Instrument Cluster
Refer to Wiring Diagrams Cell 62, Instrument Cluster for schematic and connector information.
Principles of Operation
Speedometer Gauge
The instrument cluster receives the vehicle speed signal from the powertrain control module (PCM) over the SCP network and displays it on the speedometer gauge. If the instrument
cluster receives no vehicle speed signal after one second, the speedometer defaults to 0.0 km/h (0.0 mph).
Fuel Gauge
The instrument cluster receives the fuel level information directly from the fuel sender. When the instrument cluster fails to receive the fuel level signal for more than 33 seconds, then the
fuel level gauge will move below E (empty). If the fuel level signal then operates correctly for more than 33 seconds, the fuel gauge will return to the correct position.
Fuel fills of less than 22.7 liters (6 gallons) require at least 5-20 minutes to update the fuel gauge indication.
Engine Coolant Temperature Gauge
Engine coolant temperature information is received by the instrument cluster from the PCM over the SCP network. Temperatures over 121°C (275°F) will display hot (H). If the engine
coolant temperature data is missing or invalid for five seconds, the instrument cluster will move the engine coolant temperature gauge below the cold (C) position.
Boost Pressure Gauge (Lightning only)
The boost pressure gauge on the instrument cluster receives the boost pressure status directly from the intake manifold. The boost pressure gauge will display three conditions: boost
pressure with acceleration, vacuum pressure at idle, or 0 pressure at consistent engine load and rpm.
Odometer
The instrument cluster receives odometer rolling count status from the PCM and stores the mileage in non-volatile memory (NVM). When the instrument cluster fails to receive the odometer
rolling count status for more than two seconds, the odometer display will show dashes.
Low Oil Pressure Indicator
The low oil pressure indicator on the instrument cluster receives the oil pressure status directly from the oil pressure switch. The two-position oil pressure gauge will display either normal or
no oil pressure. The low oil pressure indicator will prove out when the ignition switch is placed in the START position and then in the RUN position.
Brake Warning Indicator
The BRAKE indicator will prove out when the ignition switch is placed in the START and then in the RUN position. The BRAKE indicator will also be illuminated when the instrument cluster
receives a ground signal from the parking brake switch or the brake fluid level switch.
Safety Belt Indicator
The seat belt switch is hardwired to the generic electronic module (GEM) or central timer module (CTM). The safety belt warning indicator will be illuminated when the GEM/CTM sends a
ground signal to the instrument cluster. The safety belt indicator will prove out when the ignition switch is placed in the START position and then in the RUN position.
Yellow ABS Warning Indicator
The ABS indicator will be illuminated when the anti-lock brake control module sends an open signal to the instrument cluster. The prove out of the ABS indicator is controlled by the anti-lock
brake control module.
Service Engine Soon Indicator
After the engine is started, the SERVICE ENGINE SOON indicator will prove out for a duration of three seconds. If the instrument cluster does not receive a message from the PCM within
five seconds, the instrument cluster will send two messages to the PCM and attempt to reestablish communication. If the instrument cluster is unable to establish communication, the
instrument cluster will illuminate the SERVICE ENGINE SOON indicator and log a diagnostic trouble code (DTC).
High Beam Indicator
The high beam indicator will illuminate when the multifunction switch is in the high beam position and sends a battery signal to the instrument cluster.
Right and Left Turn Indicator
SECTION 413-01A: Instrument Cluster — Conventional 2001 F-150 Workshop Manual
DIAGNOSIS AND TESTING
Procedure revision date: 12/16/2003
Special Tool(s)
Instrument Gauge System Tester
014-R1063 or equivalent
73III Automotive Meter
105-R0057 or equivalent
Worldwide Diagnostic System (WDS)
418-F224,
New Generation STAR (NGS) Tester
418-F052, or equivalent diagnostic tool
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The right and left turn indicators will illuminate when the multifunction switch is in either turn signal position or hazard lamps position and sends a battery signal to the instrument cluster.
Air Bag Indicator
The air bag indicator will be illuminated when the restraint control module (RCM) sends a ground signal to the instrument cluster. The prove out of the air bag indicator is controlled by the
RCM.
