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Instrumentation, Message Center and Warning Chimes
Principles of Operation
NOTE: The smart junction box (SJB) is also known as the generic electronic module (GEM).
The instrument cluster, message center and warning chimes use both hardwired and controller area network (CAN) circuits to transmit and receive information. As a technician it is very important to understand:
� where the input (command) originates from.
� all the information (messages) necessary in order for a feature to operate.
� which module(s) receive(s) the input or command message.
� does the module which received the input (message) control the output of the feature, or does it output a message over the CAN circuits to another module.
� which module controls the output of the feature.
Instrument Cluster
The instrument cluster (IC) contains an analog speedometer, tachometer, fuel gauge, and engine coolant temperature gauge. The instrument cluster (IC) receives the information over the controller area network (CAN) circuits.
Instrument Cluster Configuration
When installing a new instrument cluster (IC), it is necessary to upload the module configuration information to the scan tool. Following installation of the instrument cluster (IC), download the module configuration information from the scan tool into the new instrument cluster (IC). Refer to Section 418-00.
The following items are configurable:
� All wheel drive (AWD)
� Compass
� Anti-lock brake system/traction control/stability assist (ABS/TC)
� Low coolant warning indicator
� Speedometer bias
� Climate control type
� Oil life threshold
� Default language
Instrument Cluster Prove-Out
The instrument cluster (IC) carries out a display prove-out to verify that the warning/indicator lamps and monitored systems are operating correctly. When the ignition switch is turned to the ON position, the charging system, the low oil pressure, and the malfunction indicator lamps (MIL) illuminate until the engine is started and operating normally.
Each time the ignition switch is turned from off to on, the following instrument cluster (IC) warning indicators prove out:
� Air bag (6 seconds)
� ABS (3 seconds)
� Brake (3 seconds)
� Low coolant level (3 seconds)
� Low fuel (3 seconds)
� Low washer fluid (3 seconds)
� Safety belt (60 seconds or until the safety belt is buckled)
� Traction control (3 seconds)
� Anti-theft (3 seconds)
� Powertrain malfunction (wrench) indicator (3 seconds)
� Check fuel cap (3 seconds)
Engine Coolant Temperature Gauge
The powertrain control module (PCM) receives the engine coolant temperature status through hardwired circuitry to the engine coolant temperature (ECT) sensor. The instrument
413-01 Instrumentation, Message Center, and Warning Chimes 2007 Five Hundred/Freestyle/Montego
DIAGNOSIS AND TESTING Procedure revision date: 04/28/2006
Special Tool(s)
73III Automotive Meter105-R0057 or equivalent
Vehicle Communications Module (VCM) and Integrated Diagnostic System (IDS) software with appropriate hardware, or equivalent scan tool
Flex Probe Kit105-R025C or equivalent
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cluster (IC) receives the engine coolant temperature data from the PCM over the communication network. The instrument cluster (IC) monitors the engine coolant temperature data received from the PCM and commands the engine coolant temperature gauge pointer.
Fuel Gauge
The fuel gauge informs the driver of the amount of fuel remaining in the tank. The fuel tank is a saddle tank design with variable resistance senders, driven by floats, that provide resistances related to fuel height, in each side of the tank, to the instrument cluster (IC). The fuel level input is provided independently from each fuel level sensor. The fuel level sensors provide variable resistance between 15 ohms ± 2 ohms (empty tank) and 160 ohms ± 4 ohms (full tank). If the fuel level is low, the resistance in the fuel level sensor is low, causing the gauge to indicate empty (E). When the fuel level is high, the resistance in the fuel level sensor is high, and the gauge indicates full (F).
The instrument cluster (IC) uses 4 different operating modes to calculate the fuel level:
� Anti-slosh (default mode)
� Key OFF fueling
� Key ON fueling
� Recovery
After a fuel fill up, the time for the fuel gauge to move from empty (E) to full (F) ranges from 2 seconds to 55 minutes depending on which operating mode the fuel gauge is in.
The default fuel gauge mode is called the anti-slosh mode. To prevent fuel gauge changes from fuel slosh (gauge instability due to changes in fuel sender readings caused by fuel moving around in the tank), the fuel gauge takes approximately 55 minutes to go from empty (E) to full (F).
The key OFF fueling mode (2 seconds to read empty [E] to full [F]) requires 3 conditions be met:
� The key must be in the OFF position throughout the entire refueling of the vehicle.
� At least 15% of the vehicle's fuel capacity must be added to the fuel tank.
� The instrument cluster (IC) must receive a valid key ON fuel sender reading within 1 second of the key being put into the RUN position. The key ON sample readings are considered valid if the fuel sender reading is between 15 ohms ± 2 ohms and 160 ohms ± 4 ohms.
If these conditions are not met, the fuel gauge stays in the anti-slosh mode, which results in a slow to read full (F) event.
The key ON fueling mode (approximately 90 seconds to read empty [E] to full [F]) requires 3 conditions be met:
� The transmission is in PARK (P).
� The key is in the RUN position.
� At least 15% of the vehicle's fuel capacity must be added to the fuel tank.
In key ON fueling mode, a 30-second timer activates after the transmission is put into the PARK (P) position. When the 30-second time has elapsed and at least 15% of the vehicle's fuel capacity has been added, the fuel gauge response time is 90 seconds to read from empty (E) to full (F). When the transmission is shifted out of PARK (P), the fuel gauge strategy reverts to the anti-slosh mode. The key ON fueling mode prevents slow to read full events from happening if the customer refuels the vehicle with the key in the RUN position.
Recovery mode is incorporated into the instrument cluster (IC) strategy to recover from a missing fuel level input during a refueling event. Missing fuel level inputs result from intermittent opens in the fuel sender or its circuits. Recovery mode (empty [E] to full [F] approximately 20 minutes) is initiated when the following 2 conditions are met:
� The instrument cluster (IC) is in the anti-slosh (default) mode.
� The actual fuel level in the tank is greater than what is being displayed by the fuel gauge.
Speedometer
The instrument cluster (IC) receives the vehicle speed data from the PCM over the communication network and commands the speedometer pointer according to the vehicle speed data received.
The PCM calculates vehicle speed from the transmission output shaft speed (OSS) sensor input and from the tire size and axle ratio configuration in the vehicle identification (VID) block of the PCM. The PCM provides the instrument cluster (IC) with the vehicle speed sensor (VSS) signal over the high speed controller area network (HS-CAN) communication bus.
Tachometer
The instrument cluster (IC) receives the tachometer data from the PCM over the communication network and commands the tachometer pointer between 0 and 7,000 rpm, according to the data.
Air Bag
The air bag warning indicator is used to provide a status of the supplemental restraint system (SRS). The instrument cluster (IC) receives a message from the restraints control module (RCM) over the communication network. If an air bag system concern is detected, a diagnostic trouble code (DTC) is logged and the RCM sends a message to the instrument cluster (IC) to turn on the air bag warning indicator.
Anti-Lock Brake System (ABS)
The ABS warning indicator informs the driver of a malfunction in the ABS system. Inputs are provided by the ABS module over the communication network.
Brake System
The brake warning indicator alerts the driver if any of the following brake system conditions are present: the parking brake is set, the brake fluid level is low, the ABS module has detected a base brake system failure, there has been a loss of communication between the instrument cluster (IC) and the smart junction box (SJB), and there has been a loss of communication between the instrument cluster (IC) and the ABS module.
Charging System
The PCM constantly monitors the generator regulator output. When the PCM detects a continuous high or low output signal, or when the ignition switch is on and the engine is off, the PCM sends a message over the communication network to the instrument cluster (IC) to illuminate the charging system warning indicator. When the ignition switch is in the ON position, with the engine running, and the PCM determines that the set point for the regulator has been met, the PCM sends a message to the instrument cluster (IC) to turn off the charging system warning indicator.
Low Fuel
The low fuel warning indicator is controlled by the instrument cluster (IC) and warns the driver when the fuel level is approximately 1/8 of a tank or lower.
Low Oil Pressure
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The oil pressure switch is hardwired to the SJB. When there is low or no oil pressure, the SJB sends a message over the communication network to the instrument cluster (IC) to illuminate the low oil pressure warning indicator according to engine oil pressure.
Safety Belt
The safety belt warning indicator informs the driver that the safety belt and/or the front passenger's safety belt is unbuckled. The first 65 seconds after the ignition switch transitions from OFF or ACC to RUN or START, the safety belt warning indicator and the associated chime are used as a reminder to the driver that the front row safety belts are not buckled. In this first 65 seconds the indicator illuminates when the driver and/or front passenger safety belt is unbuckled (with a person in the seat) and turns off whenever the safety belt(s) in the occupied front row seat(s) is buckled. The indicator re-illuminates if a safety belt is unbuckled after both are buckled and the 65 seconds has not yet expired. After 65 seconds, the indicator turns off regardless of the front row safety belts status.
Check Fuel Cap
The PCM monitors pressure in the fuel evaporative system and detects massive or critical losses of pressure. When a critical loss of pressure in the fuel evaporative system is detected, the PCM provides a message over the communication network and the instrument cluster (IC) illuminates the check fuel cap warning indicator.
Traction Control
The traction control indicator flashes when the traction control is in active mode and is being controlled by the ABS module or the all wheel drive control module. The instrument cluster (IC) receives the traction control signal from the ABS module or the 4X4 control module (also known as the differential electronic module [DEM]) through the communication network. The instrument cluster (IC) monitors the traction control and the all wheel drive signal, and when the ABS module or the all wheel drive module detects a concern, the instrument cluster (IC) illuminates the traction control indicator.
Malfunction Indicator Lamp (MIL)
The MIL is illuminated when a DTC is detected by the PCM. The instrument cluster (IC) receives the MIL data from the PCM through the communication network.
