V orhigher (open circuit), or less than 0.04V (short circuit) for a predeter-mined time.

ON 2

0115ENGINE COOLANTTEMPERATURE (ECT)SENSOR (CIRCUIT)

I Engine coolant temperature sensor output voltage is approximately4.8V or higher (open circuit), or less than 0.06V (short circuit) for apredetermined time.

ON 2

0120THROTTLE POSITION(TP) SENSOR

I Sensor battery voltage has malfunction.I Throttle position sensor is open or short-circuited.I Incorrect correlation between throttle position sensors 1 and 2

occurs.I Learned value of throttle fully-closed position is considerably small,

or unable to be learned.

ON* 1

0121ACCELERATOR PEDALPOSITION (APP) SEN-SOR

I Accelerator pedal position sensor is either open or short-circuited.I Incorrect correlation between accelerator pedal position sensors 1

and 2 occurs.ON* 1

0130HEATED OXYGEN SEN-SOR 1 (1, 4 cyl) (CIR-CUIT)

I Heated oxygen sensor 1 (circuit) is open. ON 2

0134HEATED OXYGEN SEN-SOR 1 (1, 4 cyl) (HIGHVOLTAGE)

I Heated oxygen sensor 1 (high voltage) output voltage is higher thannormal (2V or higher).

ON 2

0135HEATED OXYGEN SEN-SOR 1 (1, 4 cyl)HEATER

I Heated oxygen sensor 1 heater is open. ON 2

0150HEATED OXYGEN SEN-SOR 2 (2, 3 cyl) (CIR-CUIT)

I Heated oxygen sensor 2 (circuit) is open. ON 2

0154HEATED OXYGEN SEN-SOR 2 (2, 3 cyl) (HIGHVOLTAGE)

I Heated oxygen sensor 2 (high voltage) output voltage is higher thannormal (2V or higher).

ON 2

0155HEATED OXYGEN SEN-SOR 2 (2, 3 cyl)HEATER

I Heated oxygen sensor 2 heater is open. ON 2

0171FUEL INJECTION SYS-TEM FUNCTION (1, 4cyl) (LEAN)

I After warming-up, air/fuel ratio is very lean, and heated oxygen sen-sor output is fixed.

ON 2

0172FUEL INJECTION SYS-TEM FUNCTION (1, 4cyl) (RICH)

I After warming-up, air/fuel ratio is very rich, and heated oxygen sen-sor output is fixed.

ON 2

0174FUEL INJECTION SYS-TEM FUNCTION (2, 3cyl) (LEAN)

I After warming-up, air/fuel ratio is very lean, and heated oxygen sen-sor output is fixed.

ON 2

0175FUEL INJECTION SYS-TEM FUNCTION (2, 3cyl) (RICH)

I After warming-up, air/fuel ratio is very rich, and heated oxygen sen-sor output is fixed.

ON 2

0325 KNOCK SENSOR (KS)I Knock sensor is either open or short-circuited for a predetermined

time.— 2


EC-9

CodeNo.

Item to be diagnosed Condition of detecting malfunction

MIL (Mal-functionIndicatorLamp)

Trip

0335CRANKSHAFT POSI-TION (CKP) SENSOR(POS)

I POS signal is not detected for a predetermined time or longer atengine start or while engine is running (during PHASE signal input).

I Malfunctioning waveform of POS signal is detected for a predeter-mined time while engine is running (during PHASE signal input).

ON 2

0340CAMSHAFT POSITION(CMP) SENSOR(PHASE)

I PHASE signal is not detected for a predetermined time at enginestart.

I PHASE signal is not detected for a predetermined time while engineis running (during POS signal input).

I Malfunctioning waveform of PHASE signal is detected for a predeter-mined time while engine is running (during POS signal input).

ON 2

0500VEHICLE SPEED SEN-SOR (VSS)

I Vehicle speed sensor signal is not input for a predetermined timeunder specific conditions while driving after warming-up.

ON 2

0550POWER STEERING OILPRESSURE (PSP) SEN-SOR

I Power steering oil pressure sensor output voltage is either approxi-mately 4.8V or higher (open circuit), or lower than 0.1V (short circuit)for a predetermined time.

ON 2

0605 ECM I Malfunction occurs in CPU or circuit system of ECM. ON*1 or 2(Note)

0650MIL (Malfunction Indica-tor Lamp) (CIRCUIT)

I Malfunction occurs repeatedly for specific times either in bulb or cir-cuit.

— 2

1000or

2702

CAN COMMUNICATIONLINE

I Malfunction exists either in transmitted/received data of CANcommunication, or in C/U. Therefore, data transmission/receptioncannot be confirmed.

I Data of CAN communication is not transmitted or received for a pre-determined time or longer.

— 2

1065ECM POWER SUPPLY(BACKUP)

I No power is supplied to ECM continuously for some time. ON 2

1110IVT (Intake Valve Timing)CONTROL

I There is a certain difference between target angle and actual angle. ON 2

1111IVT (Intake Valve Timing)CONTROL SOLENOIDVALVE (CIRCUIT)

I Intake valve timing control solenoid valve is either open or short-cir-cuited.

ON 2

1121ELECTRIC THROTTLECONTROL ACTUATOR

I Electric throttle control does not operate normally because of itsmechanical malfunction.

ON* 1

1122ELECTRIC THROTTLECONTROL FUNCTION(CIRCUIT)

I Malfunction occurs in correlation between target throttle angle andactual throttle angle.

I Excess current flow in electric throttle control actuator control systemON* 1

1123THROTTLE CONTROLMOTOR RELAY (CIR-CUIT)

I Throttle control motor relay is stuck to ON or OFF.

ON* (Onlywhen

stuck toON)

Stuck toON: 1

Stuck toOFF: 2

1217ENGINE OVER TEM-PERATURE (OVER-HEAT)

I Engine coolant temperature sensor signal output voltage is approxi-mately 0.35V or lower for a predetermined time. (When engine cool-ant temperature sensor signal circuit is normal.)

ON 1

1320 IGNITION SIGNAL I Ignition signal is not continuously generated while engine is running. ON 2

1706PARK/NEUTRAL POSI-TION (PNP) SWITCH

I Park/Neutral position switch is stuck to ON. ON 2

1805 BRAKE SWITCH I Brake switch is either open or short-circuited. — 2

NOTE: The number of trips varies depending on the item/content to be diagnosed.