Anti-Theft Indicator
The THEFT indicator provides passive anti-theft system (PATS) prove out. The THEFT indicator will prove out for three seconds following the ignition switch cycle and will flash following the
ignition OFF to indicate that PATS is active.
Charging System Indicator
The charging system indicator will be illuminated when the generator sends a ground signal to the instrument cluster.
Speed Control
The speed control (CRUISE) indicator is controlled by the speed control servo and hardwired to the instrument cluster.
4X4 High Indicator
The 4X4 high indicator will be illuminated when the vehicle is in 4X4 high mode and the GEM sends a ground signal to the instrument cluster. The 4X4 high indicator will prove out when the
ignition switch is placed in the START position and then in the RUN position.
Low Range Indicator
The LOW RANGE indicator will be illuminated when the vehicle is in 4X4 low and the PCM sends a message to the instrument cluster via the SCP network. The low range indicator will
prove out when the ignition switch is placed in the START position and then in the RUN position.
Door Ajar Indicator
The door ajar indicator will prove out when the ignition switch is placed in the START position and then in the RUN position. The door ajar indicator will be illuminated when the CTM/GEM
provides a ground signal to the instrument cluster.
Low Fuel Indicator
The low fuel indicator will prove out when the ignition switch is placed in the START position and then in the RUN position. The low fuel indicator will illuminate when the fuel level gets low.
The instrument cluster receives the fuel level information directly from the fuel sender.
Inspection and Verification
1. Verify the customer concern by operating the instrument cluster to duplicate the condition. Observe the indicators, warning displays, and gauges to determine if they are operating
correctly with the ignition switch:
in RUN with the engine off.
in START before the ignition switch is released.
in RUN with the engine running.
2. Visually inspect for obvious signs of mechanical and electrical damage.
Visual Inspection Chart
3. If the inspection reveals obvious concern(s), repair as required.
4. If the cause of the fault is not visually evident, proceed to the diagnostic tool diagnostics.
Diagnostic Tool Diagnostics
1. If the concern remains after the inspection, connect the diagnostic tool to the data link connector (DLC) located beneath the instrument panel and select the vehicle to be tested from
the diagnostic tool menu. If the diagnostic tool does not communicate with the vehicle:
Check that the program card is correctly installed.
Check the connections to the vehicle.
Check the ignition switch position.
2. If the diagnostic tool still does not power up, refer to the diagnostic tool manual.
3. Carry out the diagnostic tool data link test. If the diagnostic tool responds with:
SCP or ISO = all electronic control units no response/not equipped, refer to Section 418-00.
No response/not equipped for hybrid electronic cluster (HEC), GO to Pinpoint Test A.
No response/not equipped for generic electronic module/central timer module (GEM/CTM), GO to Pinpoint Test B.
System passed, retrieve and record the continuous diagnostic trouble codes (DTCs), erase the continuous DTCs and carry out self-test diagnostics for the HEC, and
GEM/CTM.
4. If the DTCs retrieved are related to the concern, go to the Hybrid Electronic Cluster (HEC) Diagnostic Trouble Code (DTC) Index, or the Generic Electronic Module (GEM)/Central
Timer Module (CTM) Diagnostic Trouble Code (DTC) Index to continue diagnostics.
Mechanical Electrical
Low washer fluid level
Fuel tank
Low engine coolant level
Loose or damaged accessory drive belt
Low engine oil level
Parking brake position switch
Brake fluid level
Central junction box (CJB) fuse(s):
2 (5A)
6 (5A)
8 (5A)
15 (5A)
20 (5A)
30 (30A)
Battery junction box (BJB) fuse 103 (50A)
Circuitry
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5. If no DTCs related to the concern are retrieved, proceed to the HEC Dealer Test Mode to continue diagnostics.
Parameter Reset and Key Programming
NOTE: The instrument cluster parameters must be reset upon installation of a new instrument cluster.
NOTE: Both passive anti-theft system (PATS) keys are needed to carry out this procedure.