Anti-Theft
The anti-theft indicator provides an indication in the ignition switch OFF position that there is an anti-theft system in the vehicle. When the ignition switch is in the ON position, the anti-theft indicator indicates whether or not a concern is detected with the anti-theft system by illuminating the indicator for 60 seconds (solid or flashing) and then flashing a fault code 10 times. The indicator is controlled by the PCM via hardwired circuits.
Door Ajar
The door ajar indicator informs the driver that one or more doors, the decklid, or the liftgate is open while the ignition switch is in RUN position. When a door, decklid, or the liftgate is ajar, the SJB sends a message to the instrument cluster (IC) to turn on the door ajar indicator.
Low Coolant Level
The low coolant warning indicator, located in the degas bottle, illuminates when a low coolant level is detected. The SJB receives the information from the low coolant level switch and sends the instrument cluster (IC) a message over the communication network to turn on the low coolant warning indicator.
Low Washer Fluid
The low washer fluid indicator, located in the windshield washer fluid reservoir, illuminates when a low washer fluid level is detected. The SJB receives the information from the low washer fluid level switch and sends the instrument cluster (IC) a message over the communication network to turn on the low washer fluid indicator.
Powertrain Malfunction (Wrench) Indicator
The instrument cluster (IC) receives the powertrain malfunction (wrench) warning indicator status from the powertrain control module (PCM) for the electronic throttle control (ETC) concerns and the transmission control module (TCM) for transaxle concerns over the communication network. When a system concern is detected, the PCM or the TCM sets a DTC and sends the instrument cluster (IC) a command signal to illuminate the powertrain malfunction (wrench) warning indicator.
Speed Control
The instrument cluster (IC) receives the speed control data from the PCM through the communication network. When the speed control is engaged, the PCM provides a signal to the instrument cluster (IC) to turn on the speed control indicator.
High Beam
When the high beams are turned on, the SJB sends a signal to the instrument cluster (IC) through the communication network to illuminate the high beam indicator.
Turn Signal
The SJB sends a message to the instrument cluster (IC) over the communication network when the multifunction switch is in the RH and LH TURN position. When the multifunction switch is in the RH or LH TURN position, the instrument cluster (IC) flashes the RH or LH turn indicators.
Information And Message Center
The message center is part of the instrument cluster (IC). The message center electronic functions use both hardwired and controller area network (CAN) circuits to transmit and receive information.
The message center provides the following features:
� Information displays
� Setup displays
� Warning messages
� System check messages
The message center information can be selected through a set of 3 buttons:
� SET
� INFO
� RESET
The message center buttons are located on the steering wheel assembly, behind the steering wheel audio control buttons.
Oil Life and Oil Life Start Value
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The oil life is displayed in percentages and is preset to a maximum of approximately 8,047 km (5,000 miles) or 180 days. The oil life start value is used to increase or decrease the starting point of the oil life. The value can be changed back to the maximum of approximately 8,047 km (5,000 miles) if the value was previously changed or to lower the value by 10% increments down to 30%. Each 10% reduction lowers the oil life in both mileage and the days.
For example, if the oil life start value is lowered to 50%, the maximum mileage is 4,023 km (2,500 miles) or 90 days. The oil life remains at the selected setting (50% in this example) until the driver changes the oil life start value. When the oil life ( not oil life start value) is reset back to 100% following an oil change, the oil life resets to 4,023 km (2,500 miles). For configuration of the oil life and oil life start value, refer to Message Center Configuration in this section.
Information Displays
The information displays are non-timed modes. The selected mode remains on until the driver presses a message center button to change the mode or it is overridden by another mode. The information display modes are:
� Odometer/trip odometer
� Distance to empty
� Average fuel economy
� Fuel used
� Trip elapsed drive time
� Compass
System Check
Selecting this function from the SETUP menu causes the message center to cycle through each of the systems being monitored. For each of the monitored systems, the message center indicates either an OK message or a warning message for 2 to 4 seconds. The system check report is as follows:
� OIL LIFE STATUS/RESET
� DOOR AJAR STATUS
� DRIVER DOOR AJAR STATUS
� PASSENGER DOOR AJAR STATUS
� LEFT REAR DOOR AJAR STATUS
� RIGHT REAR DOOR AJAR STATUS
� LIFTGATE AJAR STATUS
� TRUNK AJAR STATUS
� CHARGING SYSTEM
� BRAKE SYSTEM
� PARK BRAKE STATUS
� WASHER FLUID LEVEL STATUS
� BRAKE FLUID LEVEL
� FUEL LEVEL STATUS
� DTE STATUS
� FUEL CAP STATUS
Warning Messages
The warning messages are single cycle, non-resettable and repetitive. The single cycle warning messages display once whenever the ignition switch is turned to the ON position or a fault occurs in a system, and can be cleared by pressing the RESET button.
The single cycle warning messages are:
� LIFTGATE AJAR
� TRUNK AJAR
� OIL LIFE 0%, CHANGE OIL
� OIL LIFE XX%, CHANGE SOON
� LOW BRAKE FLUID LEVEL
� LOW WASHER FLUID LEVEL
The repetitive warning messages are displayed at a fixed interval whenever the ignition switch is turned to ON or is in the ACC position. To remove a repetitive warning message, press the RESET button. The message reoccurs after 10 minutes or until the warning condition is corrected.
The repetitive warning messages are:
� CHECK CHARGING SYSTEM
� CHECK BRAKE SYSTEM
� LOW FUEL LEVEL
The non-resettable warning messages display whenever the ignition switch is turned to ON and a fault occurs in a system. The fault must be corrected to clear the non-resettable warning messages.
The non-resettable warning messages are:
� DRIVER'S DOOR AJAR
� PASSENGER'S DOOR AJAR
� LEFT REAR DOOR AJAR
� RIGHT REAR DOOR AJAR
� PARK BRAKE ENGAGED
Warning Chimes
Safety Belt Warning Chime
The safety belt warning chime is activated when the ignition switch is in the RUN position and the restraint control module (RCM) detects an unbuckled driver safety belt. The instrument cluster (IC) generates the chime for a duration of 6 seconds or until the safety belt is buckled.
Belt-Minder®
The Belt-Minder® feature supplements the current safety belt warning function. The Belt-Minder® feature is enabled after the current safety belt warning is complete. The Belt-Minder®
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reminds the driver that their safety belt is unbuckled by intermittently sounding a chime and illuminating the safety belt warning indicator in the instrument cluster (IC) once the vehicle speed has exceeded 5 km/h (3 mph). While activated, the Belt-Minder® alternates the chime and indicator from on for 6 seconds, to off for 30 seconds.
NOTE: The Belt-Minder® feature is configurable. Refer to Section 418-01. To configure without using a scan tool, refer to Belt-Minder® Deactivating/Activating in this section.
The Belt-Minder® feature stops when:
� the driver safety belt is buckled.
� the ignition switch is turned to the OFF or ACC position.
� 5 minutes have elapsed since the Belt-Minder® has started.
Air Bag Warning Chime
The air bag warning chime warns the driver that the air bag warning indicator is not working or a fault has occurred by sounding a chime when the ignition switch is in the RUN position for more than 20 seconds. When these conditions exist, the RCM sends a chime request through the communication network to the instrument cluster (IC). The instrument cluster (IC) then activates the warning chime. The warning consists of 5 sets of 5 one second tone bursts. Each set is separated by 5 seconds of silence. The warning is repeated every 30 minutes.
Key-In-Ignition Warning Chime
When the key-in-ignition switch closes, it sends a voltage signal to the instrument cluster (IC), which then sounds a warning chime, provided the ignition switch is in the OFF position and the driver door is open. The instrument cluster (IC) sounds a steady tone, which continues until the key is removed, the ignition switch is rotated to the RUN position, or the driver door is closed.
Headlamps On Warning Chime
The headlamp chime is activated when the instrument cluster (IC) receives the parking lamps on signal from the smart junction box (SJB), the key is out of the ignition, and the driver door is ajar. The warning consists of repeated one-half second bursts and continues to sound until the exterior lamps are turned off, the driver door is closed, or 10 minutes have elapsed, at which time the battery saver turns the exterior lamps off.
Inspection and Verification
1. Verify the customer concern.
2. Visually inspect for obvious signs of mechanical or electrical damage.
Visual Inspection Chart
3. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
4. NOTE: Make sure to use the latest scan tool software release.
If the cause is not visually evident, connect the scan tool to the data link connector (DLC).
5. NOTE: The vehicle communication module (VCM) LED prove-out confirms power and ground from the DLC are provided to the VCM.
If the scan tool does not communicate with the VCM:
� Check the VCM connection to the vehicle.
� Check the scan tool connection to the VCM.
� Refer to Section 418-00, No Power To The Scan Tool, to diagnose no communication with the scan tool.
6. If the scan tool does not communicate with the vehicle:
� Verify the ignition key is in the ON position.
� Verify the scan tool operation with a known good vehicle.
� Refer to Section 418-00 to diagnose no response from the powertrain control module (PCM).
7. Carry out the network test:
� If the scan tool responds with no communication for one or more modules, refer to Section 418-00.
� If the network test passes, retrieve and record the continuous memory DTCs.
8. Clear the continuous DTCs and carry out the self-test diagnostics for the SJB.
9. If the DTCs retrieved are related to the concern, go to the Instrument Cluster (IC) Diagnostic Trouble Code (DTC) Index, the Smart Junction Box (SJB) Diagnostic Trouble Code (DTC) Index, or the Powertrain Control Module (PCM) Diagnostic Trouble Code (DTC) Index. For all other DTCs, refer to Section 419-10.
10. If no DTCs related to the concern are retrieved, GO to Symptom Chart — Instrument Cluster (IC), GO to Symptom Chart — Information And Message Center or GO to Symptom Chart — Warning Chimes.