CAUTION:When malfunction is detected in some of the above self-diagnostic test items, related malfunctionsmay be detected in self-diagnosis of systems other than engine. Therefore, malfunctions should alsobe confirmed in self-diagnostic tests for systems other than engine.


Self-diagnosis Display Items (Cont’d)

EC-10

Trip 1: If malfunction is detected by self-diagnosis while ignition switch is ON (engine is running) until it is turnedOFF (This is defined as “trip”), MIL is lit. And normal diagnostic trouble code is recorded immediatelyafter the detection.

Trip 2: If malfunction is detected by self-diagnosis for the first time in the first trip, tentative diagnostic troublecode is recorded. If malfunction is detected again by self-diagnosis in the next trip (second trip) whiletentative diagnostic trouble code is recorded, MIL is lit and normal diagnostic trouble code is recorded.Although while tentative diagnostic trouble code is being recorded, normal diagnostic trouble code isindicated by malfunction indicator lamp.

CONDITIONS TO TURN OFF MILI After normal status is recovered, diagnosed items of MIL marked with * turn OFF when ignition switch is

turned ON (engine starts) next time.I Regarding other diagnosed items, after normal status is recovered, turn ignition switch OFF once, then

erase the results.

Erasing Self-diagnosis ResultsTo erase self-diagnosis results, refer to “Self-diagnosis function/self-diagnosis operation procedure” on EC-7.


Self-diagnosis Display Items (Cont’d)

EC-11

OutlineI CONSULT-II performs the following based on combination of

data received and commands transmitted through communi-cation line from ECM:

Diagnostic test mode Description

Work support

I Simplifies the related work necessary for inspection.I Displays input/output signal data associated with the work.I Allows idle air volume learning.I Allows setting target controlling values of ignition timing and idle rpm.

Self-diagnostic results

I Displays name of system and basic inspection items where malfunction is detected and memorizedby ECM.

I Displays recorded data when malfunction occurs.I Prints displayed items.I Erases data memorized.

Data monitor

I Provides useful data and self-diagnosis results for determination of main cause.I Displays input/output data of ECM in real time.I Memorizes, stores, and prints data.I Detects malfunction by real-time diagnosis.

Data monitor (spec)I Displays normal idling data (after warming-up) range of mass air/flow sensor, base fuel schedule,

and air/fuel ratio alpha in a form of bar or line graph with real-time input/output data indicated ingraph.

Active testI Can be used to determine and identify main cause based on self-diagnosis results and data from

data monitor.I Allows checking actuator operations by sending drive signals to actuators.

ECM part number I Displays part number stored in ECM.

JEC294D

BASIC PROCEDURE1. Turn ignition switch OFF.2. Connect CONSULT-II to DDL2 data link connector on vehicle.3. Turn ignition switch ON.4. Touch “START”.5. Touch “ENGINE”.

SEF824Y

6. Perform necessary diagnostic tests in the required mode.

CONSULT-II QR20DE

EC-12

Work Support ModeCONSULT-II makes supporting control for inspection.When work support instruction is given from CONSULT-II to ECM,necessary controls will be performed.

DISPLAY ITEM LIST

Work support mode Content

FUEL PRESSURE RELEASEDeactivates fuel pump, and stops engine.(While cranking, release pressure from fuel piping.)

IDLE AIR VOL LEARNLearns minimum idle airflow amount required for idle speed control when the predeterminedconditions are specified following replacement of electric throttle control or ECM.

SELF-LEARNING CONT Clears already learned air/fuel ratio feedback correction factors.

TARGET IGN TIM ADJ*Sets a control target value of initial ignition timing (−15° to 5°).CAUTION:Inspector shall check that actual timing agrees with target timing with timing light.

TARGET IDLE RPM ADJ* Sets a control target value of idle speed (0 to 250 rpm).

*: To be used to change target set value of idle speed or ignition timing for a relevant reason such as to counter against rough idling.

SBIA0062E

Self-diagnostic Results ModeWhen any of ECM input/output signal circuits are malfunctioning,malfunctioning circuit and basic items to be checked are recorded.Freeze frame data is displayed based on the record.

OPERATION PROCEDURE (EXAMPLE: MALFUNCTIONIN MASS AIR FLOW SENSOR SIGNAL CIRCUIT)1. Touch “MAF SEN/CIRCUIT [P0100]” on self-diagnostic results

screen.I For timing display contents, refer to EC-15.

SBIA0073E

2. Items of basic check points are displayed.CAUTION:Check items of some self-diagnosis are not displayed.

SBIA0072E

3. By touching “FF DATA” on self-diagnostic results screen,“FREEZE FRAME DATA” is displayed indicating driving condi-tion when malfunction is detected.

I For contents of data stored when malfunction detected, referto EC-15.

CONSULT-II QR20DE

EC-13

Self-diagnostic test items CONSULT-II displayed item TripCondition of malfunc-

tion detection

NO DTCNO DTC IS DETECTED. FURTHERTESTING MAY BE REQUIRED.

—

Refer to “Self-diagno-sis display items” onEC-9.

MASS AIR FLOW (MAS) SENSOR MAF SEN/CIRCUIT [P0100] 1

INTAKE AIR TEMPERATURE (IAT) SENSOR AIR TEMP SEN/CIRC [P0110] 2

ENGINE COOLANT TEMPERATURE (ECT)SEN-SOR (CIRCUIT)