To reset the instrument cluster parameters and program the keys, complete the following procedure:
1. Connect the diagnostic tool.
2. Select the instrument cluster.
3. Select ENTER SECURITY ACCESS. Wait 10 minutes for security access to be granted.
4. Select PARAMETER RESET.
5. Disconnect the diagnostic tool.
6. Place the first PATS key in the OFF position.
7. Place the key in the ON position.
8. Remove the key.
9. Place the second PATS key in the ON position.
10. Place the key in the OFF position (the programming sequence is complete).
NOTE: If the vehicle fails to start following completion of the parameter reset and key programming sequence, clear the keep alive memory (KAM) by disconnecting the battery for five
minutes. For additional information about the battery disconnect procedure, refer to Section 414-00.
Hybrid Electronic Cluster (HEC) Dealer Test Mode
To enter the HEC Dealer Test Mode, depress and hold the instrument cluster SELECT/RESET button and then turn the ignition switch to the RUN position. Continue pressing the
SELECT/RESET button (five seconds) until tESt is displayed in the odometer. The SELECT/RESET button must be released within three seconds of the odometer displaying tESt to begin
the dealer test mode. Depress the SELECT/RESET button to advance through the following steps until dtc is displayed. Depressing the SELECT/RESET button will display any continuous
DTCs stored before proceeding to the next step.
Odometer
Display Description
GAGE Activates gauge sweep of all gauges, then displays present gauge values. Also carries out the checksum tests on ROM and EE.
All segments
illuminated
Illuminates all odometer segments.
bulb Illuminates all micro-controlled lamps and LEDs (low oil pressure/high coolant temperature, low fuel, service engine soon, brake, low range). INSTALL a new bulb or
LED as necessary.
r Returns to normal operation of all micro-controlled lamps and LEDs and displays hexadecimal value for ROM level (used when requesting assistance from the hotline).
EE Displays hexadecimal value for EE level (used when requesting assistance from the hotline).
dt Displays hexadecimal coding of final manufacturing test date (used when requesting assistance from the hotline).
dtc Displays continuous DTCs. Pressing the SELECT/RESET button will display any DTCs stored before proceeding to the next step.
enG Displays the English speed in mph. Speedometer will indicate present speed within tolerances. Display will show 0 if input is not received, if input received is invalid for
one second or more, or if speed is 0.
m Displays the English speed data (mph) received from the PCM via the SCP network. Displays the metric speed in kph. Speedometer will indicate present speed within
tolerances. Display will show 0 if input is not received, if input received is invalid for one second or more, or if speed is 0.
tAc Displays the tachometer data received from the PCM via the SCP network. Tachometer will indicate present speed within tolerances. Display will show 0 if input is not
received, if input received is invalid for one second or more, or if engine rpm is 0.
FUEL Displays the actual A/D fuel level. The fuel gauge will display a filtered fuel level value. This filter will keep the pointer from moving suddenly or erratically. If the value
displayed is between 0 and 20, the circuit is shorted. GO to Pinpoint Test D.
255=open send +/-0
232=Full stop +/-10
215=Full mark +/-10
178=3/4 mark +/-8
138=1/2 mark +/-7
93=1/4 mark +/-5
41=E mark +/-4
54="LOW FUEL" (0-59)
0-18=short (0-20 max.)
OIL Displays the code (0-255) for the oil pressure switch input to the HEC. Displays the oil pressure reading input to the HEC. Oil pressure gauge will indicate present oil
pressure. Normal oil pressure (greater than 6 psi) will display a value between 000 and 176. A low oil pressure (less than 6 psi) or an inoperative engine oil pressure
switch will display a value greater than 176.
dEGC Display of engine temperature in Degrees C input from cylinder head temperature sensor. If the value displayed is -40C, the SCP message for engine temperature has
not been received for more than 5 seconds. GO to Pinpoint Test E.
49 C="C" mark.
60 C=Normal band start.
120 C=Normal band end.
119 C=Temperature warning indicator ON.
"-40" C=No SCP Message for 5 sec.
br Displays the brake fluid level input to the HEC.
bAtt Displays the code (0-255) battery voltage input to the HEC. Battery voltage gauge will indicate present battery voltage.
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a
Refer to 413-01B (F250 only).