Instrument Cluster (IC) Diagnostic Trouble Code (DTC) Index
Mechanical Electrical
� Accessory drive belt � Brake fluid level � Engine coolant level � Engine oil level � Fuel tank and lines � Tire pressure � Washer fluid level
� Smart junction box (SJB) fuse(s): 7 (7.5A)20 (7.5A)22 (7.5A)23 (7.5A)
� Bulb(s) � Circuitry � Message center switch � Key-in-ignition switch (part of the ignition switch) � Smart junction box (SJB) � Instrument cluster (IC)
DTC Description Action
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Smart Junction Box (SJB) Diagnostic Trouble Code (DTC) Index
Powertrain Control Module (PCM) Diagnostic Trouble Code (DTC) Index
Instrument Cluster (IC) Self-Diagnostic Mode
B1202 Fuel Sender Circuit Open (sender with fuel pump module)
GO to Pinpoint Test B.
B1204 Fuel Sender Circuit Short To Ground (sender with fuel pump module)
GO to Pinpoint Test B.
B1205 Instrument Cluster (IC) Switch Number 1 Assembly Circuit Failure
GO to Pinpoint Test AC.
B1342 ECU is Defective CLEAR the DTCs. REPEAT the self-test. If DTC B1342 is retrieved again, INSTALL a new instrument cluster (IC). REFER to Instrument Cluster (IC) in this section. TEST the system for normal operation.
B1352 Ignition Key-In Circuit Failure If the key-in-ignition warning chime is inoperative, GO to Pinpoint Test AD.
If the key-in-ignition warning chime always chimes, GO to Pinpoint Test AE.
B1868 Lamp Air Bag Warning Indicator Circuit Failure
CLEAR the DTCs. REPEAT the self-test. If DTC B1868 is retrieved again, INSTALL a new instrument cluster (IC). REFER to Instrument Cluster (IC) in this section. TEST the system for normal operation.
B1870 Lamp Air Bag Warning Indicator Circuit Short to Battery
CLEAR the DTCs. REPEAT the self-test. If DTC B1870 is retrieved again, INSTALL a new instrument cluster (IC). REFER to Instrument Cluster (IC) in this section. TEST the system for normal operation.
B2097 Compass Module Failure GO to Pinpoint Test AA.
B2143 NVM Memory Failure CLEAR the DTCs. REPEAT the self-test. If DTC B2143 is retrieved again, INSTALL a new instrument cluster (IC). REFER to Instrument Cluster (IC) in this section. TEST the system for normal operation.
B2477 Module Configuration Error REFER to Section 418-01.
B2627 Fuel Sender Circuit Open #2 (secondary fuel sender)
GO to Pinpoint Test B.
B2628 Fuel Sender Circuit Short To Ground #2 (secondary fuel sender)
GO to Pinpoint Test B.
B2675 Trip Reset Button Stuck VERIFY that the instrument cluster (IC) bezel is aligned correctly and the SELECT/RESET button is not binding. REPAIR as necessary. If the switch is not binding, INSTALL a new instrument cluster (IC). REFER to Instrument Cluster (IC) in this section. TEST the system for normal operation.
B2879 Fuel Tank Jet Pump Fault GO to Pinpoint Test B.
U1900 CAN Communication Bus Fault —Receive Error
REPAIR all other DTCs first. CLEAR the DTCs. CYCLE the key OFF then ON and wait 10 seconds. REPEAT the self-test.
If DTC U1900 is still present, REFER to Section 418-00.
U2013 Compass Module Not Responding GO to Pinpoint Test AA.
U2023 Fault Received From External Node U2023 is set when a module receives invalid network data from another module with a faulted input. RETRIEVE and REPAIR all non-network DTCs in the PCM and other modules on the network. REFER to Section 419-10 for a list of all DTCs.
All other DTCs
— REFER to Section 419-10.
DTC Description Action
B1482 Wiper Washer Fluid Level Sensor Circuit Short to Ground GO to Pinpoint Test V.
B2479 Brake Park Switch Circuit Short to Ground GO to Pinpoint Test J.
B2678 Low Coolant Sender Failure GO to Pinpoint Test W.
C1125 Brake Fluid Level Sensor Input Circuit Failure GO to Pinpoint Test J.
C1284 Oil Pressure Switch Failure GO to Pinpoint Test D.
All other DTCs — REFER to Section 419-10.
DTC Description Action
P0457 Fuel Fill Cap Off REFER to the Powertrain Control/Emissions Diagnosis (PC/ED) manual.
P0460 Fuel Level Sensor A Circuit REFER to the Powertrain Control/Emissions Diagnosis (PC/ED) manual first.
If sent here from the PC/ED manual, GO to Pinpoint Test B.
P0461 Fuel Level Sensor A Circuit Range/Performance REFER to the Powertrain Control/Emissions Diagnosis (PC/ED) manual first.
If sent here from the PC/ED manual, GO to Pinpoint Test B.
P0462 Fuel Level Sensor A Circuit Low REFER to the Powertrain Control/Emissions Diagnosis (PC/ED) manual first.
If sent here from the PC/ED manual, GO to Pinpoint Test B.
P0463 Fuel Level Sensor A Circuit High REFER to the Powertrain Control/Emissions Diagnosis (PC/ED) manual first.
If sent here from the PC/ED manual, GO to Pinpoint Test B.
P2065 Fuel Level Sensor B Circuit REFER to the Powertrain Control/Emissions Diagnosis (PC/ED) manual first.
If sent here from the PC/ED manual, GO to Pinpoint Test B.
P2066 Fuel Level Sensor B Circuit Range/Performance REFER to the Powertrain Control/Emissions Diagnosis (PC/ED) manual first.
If sent here from the PC/ED manual, GO to Pinpoint Test B.
P2067 Fuel Level Sensor B Circuit Low REFER to the Powertrain Control/Emissions Diagnosis (PC/ED) manual first.
If sent here from the PC/ED manual, GO to Pinpoint Test B.
P2068 Fuel Level Sensor B Circuit High REFER to the Powertrain Control/Emissions Diagnosis (PC/ED) manual first.
If sent here from the PC/ED manual, GO to Pinpoint Test B.
All other DTCs — REFER to the Powertrain Control/Emissions Diagnosis (PC/ED) manual.
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To enter the instrument cluster (IC) self-diagnostic mode, begin with the ignition key in the OFF position. Press and hold the odometer/trip reset button (base cluster) or press and hold the message center RESET button (message center cluster). Turn the key to the RUN position and hold until the display indicates tESt (base cluster) or ENGINEERING TEST MODE (message center cluster), usually within 3 to 5 seconds. Press the RESET button once to advance through each stage of the self-test. To exit the instrument cluster (IC) self-test mode, turn the ignition to the OFF position.
Base Cluster Display
Message Center Cluster Display
Description
tESt ENGINEERING TEST MODE
Initial entry display into the self-test mode.
GAGE GAUGE TEST Carries out the gauge sweep of all gauges, then displays the present gauge values. Also carries out the checksum test on ROM and EE.
All VF pixels illuminated
All VF pixels illuminated Carries out the prove-out of all dot matrix pixels in all characters.
bulb TELLTALE TEST Illuminates all the micro-controlled lamps and LEDs.
PnXXXX Pn XX PART NUMBER XXXX -XX
Return to normal operation of all micro-controlled lamps/LEDs and displays the alpha-numeric prefix and suffix of the instrument cluster (IC).
r XXXX FAIL ROM LEVEL $XXXX Displays the hexadecimal ROM level and type.
nr XXXX ROM LEVEL $XXXX Displays the hexadecimal ROM level and type as stored in the NVM.
EE XX NVM LEVEL $XX Displays the hexadecimal EE level.
dtXXXX MANUFACTURE DATE $XXX
Displays hexadecimal coding of the final manufacturing test date.
CF1 XX - CF3XX B&A CONFIG BYTE 1$XX - 2$XX
Displays hexadecimal of bytes 1-3 (non-message center cluster), displays hexadecimal of bytes 1-2 (message center cluster) of module configuration settings.
dtc XXXX CONTINUOS DTC $XXXX Displays a 16-bit hexadecimal format. DTCs displayed are those detected in continuous operation not during self-test.
E XXX.X VEHICLE SPD XX.X MPH Displays the imperial speed value being inputs in tenths of mph to the instrument cluster (IC), the speedometer indicates the present speed.
XXX.X VEHICLE SPD XX.X KMH Displays the metric speed value being inputs in tenths of kmh to the instrument cluster (IC), the speedometer indicates the present speed.
t XXXX TACHOMETER XXXX RPM
Displays the tachometer value being input in rpm to the instrument cluster (IC), tachometer indicates the present rpm.
F1 XXX FDM FUEL LEVEL XXX RADS
Displays the present FDM fuel level A/D input in decimal.
F1PXXX FDM FUEL %, STATUS XXX
Displays the present FDM fuel level percent status in decimal.
F2 XXX JPM FUEL LVL XXX RADS
Displays the present JPM fuel level percent ratio status in decimal.
F2PXXX JPM FUEL %, STATUS XXX
Displays the present JPM fuel level A/D input in decimal.
FP XXX FUEL LEVEL %, STATUS XXX
Displays the present weighted fuel level percent status in decimal (used by the gauge).
FiXXXX FUEL INT STATUS XX XX Displays the fuel reference type used at the key on in hexadecimal, followed by the FLPS value of the reference in hexadecimal.
XXX C COOLANT TEMP XXX C Displays the last temperature gauge input value from the HS-CAN in degrees C, temperature gauge indicates the present temperature.
odoXXX ODOMETER XXX COUNTS
Displays the odometer input received via the HS-CAN, in decimal.
toXXX.X TRIP ODO XXXX.X Displays the trip odometer value stored in RAM in miles.
bAtXX.X BATTERY XX.X VOLTS Displays the present VBAT A/D reading in volts.
rS -X RUN/START X RUN/START sense circuit check.
rA -X RUN/ACC X RUN/ACC sense circuit check.
iin -X KEY IN SW X Displays the input status of key-in-switch.
dC XXX DIMMING CMD XXX Display of the SJB dimming command in decimal.
dS XX DIMMING STEP XX Display of the instrument cluster (IC) dimming step in decimal.