ECT SEN/CIRC [P0115] 2

THROTTLE POSITION (TP) SENSOR THRTL POS SEN/CIRC [P0120] 1

ACCELERATOR PEDAL POSITION (APP) SEN-SOR

APP SEN/CIRCUIT [P0121] 1

HEATED OXYGEN SENSOR 1 (CIRCUIT) HO2S1 (B1) [P0130] 2

HEATED OXYGEN SENSOR 1 (HIGH VOLTAGE) HO2S1 (B1) [P0134] 2

HEATED OXYGEN SENSOR 1 HEATER HO2S1 (B1) [P0135] 2

HEATED OXYGEN SENSOR 2 (CIRCUIT) HO2S1 (B2) [P0150] 2

HEATED OXYGEN SENSOR 2 (HIGH VOLTAGE) HO2S1 (B2) [P0154] 2

HEATED OXYGEN SENSOR 2 HEATER HO2S1 (B2) [P0155] 2

FUEL INJECTION SYSTEM FUNCTION (LEAN) FUEL SYS-LEAN-B1 [P0171] 2

FUEL INJECTION SYSTEM FUNCTION (RICH) FUEL SYS-RICH-B1 [P0172] 2

FUEL INJECTION SYSTEM FUNCTION (LEAN) FUEL SYS-LEAN-B2 [P0174] 2

FUEL INJECTION SYSTEM FUNCTION (RICH) FUEL SYS-RICH-B2 [P0175] 2

KNOCK SENSOR (KS) KNOCK SEN/CIRC-B1 [P0325] 2

CRANKSHAFT POSITION (CKP) SENSOR (POS) CKP SEN/CIRCUIT [P0335] 2

CAMSHAFT POSITION (CMP) SENSOR (PHASE) CMP SEN/CIRCUIT [P0340] 2

VEHICLE SPEED SENSOR (VSS) VEH SPEED SEN/CIRC [P0500] 2

POWER STEERING OIL PRESSURE (PSP) SEN-SOR

PW ST P SEN/CIRC [P0550] 2

ECM ECM [P0605]1 or 2

(Note 2)

MIL (Malfunction Indicator Lamp) (CIRCUIT) MIL/CIRC [P0650] 2

CAN COMMUNICATION LINE (Note 1) CAN COMM CIRCUIT [U1000] or [C2702] 1

ECM POWER SUPPLY (BACKUP) ECM BACK UP/CIRC [P1065] 2

IVT (Intake Valve Timing) CONTROL INT/V TIM CONT-B1 [P1110] 2

IVT (Intake Valve Timing) CONTROL SOLENOIDVALVE (CIRCUIT)

INT/V TIM V/CIR-B1 [P1111] 2

ELECTRIC THROTTLE CONTROL ACTUATOR ETC ACTR [P1121] 1

ELECTRIC THROTTLE CONTROL FUNCTION(CIRCUIT)

ETC FUNCTION/CIRC [P1122] 1

THROTTLE CONTROL MOTOR RELAY (CIRCUIT) ETC MOT RLY/CIRC [P1123]

Stuck toON: 1

Stuck toOFF: 2

ENGINE OVER TEMPERATURE (OVERHEAT) ENG OVER TEMP [P1217] 1

IGNITION SIGNAL IGN SIGNAL PRIMARY [P1320] 2

PARK/NEUTRAL POSITION (PNP) SWITCH P-N POS SW/CIRCUIT [P1706] 2

BRAKE SWITCH BRAKE SW/CIRCUIT [P1805] 2

Note 1: The number of trips varies depending on the item/content to be diagnosed.Note 2: I When self-diagnosis is detected, check “CAN diagnosis support monitor” in data monitor.

I After printing monitor items, refer to “CAN system in EL section”.NOTE: “Manual trigger” setting will facilitate printing.

CONSULT-II QR20DE

Self-diagnostic Results Mode (Cont’d)

EC-14

Normal Malfunction (example)

CAN COMM: OKCAN CIRC 1: OKCAN CIRC 2: OKCAN CIRC 3: UNKWNCAN CIRC 4: UNKWNCAN CIRC 5: UNKWN

CAN COMM: OKCAN CIRC 1: UNKWNCAN CIRC 2: UNKWNCAN CIRC 3: UNKWNCAN CIRC 4: UNKWNCAN CIRC 5: UNKWN

Note 2: Number of trips varies depending on the item to be diagnosed.CAUTION:When malfunction is detected in some of the above self-diagnostic test items, related malfunctions may be detected in self-diagnosis of systems other than engine. Therefore, malfunctions shall also be confirmed in self-diagnostic tests for sys-tems other than engine.Trip 1: If malfunction is detected by self-diagnosis while ignition switch is ON (engine is running) until it is turned OFF (This is defined

as “trip”), MIL is lit and normal diagnostic trouble code is recorded immediately after the detection.Trip 2: If malfunction is detected by self-diagnosis for the first time in the first trip, tentative diagnostic trouble code is recorded. If

malfunction is detected again by self-diagnosis in the next trip (second trip) tentative diagnostic trouble code is recorded, MILis lit and normal diagnostic trouble code is recorded.

Timing display of self-diagnosis resultsI For items of trip 1, timing “0” is displayed immediately after detection of malfunction.I For items of trip 2, when malfunction is detected for the first time (trip 1), timing “1t” is displayed. When

malfunction is detected again in the next trip (trip 2), it is displayed as “0”. Accumulative counting is per-formed at the end of warming-up operation.

Conditions to turn off MILI After normal status is recovered, diagnosed items of MIL marked with * turn OFF when ignition switch is

turned ON (engine starts) next time.I Regarding other diagnosed items, after normal status is recovered, turn ignition switch OFF once, then

erase the results.

FREEZE FRAME DATAI If malfunction is detected in self-diagnosis test, operating con-

ditions are stored and displayed.I Such data can be used to reproduce the malfunction.I When malfunctions are detected in multiple systems, only mal-

functioning item detected first will be stored in memory anddisplayed. When the same malfunction is detected several dif-ferent times, the first malfunction data will be stored.

Stored data item Unit Description

FUEL SYS-B1FUEL SYS-B2

—

Displays condition of air/fuel ratio feedback control when malfunction is detected.Mode 2: No feedback control performed because of system malfunction.Mode 3: No feedback control performed under some operating conditions.Mode 4: Feedback control performed using heated oxygen sensors.Mode 5: Conditions to shift into feedback control not established after ignition switch is

turned ON.

CAL/LD VALUE %Calculates engine load from quantity of fuel injection when a malfunction is detected,and displays it.

COOLANT TEMP °C Displays engine coolant temperature when malfunction is detected.

L-FUEL TRIM-B1L-FUEL TRIM-B2

%

Displays air/fuel ratio feedback value learned when malfunction is detected.

S-FUEL TRIM-B1S-FUEL TRIM-B2

Displays air/fuel ratio feedback correction factor when malfunction is detected.