Turn the ignition switch to the OFF position or press and hold the SELECT/RESET button for three or more seconds and release to exit HEC Dealer Test Mode. If no DTCs related to the
concern are retrieved, proceed to the Symptom Chart to continue diagnostics.
Hybrid Electronic Cluster (HEC) Diagnostic Trouble Code (DTC) Index
Hybrid Electronic Cluster (HEC) Parameter Identification (PID) Index
93-102=6.9-9.1 volts (low voltage)
115-124=8.5-10.7 volts (norm band start)
215-225=15.8-18 volts (norm band end)
230-241=16.9-19.1 volts (high voltage)
rhEo Displays the present hexadecimal value for the instrument cluster backlighting pulse width modulated (PWM) input to the HEC (used when requesting assistance from
the hotline).
rhi
rhS
rho
PWM input duty cycle.
SCP hexadecimal dimming step (used when requesting assistance from the hotline).
Output driver counts in hexadecimal format (used when requesting assistance from the hotline).
Cr Displays the present RUN/START sense input. Display will show -L with the ignition switch in the START position and -h with the ignition switch in the RUN position.
ALtF
a
Displays 8-bit hexadecimal value for alternate fuel level. Display will show a value between OO and FF if the message is received.
PA-PE7 Not used.
GAGE Repeats test display cycle.
Diagnostic Tool
Displayed DTC
Dealer Test Mode
Displayed DTC Description Source Action
B1202 9202 Fuel Sender Open HEC GO to Pinpoint Test C.
B1204 9204 Fuel Sender Short to Ground HEC GO to Pinpoint Test C.
B1213 9213 Anti-Theft Number of Programmed Keys is Below
Minimum
HEC REFER to Section 419-01.
B2103 A103 Antenna Not Connected — Defective Transceiver HEC REFER to Section 419-01.
B1317 9317 Battery Voltage High HEC REFER to Section 414-00.
B1318 9318 Battery Voltage Low HEC REFER to Section 414-00.
B1342 9342 ECU Is Defective HEC CLEAR the DTCs. REPEAT the self-test. If DTC B1342, INSTALL a new
instrument cluster. REFER to Instrument Cluster. CLEAR the DTCs.
REPEAT the self-test.
B1356 9356 Ignition RUN Circuit Open HEC GO to Pinpoint Test A.
B1364 9364 Ignition START Circuit Open HEC GO to Pinpoint Test A.
B1600 9600 PATS Ignition Key Transponder Signal Is Not Received
— Damaged Key or Non-PATS Key
HEC REFER to Section 419-01.
B1601 9601 PATS Received Incorrect Key-Code From Ignition Key
Transponder (Unprogrammed Encoded Ignition Key)
HEC REFER to Section 419-01.
B1602 9602 PATS Received Invalid Format Of Key-Code From
Ignition Key Transponder (Partial Key Read)
HEC REFER to Section 419-01.
B1681 9681 PATS Transceiver Signal Is Not Received (Not
Connected, Damaged, or Wiring)
HEC REFER to Section 419-01.
B1232 A103 Antenna Not Connected — Defective Transceiver HEC REFER to Section 419-01.
B2139 A139 PCM ID Does Not Match Between HEC and PCM HEC REFER to Section 419-01.
B2141 A141 NVM Configuration Failure (No PCM ID Exchange
Between Instrument Cluster and PCM)
HEC REFER to Section 419-01.
B2143 A143 Odometer NVM Memory Failure HEC INSTALL a new instrument cluster. REFER to Instrument Cluster. CLEAR
the DTCs. REPEAT the self-test.
C1284 5284 Oil Pressure Switch Failure HEC GO to Pinpoint Test E.
P1197 1197 SELECT/RESET Switch Circuit Failure HEC INSTALL a new instrument cluster. REFER to Instrument Cluster. CLEAR
the DTCs. REPEAT the self-test.
U1011 D011 SCP (J1850) Invalid or Missing Data for Engine Air
Intake
PCM CARRY OUT the PCM self-test.
U1027 D027 SCP (J1850) Invalid or Missing Data for Engine RPM PCM CARRY OUT the PCM self-test.
U1041 D041 SCP (J1850) Invalid or Missing Data for Vehicle Speed PCM CARRY OUT the PCM self-test.