MC SWITCH XXX A/D CNTS
Displays the present message center switch input A/D counts in decimal.
tCsXXX TC ON/OFF SW XXX A/D CNTS
Displays the present input status of the traction control on/off switch ratio in decimal.
ACr XX AC REQUEST X Displays the input status of AC request switch.
PARK INT SW XXX Displays the present park interlock switch input A/D counts in decimal.
COMPASS INPUT $XX Displays the data being received over the compass network in hexadecimal.
dor XX DOOR STATUS $XX Displays the door ajar status received from the SJB in hexadecimal.
H t XX HL & TURN STATUS $XX Displays the headlamp and turn signal status received from the SJB in hexadecimal.
Ad XX AWD DATA $XX Displays the last AWD indicator command received from the 4x4 control module, this command shares the stability control indicator.
PCXXXX PCM DATA $XXXX Displays the 16-bit hexadecimal value of indicator commands and fuel flow received by the PCM.
trXXXX TRANSMISSION DATA $XXXX
Displays the transmission powertrain malfunction (wrench) indicator, the MIL indicator as commanded by the transmission state, and the PRNDL information received from the traction control module in hexadecimal.
AbXXXX ABS TT DATA $XXXX Displays the status of the indicator commands received from the ABS/TC/IVD module in hexadecimal.
rC XX RESTRAINTS CMDS $XX Displays the status of the air bag, the safety belt indicators, and the safety belt chime commands from the RCM in hexadecimal from the input message.
tt XX SJB TELLTALE STATUS $XX
Displays the telltale status received from the SJB in hexadecimal.
tS XX SJB TURN SIG STATUS Displays the turn signal status received from the SJB in hexadecimal.
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Symptom Charts
$XX
Ch X LAST CHIME SOUNDED X
Displays either the chime last sounded by the instrument cluster (IC), or the chime that is presently sounding. This excludes the trip reset button press chime used to enter the ETM or to scroll through the ETM.
PAd00-PAd09 XXXX
PORT AD00-PORT AD09 $XXXX
Displays the 10-bit hexadecimal values of the ports AD00-AD09 A/D read.
PA XX PORT A $XX Displays the 8-bit hexadecimal value of the port A readings.
Pb XX PORT B $XX Displays the 8-bit hexadecimal value of the port B readings.
PJ XX PORT J$XX Displays the 8-bit hexadecimal value of the port J readings.
PK XX PORT K $XX Displays the 8-bit hexadecimal value of the port K readings.
PL XX PORT L $XX Displays the 8-bit hexadecimal value of the port L readings.
Pnn XX PORT M $XX Displays the 8-bit hexadecimal value of the port M readings.
PP XX PORT P $XX Displays the 8-bit hexadecimal value of the port P readings.
PS XX PORT S $XX Displays the 8-bit hexadecimal value of the port S readings.
Puu XX PORT W $XX Displays the 8-bit hexadecimal value of the port W readings.
GAGE GAUGE TEST Repeats the test display cycle.
Symptom Chart — Instrument Cluster (IC)
Condition Possible Sources Action
� No communication with the instrument cluster (IC) � Powertrain control module (PCM)
� Restraint Control Module (RCM)
� Anti-lock brake system (ABS) module
� Transmission control module (TCM)
� Smart junction box (SJB)
� REFER to Section 418-00.
� Incorrect fuel gauge indication � Circuitry
� Fuel tank and/or lines
� Fuel tank transfer tube
� Fuel pump module
� Fuel level sensor
� Instrument cluster (IC)
� GO to Pinpoint Test B.
� Incorrect temperature gauge indication � PCM
� Instrument cluster (IC)
� GO to Pinpoint Test C.
� The low oil pressure warning indicator is never/always on � Circuitry
� Oil pressure switch
� SJB
� Instrument cluster (IC)
� GO to Pinpoint Test D.
� The speedometer is inoperative � PCM
� Instrument cluster (IC)
� GO to Pinpoint Test E.
� Incorrect speedometer indication � Tire size configuration
� Axle ratio configuration
� PCM concern
� Instrument cluster (IC)
� GO to Pinpoint Test AF.
� The odometer is inoperative � PCM concern
� Instrument cluster (IC)
� GO to Pinpoint Test AG.
� The tachometer is inoperative � PCM
� Instrument cluster (IC)
� GO to Pinpoint Test F.
� The low fuel warning indicator is never/always on � Instrument cluster (IC) � GO to Pinpoint Test G.
� The charging system warning indicator is never/always on � Charging system
� PCM
� Instrument cluster (IC)
� GO to Pinpoint Test H.
� The brake warning indicator is never on � Circuitry
� Parking brake switch
� Brake fluid level switch
� SJB
� ABS module
� Instrument cluster (IC)
� GO to Pinpoint Test I.
� The brake warning indicator is always on � Circuitry
� Parking brake switch
� Brake fluid level switch
� SJB
� ABS module
� Instrument cluster (IC)
� GO to Pinpoint Test J.
� The malfunction indicator lamp (MIL) is never on � PCM
� Instrument cluster (IC)
� GO to Pinpoint Test K.
� The malfunction indicator lamp (MIL) is always on � Circuitry
� PCM
� Instrument cluster (IC)
� REFER to the Powertrain Control/Emissions Diagnosis (PC/ED) manual.
� The safety belt warning indicator is inoperative/does not operate correctly
� RCM
� Instrument cluster (IC)
� GO to Pinpoint Test L.
� The air bag warning indicator is never/always on � RCM
� Instrument cluster (IC)
� GO to Pinpoint Test M.
� The LH turn signal indicator is never/always on � SJB � GO to Pinpoint Test N.
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� Instrument cluster (IC)
� The RH turn signal indicator is never/always on � SJB
� Instrument cluster (IC)
� GO to Pinpoint Test O.
� The high beam indicator is never/always on � SJB
� Instrument cluster (IC)
� GO to Pinpoint Test P.
� The traction control indicator is never/always on � ABS module
� All wheel drive (AWD) system
� Instrument cluster (IC)
� GO to Pinpoint Test Q.
� The anti-lock brake system (ABS) warning indicator is never/always on
� ABS module
� Instrument cluster (IC)
� GO to Pinpoint Test R.
� The speed control indicator is never/always on � PCM
� Instrument cluster (IC)
� GO to Pinpoint Test S.
� The powertrain malfunction (wrench) indicator is never/always on
� PCM
� Instrument cluster (IC)
� GO to Pinpoint Test T.
� The check fuel cap warning indicator is never/always on � PCM
� Instrument cluster (IC)
� GO to Pinpoint Test U.
� The low washer fluid indicator is never/always on � Circuitry
� Washer fluid level switch
� SJB
� Instrument cluster (IC)
� GO to Pinpoint Test V.
� The low coolant level indicator is never/always on � Circuitry
� Low coolant level switch
� SJB
� Instrument cluster (IC)
� GO to Pinpoint Test W.
� The door ajar warning indicator is inoperative/does not operate correctly
� SJB
� Instrument cluster (IC)
� GO to Pinpoint Test X.
� The instrument cluster (IC) is inoperative � Fuse
� Circuitry
� Instrument cluster (IC)
� GO to Pinpoint Test Y.
Symptom Chart — Information And Message Center
Condition Possible Sources
Action
� The message center is not operating correctly � Instrument cluster (IC)
� GO to Pinpoint Test Z.
� The compass is inoperative � Fuse
� Circuitry
� Compass module
� GO to Pinpoint Test AA.
� The compass is inaccurate � Zone setting
� Calibration
� Compass sensor module
� GO to Pinpoint Test AB.
� The message center display is blank � Instrument cluster (IC)
� INSTALL a new instrument cluster (IC). REFER to Instrument Cluster (IC) in this section. TEST the system for normal operation.
� The message center switch does not operate correctly
� Circuitry
� Message center switch
� Clockspring
� Instrument cluster (IC)
� GO to Pinpoint Test AC.
� The distance to empty (DTE)/average fuel economy is inoperative
� Instrument cluster (IC)
� CHECK the operation of the speedometer, the odometer, and the fuel gauge.
� If the speedometer, odometer, or fuel gauge do not operate correctly, GO to Pinpoint Test E (speedometer), GO to Pinpoint Test B (fuel gauge) or GO to Pinpoint Test AG(odometer).
� If the speedometer, odometer, and fuel gauge operate correctly, INSTALL a new instrument cluster (IC). REFER to Instrument Cluster (IC) in this section. TEST the system for normal operation.
� The LIFTGATE AJAR display does not operate correctly
� Instrument cluster (IC)
� CHECK the door ajar warning indicator for correct operation.
� If the door ajar warning indicator does not operate correctly, GO to Pinpoint Test X.
� If the door ajar warning indicator operates correctly, INSTALL a new instrument cluster (IC). REFER to Instrument Cluster (IC) in this section. TEST the system for normal operation.
� The TRUNK AJAR display does not operate correctly
� Instrument cluster (IC)
� CHECK the door ajar warning indicator for correct operation.
� If the door ajar warning indicator does not operate correctly, GO to Pinpoint Test X.
� If the door ajar warning indicator is operating correctly, INSTALL a new instrument cluster (IC). REFER to Instrument Cluster (IC) in this section. TEST the system for normal operation.
� The LOW BRAKE FLUID LEVEL display does not operate correctly
� Instrument cluster (IC)
� CHECK the brake warning indicator for correct operation.
� If the brake warning indicator does not operate correctly, GO to Pinpoint Test I (brake warning indicator never on) or GO to Pinpoint Test J (brake warning indicator always on).
� If the brake warning indicator operates correctly, INSTALL a new instrument cluster (IC). REFER to Instrument Cluster (IC) in this section. TEST the system for normal operation.
� The LOW WASHER FLUID LEVEL display does not operate correctly
� Instrument cluster (IC)
� CHECK the low washer fluid indicator for correct operation.