ENGINE SPEED rpm Displays engine speed when malfunction is detected.

VEHICLE SPEED km/h Displays vehicle speed when malfunction is detected.

B/FUEL SCHDL msec Displays fuel injection pulse width when malfunction is detected.

INT/A TEMP SE °C Displays intake air temperature when malfunction is detected.

B1: No. 1, 4 cyl., B2: No. 2, 3 cyl.

CONSULT-II QR20DE

Self-diagnostic Results Mode (Cont’d)

EC-15

Data Monitor ModeI Allows determining and identifying cause of malfunction based

on self-diagnosis test results.I Displays ECM input/output signal data in real time.I Records and prints out data before and after engine malfunc-

tioning or engine stall, either automatically or manually.

DISPLAY ITEM LIST

Monitored item Unit Description

Standard value

At idleAt approximately

2,000 rpm

ENG SPEED rpmEngine speed calculated from signal of camshaftposition sensor

700±50(N or P position)

MAF A/F SE-B1 V Mass air flow sensor output voltage Approx. 1.3 1.7

B/FUEL SCHDL msec Value calculated by ECM Approx. 2.5 - 4.0

A/F ALPHA-B1A/F ALPHA-B2

%Average of air/fuel ratio feedback correction factorfor each cycle

Approx. 90 - 110

COOLA TEMP/S °CValue converted from output voltage of engine cool-ant temperature sensor into coolant temperature

Approx. 80 or more

HO2S1 (B1)HO2S1 (B2)

V Output voltage of heated oxygen sensorFluctuates between approx. 0 to 0.2V, and

approx. 0.7 to 0.9V

HO2S1 MNTR (B1)HO2S1 MNTR (B2)

RICH/LEAN

Air/fuel ratio status of heated oxygen sensor signalduring air/fuel ratio feedback controlRICH: Controlling to lean based on rich judgementLEAN: Controlling to rich based on lean judgement

Alternately and slowlyrepeats rich and lean.

Alternately repeatsrich and lean 5 times

or more within 10seconds.

VHCL SPEED SE km/h Values calculated from vehicle speed sensorNearly agrees with the indication of speedom-

eter.

BATTERY VOLT

V

Power supply voltage for ECM Approx. 11 - 14

ACCEL SEN 1Output voltage of accelerator pedal position sensor1

Approx. 0.45 - 0.55 Approx. 0.6 - 0.7ACCEL SEN 2

Output voltage of accelerator pedal position sensor2

THRTL POS SEN Output voltage of throttle position sensor 1Approx. 0.55 - 0.6 Approx. 0.7 - 0.75

THRTL POS SEN 2 Output voltage of throttle position sensor 2

INT/A TEMP SE °CValue converted from intake air temperature sensoroutput voltage into intake air temperature

A value close to ambient temperature (Variesdepending on driving status.)

START SIGNAL

ON/OFF ON or OFF condition resulted from each signal

At ignition switch START: ONOther than above: OFF

CLSD THL POSAccelerator pedal released: ON

Accelerator pedal fully depressed: OFF

AIR COND SIGAir conditioner ON: ON

Air conditioner OFF: OFF

P/N POSI SWN or P position: ON

Other than above: OFF

PW/ST SIGNALTurning steering wheel: ON

Keeping steering wheel straight-ahead: OFF

LOAD SIGNALLighting switch or rear window defogger

switch ON: ONOther than above: OFF

IGNITION SWIgnition switch ON: ONOther than above: OFF

HEATER FAN SWFan running: ON

Fan stopped: OFF

BRAKE SWBrake pedal depressed: ON

Brake pedal not depressed: OFF

INJ PULSE-B1INJ PULSE-B2

msecInjection amount calculated by ECM

Approx. 2 - 4

TGN TIMING °BTDC Approx. 15 Approx. 30 - 40

CONSULT-II QR20DE

EC-16

Monitored item Unit Description

Standard value

At idleAt approximately

2,000 rpm

CAL/LD VALUE

%

Calculated value of engine load from fuel injectionamount

Approx. 0 - 20 Approx. 14 - 28

PURG VOL C/VDuty ratio of EVAP canister purge volume controlvalve(Purge flow rate rises as the number increases.)

Approx. 7.5 Approx. 30

INT/V TIM (B1) °CACam position detected by camshaft position sensor(PHASE)

Varies depending on engine speed/loadINT/V SOL (B1) %

Duty ratio of intake valve timing control solenoidvalve

AIR COND RLY

ON/OFF Controlling condition calculated by ECM

Air conditioner ON: ONAir conditioner OFF: OFF

FUEL PUMP RLYPump running: ON

Pump stopped: OFF

THRTL RELAYIgnition switch ON: ON

Ignition switch OFF: OFF

COOLING FAN LOW/HI/OFF Controlling condition calculated by ECMRunning at low speed: LOWRunning at high speed: HI

Fan stopped: OFF

HO2S1 HTR (B1)HO2S1 HTR (B2)

ON/OFF Controlling condition calculated by ECM ONWhen at or aboveapprox. 3,600 rpm:

OFF

IDL A/V LEARN DONE/YET Idle air volume learning conditionLearning completed: DONE

Learning not completed: YET

AC PRESS SEN V Refrigerant pressure sensor output voltageApprox. 1.3 (Voltage becomes higher when

air conditioner refrigerant pressureincreases.)

Voltage Displays value measured with voltage probe

Frequency

Displays value measured with pulse probe

DUTY-HI

DUTY-LOW

PLS WIDTH-HI

PLS WIDTH-LOW

B1: No. 1, 4 cyl., B2: No. 2, 3 cyl.

SEF601Z

Data Monitor Mode (SPEC)I Displays normal idling data (after warming-up) range of mass

air flow sensor, base fuel schedule, and air/fuel ratio alpha ina form of bar or line graph with the real-time output/input dataindicated in graph.

CONSULT-II QR20DE

Data Monitor Mode (Cont’d)

EC-17

Active Test ModeUse this mode to determine and identify details of malfunction,based on self-diagnosis test results and data obtained from datamonitor mode. CONSULT-II, instead of ECM on vehicle, transmitscommands to activate drive signals to actuators, and checks theiroperations.