U1073 D073 SCP (J1850) Invalid or Missing Data for Engine
Coolant
PCM CARRY OUT the PCM self-test.
U1123 D123 SCP (J1850) Invalid or Missing Data for Odometer PCM CARRY OUT the PCM self-test.
U1131 D131 SCP (J1850) Invalid or Missing Data for Fuel System AFCM CARRY OUT the PCM self-test.
U1132 D132 SCP (J1850) Invalid or Missing Data for Odometer PCM CARRY OUT the PCM self-test.
U1147 D147 SCP (J1850) Invalid or Missing Data for Vehicle
Security
PCM REFER to Section 419-01.
U1148 D148 SCP (J1850) Invalid or Missing Data for Audio Control PCM CARRY OUT the PCM self-test.
U1262 D262 Missing SCP Message J1850 REFER to Section 418-00.
PID Description Expected Value
CCNT Number of Continuous DTCs in Module one count per bit
PCM_VFY PCM ID Matches Between PCM and HEC NO, YES
NUMKEYS Number of Keys Stored in Module one count per bit
M_KEY Master Key Present notPRE, PRESNT
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Hybrid Electronic Cluster (HEC) Active Command Index
Generic Electronic Module (GEM)/Central Timer Module (CTM) Diagnostic Trouble Code (DTC) Index
ANTISCN Anti-Scan Function DISABL, ENABLE
ENABLE_S Vehicle enable Status DISABL, ENABLE
PCM_ID PCM ID Stored in the HEC notSTR, STORED
VBAT_EC System Battery Voltage Potential notOK, OK
FLDLVLI Brake Fluid Level Input one count per bit
FUELLVL Fuel Level Status %
IGN_O/L Ignition Switch Lock Position NO, YES
IGN_R Ignition Switch - RUN Position NO, YES
IGN_S Ignition Switch - START Position NO, YES
OIL_PSW Oil Pressure Switch Control one count per bit
RFSIGNAL RF OFF, ON
BACK_LT PWM Output %
RESETSW Reset Switch OFF, ON
VBAT Battery Voltage VDC
Active Command Display Action
ANTI-THEFT INDICATOR LAMP THEFT LAMP OFF, ON
SPEEDOMETER CONTROL SPDOMETER %
FUEL GAUGE CONTROL FUELLEVEL %
ENGINE COOLANT GAUGE CONTROL ENGCOOLNT %
TACHOMETER CONTROL TCHOMETER %
INDICATOR LAMP CONTROL MIL OFF, ON
INDICATOR LAMP CONTROL II (Check Gauge Indicator) OFF, ON
INDICATOR LAMP CONTROL II FUEL LOW OFF, ON
4WD TRANSFER CASE CONTROL LOW LAMP OFF, ON
WARNING LAMPS AND CHIME ALL LAMPS OFF, ON
BATTERY VOLTAGE INDICATOR CONTROL BATTERY I %
OIL PRESSURE GAUGE CONTROL OIL GAUGE %
DISPLAY DIMMING CONTROL ILLUMINATE OFF, ON
DISPLAY SEGMENT CONTROL SEGMENTS OFF, ON
DTC Description Source Action
B1302 Accessory Delay Relay Coil Circuit Failure GEM REFER to Section 501-11.
B1304 Accessory Delay Relay Coil Circuit Short to Battery GEM REFER to Section 501-11.
B1313 Battery Saver Relay Coil Circuit Failure GEM/CTM REFER to Section 417-02.
B1315 Battery Saver Relay Coil Circuit Short to Battery GEM/CTM REFER to Section 417-02.
B1317 Battery Voltage High GEM/CTM REFER to Section 414-00.
B1318 Battery Voltage Low GEM/CTM REFER to Section 414-00.
B1322 Driver Door Ajar Circuit Short to Ground GEM/CTM REFER to Section 417-02.
B1323 Door Ajar Lamp Circuit Failure GEM/CTM If lamp is never on, GO to Pinpoint Test J. If lamp is always on, GO to Pinpoint Test K.
B1325 Door Ajar Lamp Circuit Short to Battery GEM/CTM GO to Pinpoint Test J.