� If the low washer fluid indicator does not operate correctly, GO to Pinpoint Test V.
� If the low washer fluid indicator operates correctly, INSTALL a new instrument cluster (IC). REFER to Instrument Cluster (IC) in this section. TEST the system for normal operation.
� The CHECK CHARGING SYSTEM display does not operate correctly
� Instrument cluster (IC)
� CHECK the charging system warning indicator for correct operation.
� If the charging system warning indicator does not operate correctly, GO to Pinpoint Test H.
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Pinpoint Tests
Pinpoint Test A: DTC U2023 — Fault Received From External Node
Normal Operation
Instrument cluster (IC) DTC U2023 sets when a specific invalid message (when the ignition switch is in the RUN position) is received from the restraints control module (RCM), the smart junction box (SJB), the powertrain control module (PCM), the anti-lock brake system (ABS) module, or the transmission control module (TCM).
Possible Causes
� If the check charging warning indicator operates correctly, INSTALL a new instrument cluster (IC). REFER to Instrument Cluster (IC) in this section. TEST the system for normal operation.
� The CHECK BRAKE SYSTEM display does not operate correctly
� Instrument cluster (IC)
� CHECK the brake warning indicator for correct operation.
� If the brake warning indicator does not operate correctly, GO to Pinpoint Test I (brake warning indicator never on) or GO to Pinpoint Test J (brake warning indicator always on).
� If the brake warning indicator operates correctly, INSTALL a new instrument cluster (IC). REFER to Instrument Cluster (IC) in this section. TEST the system for normal operation.
� The LOW FUEL LEVEL display does not operate correctly
� Instrument cluster (IC)
� CHECK the low fuel warning indicator for correct operation.
� If the low fuel warning indicator does not operate correctly, GO to Pinpoint Test G.
� If the low fuel warning indicator operates correctly, INSTALL a new instrument cluster (IC). REFER to Instrument Cluster (IC) in this section. TEST the system for normal operation.
� The OIL LIFE display does not operate correctly
� Instrument cluster (IC)
� NOTE: The oil life display is calculated by mileage and time (8,047 km [5,000 miles]/180 days). The counter starts when the vehicle is built. RESET the oil life display, and ADVISE the operator to have the oil changed at the recommended service interval. REFER to the Owner's Literature for additional information.
� CHECK the operation of the speedometer gauge and the odometer display.
� If the gauges do not operate correctly, GO to Pinpoint Test E (speedometer) or GO to Pinpoint Test AG (odometer).
� If the gauges operate correctly, INSTALL a new instrument cluster (IC). REFER to Instrument Cluster (IC) in this section. TEST the system for normal operation.
� The DRIVER'S DOOR, PASSENGER'S DOOR, LEFT REAR DOOR, AND RIGHT REAR DOOR AJAR display does not operate correctly
� Instrument cluster (IC)
� CHECK the door ajar warning indicator for correct operation.
� If the door ajar warning indicator does not operate correctly, GO to Pinpoint Test X.
� If the door ajar warning indicator operates correctly, INSTALL a new instrument cluster (IC). REFER to Instrument Cluster (IC) in this section. TEST the system for normal operation.
� The PARK BRAKE ENGAGED display does not operate correctly
� Instrument cluster (IC)
� CHECK the brake warning indicator for correct operation.
� If the brake warning indicator does not operate correctly, GO to Pinpoint Test I (brake warning indicator never on) or GO to Pinpoint Test J (brake warning indicator always on).
� If the brake warning indicator operates correctly, INSTALL a new instrument cluster (IC). REFER to Instrument Cluster (IC) in this section. TEST the system for normal operation.
Symptom Chart — Warning Chimes
Condition Possible Sources Action
� The safety belt warning chime is inoperative
� Instrument cluster (IC)
� CHECK the safety belt warning indicator operation.
� If the safety belt warning indicator does not operate correctly, GO to Pinpoint Test L.
� If the safety belt warning indicator operates correctly, INSTALL a new instrument cluster (IC). REFER to Instrument Cluster (IC) in this section. TEST the system for normal operation.
� The Belt-Minder® feature does not operate correctly
� Belt-Minder® deactivated
� VERIFY the Belt-Minder® is activated.
� Instrument cluster (IC)
� CHECK the safety belt warning indicator operation.
� If the safety belt warning indicator does not operate correctly, GO to Pinpoint Test L.
� If the safety belt warning indicator operates correctly, INSTALL a new instrument cluster (IC). REFER to Instrument Cluster (IC) in this section. TEST the system for normal operation.
� The key-in-ignition warning chime is inoperative
� Circuitry
� Ignition switch
� Instrument cluster (IC)
� GO to Pinpoint Test AD.
� All the chimes are inoperative � Instrument cluster (IC)
� Smart junction box (SJB)
� CONNECT the scan tool. SELECT the instrument cluster (IC) warning lamps and chime active command and trigger the chimes on.
� If the chimes sound, INSTALL a new SJB. REFER to Section 419-10. TEST the system for normal operation.
� If the chimes do not sound, INSTALL a new instrument cluster (IC). REFER to Instrument Cluster (IC) in this section. TEST the system for normal operation.
� The headlamps on warning chime is inoperative
� Instrument cluster (IC)
� CHECK the operation of the instrument cluster (IC) illumination.
� If the instrument cluster (IC) illumination does not operate correctly, REFER to Section 413-00 to continue diagnosis of the instrument cluster (IC) illumination.
� If the instrument cluster (IC) illumination operates correctly, INSTALL a new instrument cluster (IC). REFER to Instrument Cluster (IC) in this section. TEST the system for normal operation.
� The chime sounds when the driver door is ajar (no key-in-ignition and headlamps off)
� Circuitry
� Ignition switch
� Instrument cluster (IC)
� GO to Pinpoint Test AE.
� The air bag warning chime does not operate correctly
� Restraint control module (RCM)
� Instrument cluster (IC)
� CHECK the operation of the safety belt and air bag warning indicators.
� If the safety belt and air bag warning indicators do not operate correctly, GO to Pinpoint Test L (safety belt warning indicator) or GO to Pinpoint Test M (air bag warning indicator).
� If the safety belt and air bag warning indicators operate correctly, INSTALL a new instrument cluster (IC). REFER to Instrument Cluster (IC) in this section. TEST the system for normal operation.
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� TCM
PINPOINT TEST A : DTC U2023 — FAULT RECEIVED FROM EXTERNAL NODE
A1 REPEAT ON-DEMAND SELF TEST
� Ignition ON.
� Clear the instrument cluster (IC) DTCs and retrieve the continuous DTCs.
Is DTC U2023 retrieved again?
Yes GO to A2.
No The system is operating correctly. The cause may have been caused by a temporary loss of communication from one of the communicating modules.
A2 CHECK FOR OTHER MODULE DTCs
� Carry out the continuous and the on-demand self-tests for the following modules: RCMSJBPCMABSTCM
Are any DTCs present?
Yes REFER to Section 419-10 or the Powertrain Control/Emissions Diagnosis (PC/ED) manual for correct DTC diagnosis.
No GO to A3.
A3 CHECK THE INSTRUMENT CLUSTER (IC) ILLUMINATION OPERATION
� Place the headlamp switch in the PARKING LAMPS ON position.
� While observing the instrument cluster (IC) illumination, use the dimmer switch to increase and decrease the illumination brightness.
Does the instrument cluster (IC) illumination operate correctly?
Yes GO to A4.
No REFER to Section 413-00.
A4 CHECK THE SAFETY BELT WARNING INDICATOR OPERATION
� Verify the safety belt warning indicator operates correctly.
Does the safety belt warning indicator operate correctly?
Yes GO to A5.
No If the safety belt warning indicator does not operate correctly, GO to Pinpoint Test K.
A5 CHECK THE SPEEDOMETER/ODOMETER OPERATION
� Verify the speedometer and the odometer operate correctly.
Do the speedometer and the odometer operate correctly?
Yes GO to A6.
No GO to Pinpoint Test E (speedometer) or GO to Pinpoint Test AG (odometer).
A6 CHECK THE COOLANT TEMPERATURE GAUGE OPERATION
� Verify the coolant temperature gauge operates correctly.
Does the coolant temperature gauge operate correctly?
Yes GO to A7.
No GO to Pinpoint Test C.
A7 CHECK FOR CORRECT TCM OPERATION
� Disconnect the TCM connector.
� Check for: corrosiondamaged pinspushed-out pins
� Connect the TCM connector and make sure it seats correctly.
� Operate the system and verify the concern is still present.
Is the concern still present?
Yes INSTALL a new TCM. REFER to Section 307-01A or Section 307-01B. TEST the system for normal operation.
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
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Pinpoint Test B: Incorrect Fuel Gauge Indication
Refer to Wiring Diagrams Cell 60, Instrument Cluster for schematic and connector information.
NOTE: The fuel pump module is also called the fuel sender.
NOTE: The fuel level sensor is also called the remote fuel sender.
Normal Operation
The fuel tank is a saddle tank design with variable resistance senders, driven by floats, that provide resistances related to fuel height in each side to the instrument cluster (IC). The fuel level is determined using variable resistance fuel sensor units, with an approximate resistance range between 15 ohms ± 2 ohms at empty (E) and 160 ohms ± 4 ohms at full (F). The instrument cluster (IC) sends a signal to the fuel pump module through circuit 29 (YE/WH) and returns through circuit 1843 (BK/OG). The instrument cluster (IC) sends a signal to the fuel level sensor circuit 1356 (LG/VT) and returns through circuit 1357 (LB/YE). The instrument cluster (IC) monitors the resistance readings from the fuel sensors and commands the fuel gauge with a corresponding movement of the pointer. If the instrument cluster (IC) detects the fuel level sensor circuitry is open, the fuel gauge defaults to the fuel pump module value only and the fuel gauge indicates E to 1/2 tank. If the instrument cluster (IC) detects fuel pump module circuitry is open, the fuel gauge defaults to the empty position.