DISPLAY ITEM LIST

Test items Description

FUEL INJECTIONI Can increase or decrease amount of fuel injection (±25%).I Can reproduce malfunctioning conditions resulting from incorrect air/fuel ratio (e.g. hesitation, poor

acceleration, poor racing, etc.) to solve these malfunctions (by determining causes).

IGNITION TIMING I Allows specifying a correction factor for retarding (−10 to 0°).

POWER BALANCEI Stops operation of specified injector at a fixed IACV-AAC valve opening level, displaying varied val-

ues of engine torque at that time.I Mainly used to inspect for misfiring cylinders.

COOLING FAN I Can operate cooling fan LOW-HI-OFF voluntary.

ENGINE COOLANTTEMP

I Can increase or decrease engine coolant temperature (−30 to 110°C).I Reproduces malfunctioning conditions with low or high engine coolant temperature.

FUEL PUMP RELAYI Reproduces malfunctioning conditions (of hesitation, engine stall, etc.) possibly related to fuel pump

by switching ON or OFF.

PURGE VOL CONT/V I Can increase or decrease purge flow rate by changing duty ratio (0 to 100%).

V/T ASSIGN ANGLE I When assigned angle is changed (±10°), retard/advance angle of intake camshaft can be controlled.

AIR COND RLY I Can perform voluntary switching operation of air conditioner.

SBIA0074E

ECM Part Number ModeIn this mode, part number of ECM installed in vehicle is displayed.

CONSULT-II QR20DE

EC-18

Idle Speed Specification (After warming-up)Transaxle A/T

Idle speed (N or P position)(with air conditioner turned ON) (rpm)

700±50 (725 - 800)

Ignition timing (°BTDC/rpm) 15±2/700

CO/HC concentration (%)/(ppm) 0.1 max./50 max.

I Make sure that engine is free of electrical load, such as airconditioner, power steering pump, and other electrical compo-nents. Selector lever must be in “N” or “P” position duringinspection and adjustment.

I Warm up engine to normal operating temperature.

JEC294D

PBIA0151J

Idle Speed InspectionI Connect CONSULT-II to DDL2 data link connector (at

the bottom of fuse block) on vehicle.I Select “ENG SPEED” in data monitor mode and check

idle speed.I Connect an induction type (current detection type)

tachometer to primary wire of No. 1 cylinder to checkidle speed.

I Primary wire of No. 1 cylinder is for detection of enginespeed and ignition timing. It is made longer than othercylinders’ wires and looped for these purposes.

I Confirm that idle speed is within specification.CAUTION:When idle speed is outside specifications, perform “Idle AirVolume Learning” (Refer to EC-21).

PBIA0506J

Ignition Timing InspectionI Install a timing light to primary wire of No. 1 cylinder.I Primary wire of No. 1 cylinder is made longer than other cylin-

ders’ wires and looped.I Confirm that ignition timing and idle speed are within specifi-

cations.CAUTION:When ignition timing is outside specifications, perform “IdleAir Volume Learning” (Refer to EC-21).

INSPECTION OF IDLE SPEED, IGNITION TIMING,AND AIR/FUEL RATIO QR20DE

EC-19

CO/HC Concentration InspectionVehicle uses air/fuel ratio feedback system with learning function.Because a wide range of compensation is available, no CO/HCconcentration adjustment is necessary.I Warm up engine to normal operating temperature. Check that

idle speed and ignition timing are within specifications. Then,check CO/HC concentration with a CO/HC meter.

I When measured values are outside specifications, check con-dition of air/fuel ratio feedback in the following steps:

SEF646Y

I Select “HO2S1 MNTR (B1)”, “HO2S1 MNTR (B2)” indata monitor mode.

I Run engine at approximately 2,000 rpm, and confirmthat “RICH” and “LEAN” are displayed alternately.

SAT652J

I Check by heated oxygen sensor monitor mode. (Referto “Self-diagnosis function/self-diagnosis operation pro-cedure” on EC-7.)

I Bring and keep engine speed at approximately 2,000rpm constantly. Under this condition, confirm if MILblinks 5 times or more within 10 seconds.

NOTE:Air/fuel ratio feedback control is also performed at idle.However, raise engine speed and then check.

INSPECTION OF IDLE SPEED, IGNITION TIMING,AND AIR/FUEL RATIO QR20DE

EC-20

OutlineIf connector of electric throttle control or ECM is disconnected,perform throttle valve closed position learning after repair. This isbecause closed throttle position (throttle position sensor outputvalue when throttle is fully-closed) needs to be learned. Also, ifelectric throttle control or ECM is replaced, vehicle system mustlearn minimum required idle air volume requirement. Thus, afterreplacing any of these components, it is necessary to performthrottle valve closed position learning and idle air volume learning.Note that idle air volume learning is equivalent to idle-based speedadjustment by conventional IAS (Idle Adjust Screw).

Throttle Valve Closed Position LearningI Turn ignition switch from ON to OFF. (After turning ignition

switch OFF, keep the status for approximately 5 seconds.)I At this time, confirm that throttle valve operates. (Operation

sound is heard.)I The above operation completes learning process.CAUTION:Closed position learning cannot be executed by CONSULT-II.

SEF452Y

SEF454Y

Idle Air Volume LearningI Complete throttle valve closed position learning.I Warm-up engine and transaxle to normal operating

temperature. (Coolant temperature is approximately 70to 99°C)

I Set selector lever to P or N position. Make sure thatengine is free of electrical loads, such as air conditioner,power steering pump, and other electrical components.

I Touch “START” at “IDLE AIR VOL LEARN” of work supportmode.

CAUTION:I It takes approximately 20 seconds to complete the learn-

ing. Do not turn ignition switch OFF during the process.I When learning is completed, “DONE” is displayed.I Confirm that learning is completed by “IDL A/V LEARN” on

data monitor mode.Learning completed: DONELearning not completed: YET

I Confirm that ignition timing and idle speed are within specifi-cations.

I When ignition timing or idle speed is outside specifications,perform idle air volume learning again.

I Complete throttle valve closed position learning.I Warm up engine and transaxle to normal operating tem-

perature (coolant temperature is 70 to 99°C).I Set selector lever to “P” or “N” position. Make sure that

engine is free of electrical load, such as air conditioner,power steering pump, and other electrical components.