B1330 Passenger Door Ajar Circuit Short to Ground GEM/CTM REFER to Section 417-02.
B1340 Chime Input Request Circuit Short to Ground GEM/CTM REFER to Section 413-09.
B1342 ECU Is Defective GEM/CTM CLEAR and DOCUMENT the DTCs. CARRY OUT the instrument cluster self-test. INSTALL a new
instrument cluster if DTC B1342 is retrieved again. REFER to Instrument Cluster.
B1352 Ignition Key-In Circuit Failure GEM/CTM REFER to Section 413-09.
B1355 Ignition Run Circuit Failure GEM/CTM REFER to Section 211-05.
B1359 Ignition Run/Acc Circuit Failure GEM/CTM REFER to Section 211-05.
B1365 Ignition Start Circuit Short to Battery GEM/CTM REFER to Section 211-05.
B1371 Illuminated Entry Relay Circuit Failure GEM/CTM REFER to Section 417-02.
B1373 Illuminated Entry Relay Short to Battery GEM/CTM REFER to Section 417-02.
B1398 Driver Power Window One Touch Window Relay Circuit
Failure
GEM REFER to Section 501-11.
B1400 Driver Power Window One Touch Window Relay Circuit
Short to Battery
GEM REFER to Section 501-11.
B1405 Driver Power Window Down Circuit Short to Battery GEM REFER to Section 501-11.
B1410 Driver Power Window Motor Circuit Failure GEM REFER to Section 501-11.
B1426 Lamp Safety Belt Circuit Short to Battery GEM/CTM GO to Pinpoint Test H.
B1428 Lamp Safety Belt Circuit Failure GEM/CTM If lamp is never on, GO to Pinpoint Test H. If lamp is always on, GO to Pinpoint Test I.
B1431 Wiper Brake/Run Relay Circuit Failure GEM/CTM REFER to Section 501-16.
B1432 Wiper Brake/Run Relay Circuit Short to Battery GEM/CTM REFER to Section 501-16.
B1434 Wiper Hi/Low Speed Relay Coil Circuit Failure GEM/CTM REFER to Section 501-16.
B1436 Wiper Hi/Low Speed Relay Coil Circuit Short to Battery GEM/CTM REFER to Section 501-16.
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Generic Electronic Module (GEM)/Central Timer Module (CTM) Parameter Identification (PID) Index
B1438 Wiper Mode Select Switch Circuit Failure GEM/CTM REFER to Section 501-16.
B1441 Wiper Mode Select Switch Circuit Short to Ground GEM/CTM REFER to Section 501-16.
B1446 Wiper Park Sense Circuit Failure GEM/CTM REFER to Section 501-16.
B1450 Wiper Wash/Delay Switch Circuit Failure GEM/CTM REFER to Section 501-16.
B1453 Wiper Wash/Delay Switch Circuit Short to Ground GEM/CTM REFER to Section 501-16.
B1458 Wiper Washer Pump Motor Relay Circuit Failure GEM/CTM REFER to Section 501-16.
B1460 Wiper Washer Pump Motor Relay Coil Circuit Short to
Battery
GEM/CTM REFER to Section 501-16.
B1462 Safety Belt Switch Circuit Failure GEM/CTM REFER to Section 413-09.
B1466 Wiper Hi/Low Speed Not Switching GEM/CTM REFER to Section 501-16.
B1467 Wiper Hi/Low Speed Circuit Motor Short to Battery CTM REFER to Section 501-16.
B1473 Wiper Low Speed Circuit Motor Failure GEM/CTM REFER to Section 501-16.
B1476 Wiper High Speed Circuit Motor Failure GEM/CTM REFER to Section 501-16.
B1483 Brake Pedal Input Circuit Failure GEM REFER to Section 308-07A.
B1485 Brake Pedal Input Circuit Battery Short GEM REFER to Section 308-07A.
B1577 Lamp Park Input Circuit Short to Battery GEM/CTM REFER to Section 413-09.
B1610 Illuminated Entry Input Short Circuit to Ground GEM REFER to Section 417-02.
B1840 Wiper Front Power Circuit Failure GEM/CTM REFER to Section 501-16.