Instrument Cluster (IC) DTCs
PCM DTCs
Possible Causes
� Circuit 29 (YE/WH) open, short to ground or voltage
� Circuit 1356 (LG/VT) open, short to ground or voltage
� Circuit 1357 (LB/YE) open or short to voltage
� Circuit 1843 (BK/OG) open or short to voltage
� Fuel pump module
� Fuel level sensor
� Fuel tank transfer tube
� Fuel lines
� Fuel tank
� Instrument cluster (IC)
DTC Description Fault Trigger Conditions
� B1202 — Fuel Sender Circuit Open A continuous and on-demand DTC that sets in the instrument cluster (IC) if the instrument cluster (IC) detects that the fuel sender is out of range on input circuit 29 (YE/WH) with an open or short to voltage on circuits 29 (YE/WH) or 1843 (BK/OG) for more than 33 seconds. The instrument cluster (IC) defaults the fuel gauge to empty (E), once the instrument cluster (IC) detects a fault and sets DTC B1202.
� B1204 — Fuel Sender Circuit Short to Ground A continuous and on-demand DTC that sets in the instrument cluster (IC) if the instrument cluster (IC) detects that the fuel sender is out of range on input circuit 29 (YE/WH) with short to ground for more than 33 seconds. The instrument cluster (IC) defaults the fuel gauge to empty (E), once the instrument cluster (IC) detects a fault and sets DTC B1204.
� B2627 — Fuel Sender Circuit Open #2 A continuous and on-demand DTC that sets in the instrument cluster (IC) if the instrument cluster (IC) detects that the fuel sender is out of range on input circuit 1356 (LG/VT) with an open or short to voltage for more than 33 seconds. The instrument cluster (IC) defaults the fuel gauge to empty (E), once the instrument cluster (IC) detects a fault and sets DTC B2627.
� B2628 — Fuel Sender Circuit Short to Ground #2 A continuous and on-demand DTC that sets in the instrument cluster (IC) if the instrument cluster (IC) detects that the fuel sender is out of range on input circuit 1356 (LG/VT) with short to ground for more than 33 seconds. The instrument cluster (IC) defaults the fuel gauge to empty (E), once the instrument cluster (IC) detects a fault and sets DTC B2628.
NOTE: Normal operation of the fuel delivery system allows the remote side of the fuel tank (the side opposite of the fuel filler hose) to have less fuel than the side with the fuel pump module (side with the fuel filler hose).
B2879 — Fuel Tank Jet Pump Fault
Sets when the instrument cluster (IC) detects a large discrepancy in the amount of fuel (based on input from the fuel senders) between both sides of the fuel tank.
DTC Description Fault Trigger Conditions
� P0460 — Fuel Level Sensor A Circuit Sets when the PCM determines the value of the fuel level input signal is stuck, that the fuel level input signal does not change or does not correspond with the calculated fuel usage.
� P0461 — Fuel Level Sensor A Circuit Range/Performance
Sets when the PCM determines the fuel level input signal repeatedly moves in and out of range, exceeding the minimum or maximum allowable calibrated parameters for a specified fuel fill percentage in the fuel tank.
� P0462 — Fuel Level Sensor A Circuit Low
Sets in the PCM when the PCM detects a short to ground on the fuel pump module signal circuit based on the messaged input received from the instrument cluster (IC).
� P0463 — Fuel Level Sensor A Circuit High
Sets in the PCM when the PCM detects an open or a short to voltage on the fuel pump module signal circuit based on the messaged input received from the instrument cluster (IC).
� P2065 — Fuel Level Sensor B Circuit Sets when the PCM determines the value of the fuel level sensor input signal is stuck, that the fuel level input signal does not change or does not correspond with the calculated fuel usage.
� P2066 — Fuel Level Sensor B Circuit Range/Performance
Sets when the PCM determines the fuel level sensor input signal repeatedly moves in and out of range, exceeding the minimum or maximum allowable calibrated parameters for a specified fuel fill percentage in the fuel tank
� P2067 — Fuel Level Sensor B Circuit Low
Sets in the PCM when the PCM detects a short to ground on the fuel level sensor signal circuit based on the messaged input received from the instrument cluster (IC).
� P2068 — Fuel Level Sensor B Circuit High
Sets in the PCM when the PCM detects a open or short to voltage on the fuel level sensor signal circuit on the messaged input received from the instrument cluster (IC).
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PINPOINT TEST B : INCORRECT FUEL GAUGE INDICATION
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
B1 CARRY OUT THE INSTRUMENT CLUSTER (IC) FUEL GAUGE ACTIVE COMMAND USING THE SCAN TOOL
� Ignition ON.
� Enter the following diagnostic mode on the scan tool: Instrument Cluster (IC) Active Command.
� Trigger the instrument cluster (IC) on-demand self-test while observing the fuel gauge.
Does the fuel gauge sweep from E (empty) to F (full)?
Yes GO to B2.
No GO to B18.
B2 CHECK FOR INSTRUMENT CLUSTER (IC) DTCs
� Ignition OFF.
� Check for recorded instrument cluster (IC) DTCs from the continuous and on-demand self-tests.
Are any DTCs recorded?
Yes For DTC B1204 or B2628, GO to B3.For DTC B1202, GO to B5.For DTC B2627, GO to B10.For DTC B2879, GO to B15.
No GO to B15.
B3 CHECK THE FUEL SENDER FOR A SHORT TO GROUND
NOTE: The fuel pump module is also called the fuel sender.
NOTE: The fuel level sensor is also called the remote fuel sender.
� Disconnect: Fuel Pump Module C3104 (DTC B1204) or Fuel Level Sensor C3270 (DTC B2628).
� Ignition ON.
� NOTE: DTC B1204 or B2628 may still be present.
Repeat the instrument cluster (IC) on-demand self-test.
Is DTC B1202 or B2627 retrieved?
Yes GO to B4.
No INSTALL a new fuel sender in question. REFER to Section 310-01. CLEAR the DTCs. REPEAT the self-test.
B4 CHECK CIRCUIT 29 (YE/WH) (DTC B1204) OR CIRCUIT 1356 (LG/VT) (DTC B2628) FOR A SHORT TO GROUND
� Ignition OFF.
� Disconnect: Instrument Cluster (IC) C220.
� Measure the resistance between the instrument cluster (IC) C220-14 (DTC B1204), circuit 29 (YE/WH) harness side and ground; or between the instrument cluster (IC) C220-16 (DTC B2628), circuit 1356 (LG/VT) harness side and ground.
Is the resistance greater than 10,000 ohms?
Yes GO to B18.
No REPAIR the circuit in question. CLEAR the DTCs. REPEAT the self-test.
B5 CHECK THE FUEL PUMP MODULE CIRCUITRY FOR A SHORT TO VOLTAGE
� Disconnect: Instrument Cluster (IC) C220.
� Ignition ON.
� Measure the voltage between the instrument cluster (IC) C220-14, circuit 29 (YE/WH), harness side and ground; and between the instrument cluster (IC) C220-15, circuit 1843, (BK/OG), harness side and ground.
Is any voltage present?
Yes GO to B6.
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No GO to B7.
B6 CHECK THE FUEL PUMP MODULE FOR A SHORT TO VOLTAGE
� Ignition OFF.
� Disconnect: Fuel Pump Module C3104.
� Ignition ON.
� Measure the voltage between the instrument cluster (IC) C220-14, circuit 29 (YE/WH), harness side and ground; and between the instrument cluster (IC) C220-15, circuit 1843, (BK/OG), harness side and ground.
Is any voltage present?
Yes REPAIR the circuit in question. CLEAR the DTCs. REPEAT the self-test.
No INSTALL a new fuel pump module. REFER to Section 310-01. CLEAR the DTCs. REPEAT the self-test.
B7 CHECK THE FUEL PUMP MODULE CIRCUITRY FOR AN OPEN
� Ignition OFF.
� Disconnect: Fuel Pump Module C3104.
� Connect a fused (5A) jumper wire between the fuel pump module C3104-2, circuit 29 (YE/WH), harness side and the fuel pump module C3104-1, circuit 1843 (BK/OG), harness side.
� Measure the resistance between the instrument cluster (IC) C220-14, circuit 29 (YE/WH), harness side and the instrument cluster (IC) C220-15, circuit 1843 (BK/OG), harness side.
Is the resistance less than 5 ohms?
Yes REMOVE the jumper wire. GO to B8.
No REMOVE the jumper wire. GO to B9.
B8 CHECK THE FUEL PUMP MODULE FOR AN OPEN
NOTE: The fuel sender resistance varies from 15 ± 2 ohms when empty (E) to 160 ± 4 ohms when full (F).
� Measure the resistance between the fuel pump module C3104 pin 1, component side and the fuel pump module C3104 pin 2, component side.
Is the resistance between 15 and 160 ohms?
Yes GO to B18.
No INSTALL a new fuel pump module. REFER to Section 310-01. CLEAR the DTCs. REPEAT the self-test.
B9 CHECK CIRCUIT 29 (YE/WH) FOR AN OPEN
� Measure the resistance between the instrument cluster (IC) C220-14, circuit 29 (YE/WH), harness side and the fuel pump module C3104-2, circuit 29 (YE/WH), harness side.
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Is the resistance less than 5 ohms?
Yes REPAIR circuit 1843 (BK/OG) for an open. CLEAR the DTCs. REPEAT the self-test.
No REPAIR circuit 29 (YE/WH). CLEAR the DTCs. REPEAT the self-test.
B10 CHECK THE FUEL LEVEL SENSOR CIRCUITRY FOR A SHORT TO VOLTAGE
� Disconnect: Instrument Cluster (IC) C220.
� Ignition ON.
� Measure the voltage between the instrument cluster (IC) C220-16, circuit 1356 (LG/VT), harness side and ground; and between the instrument cluster (IC) C220-17, circuit 1357 (LB/YE), harness side and ground.