I To start idle air volume learning, refer to the following.

THROTTLE VALVE CLOSED POSITION LEARNINGAND IDLE AIR VOLUME LEARNING QR20DE

EC-21

STARTING IDLE AIR VOLUME LEARNING1. Turn ignition switch ON with accelerator pedal released.2. Immediately after turning ignition switch ON (within 3 seconds), fully depress and release accelerator pedal

repeatedly for 5 times within 5 seconds. (Stop the procedure with accelerator fully closed.)3. Fully depress accelerator pedal 7 seconds after releasing pedal, and keep it fully depressed for approxi-

mately 20 seconds. After that, release accelerator pedal within 3 seconds, and start engine. , Idle airvolume learning starts.* After approximately 10 seconds passes, MIL starts blinking, then turns OFF.

4. It takes approximately 20 seconds to complete the learning. Do not turn ignition switch OFF during theprocess.

5. Confirm that idle air volume learning is completed by the followings.I Turn ignition switch OFF, and keep it for approximately 10 seconds or more, then restart.I Confirm that ignition timing and idle speed are within specifications.CAUTION:Measure the time precisely using a watch.

SEC830C

CAUTION:If accelerator pedal position sensor system has any malfunction, idle air volume learning cannot tobe started.

THROTTLE VALVE CLOSED POSITION LEARNINGAND IDLE AIR VOLUME LEARNING QR20DE

Idle Air Volume Learning (Cont’d)

EC-22

PBIA2503J

Quick InspectionI Turn ignition switch ON (engine not running).I Touch “ON” or “INTERMITTENT” in “FUEL PUMP

RELAY” of active test mode.I Pinch fuel hose with fingers and check for pulsation.I Pinch fuel feed hose with fingers just after ignition

switch is turned ON, and during cranking. Hose shallfeel hard and pulsating.

JEC296D

Inspection Using Fuel Pressure GaugeRELEASING FUEL PRESSURE

I Start engine.I Select “FUEL PRESSURE RELEASE” in work support

mode.I Touch “START” and after engine stalls, crank it two or

three times.I Disconnect fuel pump fuse.I Start engine.I After engine stalls, crank it two or three times to con-

sume fuel in fuel line.

INSTALLING FUEL PRESSURE GAUGEI Prepare fuel hose for fuel pressure measurement, and connect

it to fuel pressure gauge.WARNING:Never use the fuel hose connecting method explained here forother purposes except for fuel pressure measurement.CAUTION:I When disconnecting fuel hose, use shop cloth to remove

any fuel leaks.I Regarding connection and disconnection of fuel hose,

perform safely and securely referring to “Intake Manifoldin EM section”.

I Use commercial (genuine) fuel hose for fuel pressuremeasurement.

I Use longer fuel hose for measuring fuel pressure to avoidexcessive tension or force.

PBIA0316J

I Disconnect fuel hose, and connect fuel hose for fuel pressuremeasurement using hose clamp.

CAUTION:I Wipe off oil or foreign objects on insertion part of fuel

hose using shop cloth with gasoline.I Apply gasoline adequately to insertion part of fuel hose.I Insert fuel hose for fuel pressure measurement to the first

spool on fuel tube.I Use genuine hose clamp (Part No. 16439 N4710 or 16439

40U00).I Install fuel hose clamp at the edge of hose (within 1 to 2

mm). Tighten it to specified torque.

FUEL PRESSURE INSPECTION QR20DE

EC-23

PBIA2505J

I Hose clamp tightening torque : 1 - 1.5 N⋅m (0.1 - 0.15 kg-m)I After installing fuel hose for fuel pressure measurement, pull it

by the force of approximately 100 N (10 kg). Make sure thathose does not separated from fuel tube.

I Clear “FUEL PRESSURE RELEASE”.

I Re-install fuel pump fuse.

I Turn ignition switch ON, and make sure that there is no fuelleak.

FUEL PRESSUREI Start engine, and check that fuel pressure is as specified.

Fuel pressure: [MPa (kg/cm 2)]At idle: 0.35 (3.6)

I If vehicle shows poor starting, check fuel pressure of fuel pumpfor approximately 1 second after ignition switch is turned ONand at cranking.

Fuel pressure: [MPa (kg/cm 2)]One second after ignition switch is turned ON and atcranking: 0.35 (3.6)

CAUTION:I Start engine, and make sure that there is no fuel leak.I While measuring fuel pressure, make sure that no fuel

leaks from connection of fuel hose every 3 minutes.When fuel pressure is NG (outside specifications)Too high: Malfunctioning fuel pressure regulator, clogged fuel

return line, and/or bent hoseToo low: Malfunctioning fuel pressure regulator, poor fuel pump

discharge, clogged fuel supply line, and/or clogged fuelfilter.

CAUTION:Also check fuel pressure at increased engine speed.

FUEL PRESSURE INSPECTION QR20DE

Inspection Using Fuel Pressure Gauge (Cont’d)

EC-24

SBIA0094E

I Select “INJ PULSE-B1” on data monitor mode. Startengine and increase engine speed to approximately2,000 rpm.

I Release accelerator pedal, and confirm that injection pulsedrops to approximately 0.4 to 0.7 msec for a moment.