P0500 Vehicle Speed Sensor Malfunction GEM REFER to Section 308-07A.
P1804 Transmission 4-Wheel Drive High Indicator Circuit
Failure
GEM GO to Pinpoint Test N.
P1806 Transmission 4-
Wheel Drive High Indicator Short Circuit
to Battery
GEM GO to Pinpoint Test N.
P1812 Transmission 4-Wheel Drive Mode Select Circuit
Failure
GEM REFER to Section 308-07A.
P1815 Transmission 4-Wheel Drive Mode Select Short Circuit
to Ground
GEM REFER to Section 308-07A.
P1820 Transmission Transfer Case Clockwise Shift Relay Coil
Circuit Failure
GEM REFER to Section 308-07A.
P1822 Transmission Transfer Case Clockwise Shift Relay Coil
Short Circuit to Battery
GEM REFER to Section 308-07A.
P1824 Transmission 4-Wheel Drive Clutch Relay Circuit
Failure
GEM REFER to Section 308-07A.
P1826 Transmission 4-Wheel Drive Low Clutch Relay Short
Circuit to Battery
GEM REFER to Section 308-07A.
P1828 Transmission Transfer Case Counter Clockwise Shift
Relay Coil Circuit Failure
GEM REFER to Section 308-07A.
P1830 Transmission Transfer Case Counter Clockwise Shift
Relay Coil Short Circuit to Battery
GEM REFER to Section 308-07A.
P1832 Transmission Transfer Case Differential Lock-Up
Solenoid Circuit Failure
GEM REFER to Section 308-07A.
P1834 Transmission Transfer Case Differential Lock-Up
Solenoid Short Circuit to Battery
GEM REFER to Section 308-07A.
P1838 Transmission Transfer Case Shift Motor Circuit Failure GEM REFER to Section 308-07A.
P1846 Transmission Transfer Case Contact Plate 'A' Circuit
Failure
GEM REFER to Section 308-07A.
P1850 Transmission Transfer Case Contact Plate 'B' Circuit
Failure
GEM REFER to Section 308-07A.
P1854 Transmission Transfer Case Contact Plate 'C' Circuit
Failure
GEM REFER to Section 308-07A.
P1858 Transmission Transfer Case Contact Plate 'D' Circuit
Failure
GEM REFER to Section 308-07A.
P1866 Transmission Transfer Case System Concern -
Servicing Required
GEM REFER to Section 308-07A.
P1867 Transmission Transfer Case Contact Plate General
Circuit Failure
GEM REFER to Section 308-07A.
P1876 Transmission Transfer Case 2-Wheel Drive Solenoid
Circuit Failure
GEM REFER to Section 308-07A.
P1877 Transmission Transfer Case 2-Wheel Drive Solenoid
Circuit Short to Battery
GEM REFER to Section 308-07A.
P1891 Transmission Transfer Case Contact Plate Ground
Return Open Circuit
GEM REFER to Section 308-07A.