Is any voltage present?
Yes GO to B11.
No GO to B12.
B11 CHECK CIRCUIT 1356 (LG/VT) FOR A SHORT TO VOLTAGE
� Ignition OFF.
� Disconnect: Fuel Level Sensor C3270.
� Measure the voltage between the instrument cluster (IC) C220-16, circuit 1356 (LG/VT), harness side and ground.
Is any voltage present?
Yes REPAIR circuit 1356 (LG/VT). CLEAR the DTCs. REPEAT the self-test.
No REPAIR circuit 1357 (LB/YE) for a short to voltage. CLEAR the DTCs. REPEAT the self-test.
B12 CHECK THE FUEL LEVEL SENSOR FOR AN OPEN
NOTE: The fuel sender resistance varies from 15 ± 2 ohms when empty (E) to 160 ± 4 ohms when full (F).
� Ignition OFF.
� Disconnect: Fuel Level Sensor C3270.
� Measure the resistance between the fuel level sensor C3270 pin 1, component side and the fuel level sensor C3270 pin 4, component side.
Is the resistance between 15 and 160 ohms?
Yes GO to B13.
No INSTALL a new fuel level sensor. REFER to Section 310-01. CLEAR the DTCs. REPEAT the self-test.
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� Connect a fused (5A) jumper wire between the fuel level sensor C3270-4, circuit 1356 (LG/VT), harness side and the fuel level sensor C3270-1, circuit 1357 (LB/YE), harness side.
� Measure the resistance between the instrument cluster (IC) C220-16, circuit 1356 (LG/VT), harness side and the instrument cluster (IC) C220-17, circuit 1357 (LB/YE), harness side.
Is the resistance less than 5 ohms?
Yes REMOVE the jumper wire. GO to B18.
No REMOVE the jumper wire. GO to B14.
B14 CHECK CIRCUIT 1356 (LG/VT) FOR AN OPEN
� Measure the resistance between the instrument cluster (IC) C220-16, circuit 1356 (LG/VT), harness side and the fuel sender C3270-4, circuit 1356 (LG/VT), harness side.
Is the resistance less than 5 ohms?
Yes REPAIR circuit 1357 (LB/YE) for an open. CLEAR the DTCs. REPEAT the self-test.
No REPAIR circuit 1356 (LG/VT). CLEAR the DTCs. REPEAT the self-test.
B15 INSPECT THE FUEL TANK
� Visually inspect the fuel tank for any damage or deformation.
Is the fuel tank OK?
Yes GO to B16.
No INSTALL a new fuel tank. REFER to Section 310-01. CLEAR the DTCs. REPEAT the self test.
B16 INSPECT THE FUEL TANK TRANSFER TUBE CONNECTIONS
� Remove the fuel pump module and the fuel level sensor. Refer to Section 310-01.
� Inspect the fuel tank transfer tube, connections, the fuel pump module and the fuel level sensor for any damage or deformation.
Are the fuel tank transfer tube, connections, the fuel pump module and the fuel level sensor OK?
Yes GO to B17.
No INSTALL a new fuel tank transfer tube, fuel pump module or fuel level sensor as necessary. REFER to Section 310-01. CLEAR the DTCs. REPEAT the self test.
B17 CHECK THE FUEL PUMP MODULE AND THE FUEL LEVEL SENSOR FOR CORRECT OPERATION
NOTE: The resistance varies from 15 ± 2 ohms when empty (E) to 160 ± 4 ohms when full (F).
� For the fuel pump module, measure the resistance between the fuel pump module C3104 pin 1, component side and the fuel pump module C3104 pin 2, component side while slowly moving the float arm from the bottom to the top of travel.
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Pinpoint Test C: Incorrect Temperature Gauge Indication
Normal Operation
The engine coolant temperature (ECT) sensor unit monitors the coolant temperature and is hardwired directly to the powertrain control module (PCM). The status of the engine coolant temperature is sent from the PCM to the instrument cluster (IC) over the communication network.
Possible Causes
� PCM
� Instrument cluster (IC)
� For the fuel level sensor, measure the resistance between the fuel level sensor C3270 pin 1, component side and the fuel level sensor C3270 pin 4, component side while slowly moving the float arm from the bottom to the top of travel.
Does the resistance start at approximately 15 ohms with the float at the bottom of travel and slowly increase to approximately 160 ohms at the top of travel?
Yes INSTALL a new fuel tank transfer tube. REFER to Section 310-01. CLEAR the DTCs. REPEAT the self test.
No INSTALL a new fuel pump module or fuel level sensor as necessary. REFER to Section 310-01. CLEAR the DTCs. REPEAT the self-test.
B18 CHECK FOR CORRECT INSTRUMENT CLUSTER (IC) OPERATION
� Disconnect the instrument cluster (IC) connector.
� Check for: corrosiondamaged pinspushed-out pins
� Connect the instrument cluster (IC) connector and make sure it seats correctly.
� Operate the system and verify the concern is still present.
Is the concern still present?
Yes INSTALL a new instrument cluster (IC). REFER to Instrument Cluster (IC) in this section. TEST the system for normal operation.
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.
PINPOINT TEST C : INCORRECT TEMPERATURE GAUGE INDICATION
C1 RETRIEVE THE RECORDED DTCs FROM BOTH THE CONTINUOUS AND ON-DEMAND PCM SELF-TESTS
� Check for recorded PCM DTCs from the continuous and on-demand self-tests.
Are any PCM DTCs recorded?
Yes REFER to the Powertrain Control/Emissions Diagnosis (PC/ED) manual.
No GO to C2.
C2 CARRY OUT THE INSTRUMENT CLUSTER (IC) COOLANT TEMPERATURE GAUGE ACTIVE COMMAND USING THE SCAN TOOL
� Ignition ON.
� Enter the following diagnostic mode on the scan tool: Instrument Cluster (IC) Active Command.
� Select the instrument cluster (IC) temperature gauge active command. Trigger the temperature gauge active command on. Observe the temperature gauge. The temperature gauge should start at cold (C) and move to full hot (H).
Does the temperature gauge pointer sweep correctly?
Yes GO to C3.
No GO to C4.
C3 CHECK FOR CORRECT PCM OPERATION
� Disconnect all the PCM connectors.
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Pinpoint Test D: The Low Oil Pressure Warning Indicator Is Never/Always On
Refer to Wiring Diagrams Cell 60, Instrument Cluster for schematic and connector information.
Normal Operation
The oil pressure switch is a normally open switch that is hardwired to the smart junction box (SJB) through circuit 1308 (BN/OG). When the oil pressure is within normal ranges, the oil pressure switch closes, grounding the signal to the SJB. The SJB then sends a command signal to the instrument cluster (IC) through the communication network, to turn off the oil pressure warning indicator. When engine oil pressure is low, the oil pressure switch opens, removing the ground to the SJB. The SJB sends a low oil pressure command to the instrument cluster (IC) through the communication network to illuminate the oil pressure warning indicator.
DTC C1284 — sets if circuit 1308 (BN/OG) is shorted to ground, with the engine off, during the self-test.
Possible Causes
� Circuit 1308 (BN/OG) open or short to ground
� Oil pressure switch
� SJB
� Instrument cluster (IC)
� Check for: corrosiondamaged pinspushed-out pins
� Connect all the PCM connectors and make sure they seat correctly.
� Operate the system and verify the concern is still present.
Is the concern still present?
Yes INSTALL a new PCM. REFER to Section 303-14. TEST the system for normal operation.
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
C4 CHECK FOR CORRECT INSTRUMENT CLUSTER (IC) OPERATION
� Disconnect the instrument cluster (IC) connector.
� Check for: corrosiondamaged pinspushed-out pins
� Connect the instrument cluster (IC) connector and make sure it seats correctly.
� Operate the system and verify the concern is still present.
Is the concern still present?
Yes INSTALL a new instrument cluster (IC). REFER to Instrument Cluster (IC) in this section. TEST the system for normal operation.
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
PINPOINT TEST D : THE LOW OIL PRESSURE WARNING INDICATOR IS NEVER/ALWAYS ON
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
D1 CARRY OUT THE INSTRUMENT CLUSTER (IC) WARNING LAMPS AND CHIME COMMAND USING THE SCAN TOOL
NOTE: Verify the oil level is at or near the FULL level.
� Ignition ON.
� Enter the following diagnostic mode on the scan tool: Instrument Cluster (IC) Active Command.
� Select the instrument cluster (IC) warning lamps and chime active command. Trigger the all lamps active command on and off. Observe the low oil pressure warning indicator.
Does the low oil pressure warning indicator illuminate when triggered on, and turn off when triggered off?
Yes GO to D2.
No GO to D7.
D2 MONITOR THE SJB OIL PRESSURE PID
� Ignition OFF.
� Disconnect: Oil Pressure Switch C103.
� Ignition ON.
� Enter the following diagnostic mode on the scan tool: SJB Oil Pressure Switch PID.
� Monitor the SJB oil pressure switch PID.
� Connect a fused (5A) jumper wire between the oil pressure switch C103-1, circuit 1308 (BN/OG), harness side and ground.
Does the SJB oil pressure switch PID indicate NO pressure with the jumper wire removed and YES with the jumper wire connected?
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Yes REMOVE the jumper wire. GO to D3.
No If the oil pressure indicator is never on, REMOVE the jumper wire. GO to D5.If the oil pressure indicator is always on, REMOVE the jumper wire. GO to D4.
D3 CARRY OUT THE ENGINE OIL PRESSURE TEST
� Carry out the engine oil pressure test. Refer to Section 303-00.
Is the engine oil pressure within specification?
Yes INSTALL a new oil pressure switch. REFER to Section 303-01. CLEAR the DTCs. REPEAT the self-test.
No REFER to Section 303-00.
D4 CHECK CIRCUIT 1308 (BN/OG) FOR AN OPEN
� Ignition OFF.
� Disconnect: SJB C2280A.