INSPECTION OF FUEL CUT-OFF FUNCTIONS QR20DE

EC-25

Circuit Diagram

SEC295D

ECM INPUT/OUTPUT SIGNAL REFERENCE VALUE QR20DE

EC-26

ECM Terminal Layout

ECD0864D

TerminalNo. Description Terminal

No. Description

1 Heated oxygen sensor heater control signal (No. 2, 3 cyl.) 57 —2 Heated oxygen sensor heater control signal (No. 1, 4 cyl.) 58 Sensor ground3 — 59 (-) ECM ground4 — 60 (-) ECM ground5 — 61 —6 — 62 Crankshaft position sensor (POS) signal7 — 63 Vehicle speed signal8 — 64 Accelerator pedal position sensor 2 power supply9 — 65 Sensor power supply10 Fuel pump relay control signal 66 Battery power supply11 — 67 Power steering oil pressure sensor signal12 ECM power supply (counter electromotive current return circuit) 68 —13 EVAP canister purge volume control valve control signal 69 —14 — 70 —15 — 71 Camshaft position sensor (PHASE) signal16 — 72 Mass air flow sensor signal17 — 73 Throttle position sensor 1 signal18 Malfunction indicator lamp 74 Throttle position sensor 2 signal19 — 75 Accelerator pedal position sensor 1 signal20 ECM relay control signal 76 Accelerator pedal position sensor 2 signal21 No. 1 cyl. ignition signal (power transistor drive signal) 77 —22 No. 2 cyl. ignition signal (power transistor drive signal) 78 —23 No. 3 cyl. ignition signal (power transistor drive signal) 79 —24 No. 4 cyl. ignition signal (power transistor drive signal) 80 Mass air flow sensor ground25 — 81 Camshaft position sensor (PHASE) signal26 Air conditioner relay control signal 82 Knock sensor signal27 — 83 Refrigerant pressure sensor signal28 — 84 Intake air temperature sensor signal29 — 85 —30 Air conditioner cut signal of refrigerant pressure 86 Accelerator pedal position sensor 2 ground31 — 87 —32 Engine coolant temperature output signal 88 —33 CAN communication line H 89 —34 CAN communication line L 90 Accelerator pedal position sensor output signal (to TCM)35 — 91 Heated oxygen sensor signal (No. 2, 3 cyl.)36 Tachometer drive signal 92 Heated oxygen sensor signal (No. 1, 4 cyl.)37 Cooling fan relay control signal 93 Engine coolant temperature sensor signal38 Snow mode switch signal (2WD A/T) 94 —39 — 95 —40 Brake switch signal 101 No. 1 cyl. injector drive signal41 Ignition switch (START) signal 102 No. 2 cyl. injector drive signal

42 (IGN) Ignition switch (IGN) signal 103 No. 3 cyl. injector drive signal43 Park/Neutral position switch signal 104 No. 4 cyl. injector drive signal44 Air conditioner switch signal 105 —45 — 106 Injector ground46 — 107 Intake valve timing control solenoid valve control signal47 — 108 Injector ground48 — 109 ECM power supply49 — 110 —50

(KLINE) K-line (ECM data transmission/receipt) 111 ECM power supply

51 — 112 Throttle control motor relay control signal52 Rear window defogger switch signal 113 Electric throttle control actuator power supply53 Headlamp switch signal 114 Electric throttle control actuator drive signal 1 (open signal)54 — 115 Electric throttle control actuator ground55 Blower fan switch signal 116 Electric throttle control actuator drive signal 2 (close signal)56 —

The contents in ( ) next to terminal numbers indicate symbols of data link connector.


EC-27

PBIA2507J

Measurement Values from Oscilloscope andCircuit TesterI Measurement voltages, obtained by a circuit tester, and

sample waveforms, obtained by an oscilloscope, for each ter-minal of ECM are shown below.

Measurement data will vary depending on variation of parts as wellas many other factors (vehicle history, driving conditions, environ-mental conditions, maintenance status, measuring instrument/method, etc.). The data below are reference values.

ECD0864D

TerminalNo.

Signal name At idle At approx. 2,000 rpm

1Heated oxygen sensorheater control signal (No.2, 3 cyl.)

Approx. 8.4V

PBIA2533J

+

(Approx. 3,600 rpm or higher: Battery voltage)

2Heated oxygen sensorheater control signal (No.1, 4 cyl.)

Approx. 8.4V

PBIA2533J

+

(Approx. 3,600 rpm or higher: Battery voltage)

10Fuel pump relay controlsignal

For 1 second after ignition switch turned ON:Approx. 1V

After the period above: Battery voltageAt cranking: Approx. 1V

At idle: Approx. 1V

Approx. 1V

12ECM power supply(counter electromotivecurrent return circuit)

Battery voltage +


EC-28

TerminalNo. Signal name At idle At approx. 2,000 rpm

13EVAP canister purge vol-ume control valve controlsignal

Air conditioner OFF: Battery voltageAir conditioner ON: Battery voltage , Approx.

10V(After approx. 20 seconds)(Duty ratio: Approx. 20%)

PBIA2508JWaveform when air conditioner is ON.

Approx. 10V(Duty ratio: Approx. 30%)

PBIA2509J

18 Malfunction indicatorlamp (MIL)

MIL OFF: Battery voltageMIL ON: Approx. 0.1V +

20 ECM relay control signalApprox. 1V

For 3 seconds after ignition switch turnedOFF: Battery voltage

+

21222324

Ignition signal (powertransistor drive signal)

At cranking: Approx. 0.2V

At idle: Approx. 0.1V

Approx. 0.1V

26 Air conditioner relay con-trol signal

Air conditioner ON: Approx. 0.2VAir conditioner OFF: Battery voltage +

30 Refrigerant pressure airconditioner cut signal

Air conditioner switch ONI Compressor running: Approx. 0VI Compressor not running: Approx. 4.6V

+

32

Engine coolant tempera-ture gauge output signal(To combination metercontrol unit and auto airconditioner amp.)

At coolant temperature of approx. 40°:Approx. 7.6 to 8.6V

SKIA0056JAt coolant temperature of approx. 90°:

Approx. 8.4 to 9.4V

+


Measurement Values from Oscilloscope andCircuit Tester (Cont’d)

EC-29

TerminalNo.

Signal name At idle At approx. 2,000 rpm

33CAN communication lineH

Approx. 2.4V (Varies depending on communi-cation status.)

PBIA0159J

+

34CAN communication lineL

Approx. 2.2V (Varies depending on communi-cation status.)

PBIA0160J

+

36 Tachometer drive signal

Approx. 4.8V

PBIA2510J

Approx. 4.8V

PBIA2511J

37Cooling fan relay controlsignal

Fan stopped: Battery voltageFan running: Approx. 0.1V

+

38Snow mode switch (2WDA/T models)

Snow mode switch ON: Battery voltageSnow mode switch OFF: Approx. 0V

+

40 Brake switch signalBrake pedal not depressed: Approx. 0VBrake pedal depressed: Battery voltage

+

41Ignition switch (START)signal

Approx. 0V (When ignition switch is in STARTposition: Battery voltage)

+

42 (IGN)Ignition switch (IGN) sig-nal

Ignition switch OFF: Approx. 0VIgnition switch ON: Battery voltage

+

43Park/Neutral positionswitch signal

N or P position: Approx. 0VOther than above: Approx. 5.0V

+

44Air conditioner switch sig-nal

Air conditioner switch OFF: Approx. 4.6VAir conditioner switch ON: Approx. 0V

+

50(KLINE)

K-line (ECM datatransmission/receipt)

CONSULT-II connected:Approx. 6.6V to battery voltage

CONSULT-II not connected: Approx. 6V+

52Rear window defoggerswitch signal

Rear window defogger switch OFF:Approx. 0V

Rear window defogger switch ON:Battery voltage

+

53 Headlamp switch signalLighting switch OFF: Approx. 0V

Lighting switch ON: Battery voltage+

55 Blower fan switch signalBlower fan switch OFF: Approx. 4.6V

Blower fan switch ON: Approx. 0V+

58 Sensor ground Approx. 0V +



EC-30


59

ECM ground Approx. 0V +60

(−)

62 Crankshaft position sen-sor (POS) signal


PBIA0526JAt idle: Approx. 3V

PBIA0527J

Approx. 3.0V

PBIA0528J

63 Vehicle speed signal Approx. 5V or approx. 0V (vehicle stopped)

Running at approx. 40 km/h: Approx. 2.3V

PBIA2512J

64 Accelerator pedal positionsensor 2 power supply Approx. 2.5V +

65 Sensor power supply Approx. 5V +

66 Battery power supply Battery voltage +

67 Power steering oil pres-sure sensor signal

Keeping steering wheel straight ahead:Approx. 0.5V

Turning steering wheel: Approx. 0.5 - 4V+

7181

Camshaft position sensor(PHASE) signal


At idle: Approx. 1.5 - 2.0V

Approx. 2.0V



EC-31


72 Mass airflow sensor sig-nal

Ignition switch ON: Approx. 1.1V

Approx. 1.5VAt cranking: Approx. 1.4V

At idle: Approx. 1.3V

73 Throttle position sensor 1signal

Approx. 0.6VNote: When ignition switch is ON (Engine is

not running.)Accelerator pedal released: Approx. 0.75VAccelerator pedal fully depressed: Approx.

0.75V

Approx. 0.7V

74 Throttle position sensor 2signal



4.35V

Approx. 4.4V

75 Accelerator pedal positionsensor 1 signal



4.2V

Approx. 0.65V

76 Accelerator pedal positionsensor 2 signal


not running.)Accelerator pedal released: Approx. 0.3V

Accelerator pedal fully depressed: Approx. 2V

Approx. 0.35V

80 Mass air flow sensorground Approx. 0V +

82 Knock sensor signal

Approx. 0 - 2V(Note): Measurement values will vary depend-

ing on measurement range (internalresistance) of circuit tester. The higher

the range, the higher the voltage.

+

83 Refrigerant pressure sen-sor signal

Approx. 1.3V(Voltage becomes higher when air conditioner

refrigerant pressure increases.)+

84 Intake air temperature(IAT) sensor signal

Intake air temperature is approx. 20°C:Approx. 3.5V

Intake air temperature is approx. 80°C:Approx. 1.2V

+

86 Accelerator pedal positionsensor 2 ground Approx. 0V +

90Accelerator pedal positionsensor output signal(To CVT C/U)



4.2V

Approx. 0.7V

91 Heated oxygen sensorsignal (No. 2, 3 cyl.)

Approx. 0.1 to 0.4V + Changes betweenapprox. 0.6 to 0.9V.

PBIA2513J

Approx. 0.1 to 0.4V + Changes betweenapprox. 0.6 to 0.9V.

PBIA2514J

92 Heated oxygen sensorsignal (No.1, 4 cyl.)



EC-32


93 Engine coolant tempera-ture sensor signal

At coolant temperature of approx. 20°:Approx. 3.5V

At coolant temperature of approx. 80°:Approx. 1.2V

+

101102103104

Injector drive signal


At idle: Battery voltage

Slightly lower than battery voltage

106108 Injector ground Approx. 0V +

107Intake valve timing con-trol solenoid valve controlsignal

Battery voltage

Approx. 9 to 11V (at rapid engine racing)

Note: Measurement data will vary dependingon engine speed or load.

109111 ECM power supply Battery voltage +

112 Throttle control motorrelay control signal Approx. 1V +

113Electric throttle controlactuator (throttle controlmotor) power supply

Battery voltage +

114

Electric throttle controlactuator (throttle controlmotor) drive signal 1(open signal)

Approx. 0 - 0.15V +

115Electric throttle controlactuator (throttle controlmotor) ground

Approx. 0V +

116

Electric throttle controlactuator (throttle controlmotor) drive signal 2(close signal)

Approx. 0 - 2.6V +



EC-33

SEC740C

PBIA0586J

InspectionEVAP CANISTERI Visually check exterior for cracks and damage.I If air is blown from B, check whether air comes out smoothly

from A and C.I If air does not come out, replace EVAP canister.

EVAP CANISTER PURGE VOLUME CONTROL VALVE

ECQ1680D

CHECK VALVEI Blow air from fuel tank side.

Air flows to engine side with considerable resistance.I Blow air from engine side.

Air flows smoothly to fuel tank side.I If check valve does not operate as above, replace it.

INSPECTION OF EVAPORATIVE EMISSION CONTROLSYSTEM QR20DE

EC-34

SEF921W

PBIA2531J

PCV (Positive Crankcase Ventilation) ValveINSPECTIONI Run engine at idle and disconnect positive crankcase ventila-

tion valve with hose from rocker cover.I Check that hissing noise is heard from air passage of valve.

This noise indicates that valve operates normally.

PBIA0588J

I Check air flow through valve by blowing and sucking air to/fromintake manifold side.

When blown: BlockedWhen sucked: Flows

KBIA0217J

REMOVAL AND INSTALLATION1. Set aside harnesses around positive crankcase ventilation

valve.2. Remove blow-by hose.3. Remove positive crankcase ventilation valve.

INSPECTION OF POSITIVE CRANKCASE VENTILATIONSYSTEM QR20DE

EC-35

Date post:	25-Nov-2014
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