� Measure the resistance between the SJB C2280A-18, circuit 1308 (BN/OG), harness side and the oil pressure switch C103-1, circuit 1308 (BN/OG), harness side.
Is the resistance less than 5 ohms?
Yes GO to D6.
No REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
D5 CHECK CIRCUIT 1308 (BN/OG) FOR A SHORT TO GROUND
� Measure the resistance between the SJB C2280A-18, circuit 1308 (BN/OG), harness side and ground.
Is the resistance greater than 10,000 ohms?
Yes GO to D6.
No REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
D6 CHECK FOR CORRECT SJB OPERATION
� Disconnect all the SJB connectors.
� Check for: corrosiondamaged pinspushed-out pins
� Connect all the SJB connectors and make sure they seat correctly.
� Operate the system and verify the concern is still present.
Is the concern still present?
Yes INSTALL a new SJB. REFER to Section 419-10. TEST the system for normal operation.
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.
D7 CHECK FOR CORRECT INSTRUMENT CLUSTER (IC) OPERATION
� Disconnect the instrument cluster (IC) connector.
� Check for: corrosiondamaged pinspushed-out pins
� Connect the instrument cluster (IC) connector and make sure it seats correctly.
� Operate the system and verify the concern is still present.
Is the concern still present?
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Pinpoint Test E: The Speedometer Is Inoperative
Normal Operation
The PCM calculates vehicle speed from the transmission output shaft speed (OSS) sensor input and from the tire size and axle ratio configuration in the vehicle identification (VID) block of the PCM. The PCM provides the instrument cluster (IC) with the vehicle speed sensor (VSS) signal over the high speed controller area network (HS-CAN) communication bus. The instrument cluster (IC) monitors the VSS input from the PCM and commands the speedometer with a corresponding movement of the pointer.
If the vehicle speed data is missing for 5 seconds or less or if the instrument cluster (IC) receives invalid vehicle speed data for 5 seconds or less, the instrument cluster (IC) defaults the speedometer to the last setting, based upon the last known good vehicle speed message. If the instrument cluster (IC) does not receive the vehicle speed data from the PCM for more than 5 seconds, the instrument cluster (IC) sets DTC U1900 in continuous memory and defaults the speedometer to 0 km/h (0 mph). If the vehicle speed data received is deemed invalid by the instrument cluster (IC) for 5 seconds or longer, the instrument cluster (IC) sets DTC U2023 and defaults the speedometer to 0 km/h (0 mph).
Possible Causes
� PCM
� Instrument cluster (IC)
Pinpoint Test F: The Tachometer Is Inoperative
Normal Operation
Engine rpm data is provided to the instrument cluster (IC) by the powertrain control module (PCM) through the communication network.
Possible Causes
� PCM
� Instrument cluster (IC)
Yes INSTALL a new instrument cluster (IC). REFER to Instrument Cluster (IC) in this section. TEST the system for normal operation.
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.
PINPOINT TEST E : THE SPEEDOMETER IS INOPERATIVE
E1 CARRY OUT THE INSTRUMENT CLUSTER (IC) SPEEDOMETER ACTIVE COMMAND USING THE SCAN TOOL
� Ignition ON.
� Enter the following diagnostic mode on the scan tool: Instrument Cluster (IC) DataLogger.
� Select the instrument cluster (IC) speedometer (SPDOMETER) active command and command the speedometer to 0, 193 km/h (120 mph), and back to 0.
Does the speedometer reading start at 0 and move to 193 km/h (120 mph), and return to 0?
Yes GO to E2.
No INSTALL a new instrument cluster (IC). REFER to Instrument Cluster (IC) in this section. TEST the system for normal operation.
E2 RETRIEVE THE RECORDED DTCs FROM THE PCM KEY ON ENGINE OFF (KOEO) SELF-TEST
� Check for recorded PCM DTCs from the KOEO self-test.
Are any PCM DTCs recorded?
Yes REFER to the Powertrain Control/Emissions Diagnosis (PC/ED) manual.
No GO to E3.
E3 RETRIEVE THE RECORDED DTCs FROM THE INSTRUMENT CLUSTER (IC) SELF-TEST
� Check for recorded DTCs from the new instrument cluster (IC) self-test.
Are any DTCs recorded?
Yes For DTC U1900, REPAIR all other DTCs first. CLEAR the DTCs. CYCLE the key OFF then ON and wait 10 seconds. REPEAT the self-test.If DTC U1900 is still present, REFER to Section 418-00.For DTC U2023, RETRIEVE and REPAIR all non-network DTCs in the PCM and other modules on the network. REFER to the Powertrain Control/Emissions Diagnosis (PC/ED) manual.For all other DTCs, REFER to Instrument Cluster Diagnostic Trouble Code (DTC) Index in this section.
No INSTALL a new PCM. REFER to Section 303-14. TEST the system for normal operation.
PINPOINT TEST F : THE TACHOMETER IS INOPERATIVE
F1 CARRY OUT THE INSTRUMENT CLUSTER (IC) TACHOMETER ACTIVE COMMAND USING THE SCAN TOOL
� Ignition ON.
� Enter the following diagnostic mode on the scan tool: Instrument Cluster (IC) Active Command.
� Select the instrument cluster (IC) tachometer active command. Trigger the tachometer on. Observe the tachometer. The tachometer should start at 0 and move to 7,000 rpms.
Does the tachometer pointer sweep correctly?
Yes GO to F2.
No GO to F3.
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Pinpoint Test G: The Low Fuel Warning Indicator Is Never/Always On
Normal Operation
The low fuel indicator is on when the fuel level reaches a predetermined level of approximately 1/8 tank. The low fuel level warning indicator and the fuel gauge are controlled by the instrument cluster (IC) based upon the fuel level data provided by the fuel pump module and the fuel level sender. When the instrument cluster (IC) determines there is approximately 1/8 tank of fuel left, the instrument cluster (IC) illuminates the low fuel warning indicator.
Possible Causes
� Instrument cluster (IC)
F2 CHECK FOR CORRECT PCM OPERATION
� Disconnect all the PCM connectors.
� Check for: corrosiondamaged pinspushed-out pins
� Connect all the PCM connectors and make sure they seat correctly.
� Operate the system and verify the concern is still present.
Is the concern still present?
Yes INSTALL a new PCM. REFER to Section 303-14. TEST the system for normal operation.
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
F3 CHECK FOR CORRECT INSTRUMENT CLUSTER (IC) OPERATION
� Disconnect the instrument cluster (IC) connector.
� Check for: corrosiondamaged pinspushed-out pins
� Connect the instrument cluster (IC) connector and make sure it seats correctly.
� Operate the system and verify the concern is still present.
Is the concern still present?
Yes INSTALL a new instrument cluster (IC). REFER to Instrument Cluster (IC) in this section. TEST the system for normal operation.
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
PINPOINT TEST G : THE LOW FUEL WARNING INDICATOR IS NEVER/ALWAYS ON
G1 CARRY OUT THE INSTRUMENT CLUSTER (IC) WARNING LAMPS AND CHIME ACTIVE COMMAND USING THE SCAN TOOL
� Ignition ON.
� Enter the following diagnostic mode on the scan tool: Instrument Cluster (IC) Active Command.
� Select the instrument cluster (IC) warning lamps and chime active command. Trigger the all lamps active command on and off. Observe the low fuel warning indicator.
Does the low fuel warning indicator illuminate when triggered on and turn off when triggered off?
Yes GO to G2.
No GO to G3.
G2 CHECK THE FUEL GAUGE OPERATION
� Ignition ON.
� Check the fuel gauge.
Does the fuel gauge operate correctly?
Yes GO to G3.
No GO to Pinpoint Test B.
G3 CHECK FOR CORRECT INSTRUMENT CLUSTER (IC) OPERATION
� Disconnect all the instrument cluster (IC) connectors.
� Check for: corrosiondamaged pinspushed-out pins
� Connect all the instrument cluster (IC) connectors and make sure they seat correctly.
� Operate the system and verify the concern is still present.
Is the concern still present?
Yes INSTALL a new instrument cluster (IC). REFER to Instrument Cluster (IC) in this section. TEST the system for normal operation.
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
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Pinpoint Test H: The Charging System Warning Indicator Is Never/Always On
Normal Operation
The charging system warning indicator is controlled by the instrument cluster (IC) based upon data received from the powertrain control module (PCM) over the communication network.
Possible Causes
� Charging system
� PCM
� Instrument cluster (IC)
Pinpoint Test I: The Brake Warning Indicator Is Never On
Refer to Wiring Diagrams Cell 60, Instrument Cluster for schematic and connector information.
Normal Operation
The instrument cluster (IC) uses 2 separate strategies to operate the brake warning indicator. When the parking brake is applied, circuit 1309 (RD/YE) to the smart junction box (SJB) is grounded by the parking brake switch through circuit 1205 (BK). The SJB receives the ground signal and sends the instrument cluster (IC) a message over the communication network to illuminate the brake warning indicator. When the brake fluid level is low or a base brake system concern is detected, the anti-lock brake system (ABS) module sends a signal to the instrument cluster (IC) over the communication network to illuminate the brake system warning indicator.
Possible Causes
� Circuit 1205 (BK) open
� Circuit 1309 (RD/YE) open
� Parking brake switch
� Brake fluid level switch
PINPOINT TEST H : THE CHARGING SYSTEM WARNING INDICATOR IS NEVER/ALWAYS ON
H1 CHECK THE CHARGING SYSTEM
� Check the charging system operation. Refer to Section 414-00.
Is the charging system operating correctly?
Yes GO to H2.
No REFER to Section 414-00.
H2 CARRY OUT THE INSTRUMENT CLUSTER (IC) WARNING LAMPS AND CHIME COMMAND USING THE SCAN TOOL
� Ignition ON.
� Enter the following diagnostic mode on the scan tool: Instrument Cluster (IC) Active Command.
� Select the instrument cluster (I