PID Description Expected Value
2WDSOL 2 Wheel Drive Solenoid Status Off---, OffO-G, On---, On-B-
4WD_SW 4WD Input Switch 2WD, 4WDLOW, 4WDHGH, OPEN, GSHORT
4WDELCL 4WD Electronic Clutch Output Off---, OffO-G, On---, On-B-
4WDHIGH 4WD-Wheel High Output State Off---, OffO-G, On---, On-B-
4WDSOL 4 Wheel Drive Solenoid Status Off---, OffO-G, On---, On-B-
ACCDLY Accessory Delay Relay Circuit Off---, OffO-G, On---, On-B-
BATSAV Battery Saver Relay Circuit Off---, OffO-G, On---, On-B-
BOO Brake Switch Input OFF, ON
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Generic Electronic Module (GEM)/Central Timer Module (CTM) Active Command Index
CCNT Number Of Continuous DTCs In Module one count per bit
CHIMERQ Chime Request OFF, ON
CLTCHSW Trans. Clutch Interlock Sw. notEGD, ENGAGD
D_DN_SW Driver Window Down Switch OFF, DOWN
D_DOOR Left Front Door Ajar Switch CLOSED, AJAR
D_PWAMP Driver Power Window Motor Current AMP
D_PWPK Driver Power Window Peak Current AMP
D_PWRLY Driver Power Window Off---, OffO-G, On---, On-B-
D_SBELT Driver Seat Belt OUT, IN
DRAJR_L Door Ajar Warning Lamp Circuit Off---, OffO-G, On---, On-B-
IGN_A Ignition Switch -ACCY Position NO, YES
IGN_KEY Ignition Key In / Out OUT, IN
IGN_O/L Ignition Switch -OFF/Lock Position NO, YES
IGN_R Ignition Switch -RUN Position NO, YES
IGN_S Ignition Switch -START Position NO, YES
INTLMP Illuminated Entry Relay Circuit Off---, OffO-G, On---, On-B-
MTR_CCW Trans. Xfer Counter Cw Motor Output Off---, OffO-G, On---, On-B-
MTR_CW Trans. Xfer Clockwise Motor Output Off---, OffO-G, On---, On-B-
NTRL_SW Neutral Safety Switch Input notNTL, NTRL
OTD_SW One Touch Down Switch OFF, DOWN
OVERSPD Vehicle Overspeed Warning Status DISABL, ENABLE
P_DOOR Passenger Door Ajar Switch CLOSED, AJAR
PARK_SW Parking Sw OFF, ON
PLATE_A Trans. Xfer Case Contact Plate A OPEN, CLOSED
PLATE_B Trans. Xfer Case Contact Plate B OPEN, CLOSED
PLATE_C Trans. Xfer Case Contact Plate C OPEN, CLOSED
PLATE_D Trans. Xfer Case Contact Plate D OPEN, CLOSED
PLATEPW Trans. Xfer Case Contact Plt Pul Wid Off---, OffO-G, On---, On-B-
SBLTLMP Seat Belt Lamp Circuit Off---, OffO-G, On---, On-B-
SPEEDWP Speed Dependent Wiper Function notACT, ACTIVE
VBAT Battery Voltage Voltage Range
VSS Vehicle Speed KPH
VSS Vehicle Speed Low Resolution (Mph) MPH
WASH_SW Washer Pump Switch OFF, ON
WASHRLY Washer Pump Relay Circuit Off---, OffO-G, On---, On-B-
WPHISP Wiper Two Speed Relay Off---, OffO-G, On---, On-B-
WPMODE Wiper Control Mode Select WASH, OPEN, OFF, INTVL1, INTVL2, INTVL3, INTVL4, INTVL5, INTVL6, INTVL7, LOW, HIGH, ?
WPPK_PK Wiper Park-To-Park Time mS
WPPRKSW Windshield Wiper Park Sense notPRK, PARKED
WPRUN Wiper Run Relay Driver State Off---, OffO-G, On---, On-B-
Active Command Display Action
4WD TRANSFER CASE CONTROL AXLE DSCN OFF, ON
4WD TRANSFER CASE CONTROL AXLE ENGG OFF, ON
4WD TRANSFER CASE CONTROL CW/CCW OFF, ON
4WD TRANSFER CASE CONTROL CW/CCW OFF, ON
4WD TRANSFER CASE CONTROL HIGH LAMP OFF, ON
4WD TRANSFER CASE CONTROL PLATE PWR OFF, ON
4WD TRANSFER CASE CONTROL SHFT CLCH OFF, ON
BATTERY SAVER & COURTESY ENTRY BATT SAVR OFF, ON
BATTERY SAVER & COURTESY ENTRY INT LAMPS OFF, ON
FRONT WINDSHIELD WIPER/WASHER SPEED RLY OFF, ON
FRONT WINDSHIELD WIPER/WASHER WASH RLY OFF, ON
FRONT WINDSHIELD WIPER/WASHER WIPER RLY OFF, ON
MODULE OPTION CONTENT SPD WARN OFF, ON
MODULE OPTION CONTENT SPD WIPER OFF, ON
MODULE SLEEP COMMAND MODULE SLEEP COMMAND OFF, ON
ONE TOUCH WINDOW DOWN & ACCY DELAY ACCY RLY OFF, ON
ONE TOUCH WINDOW DOWN & ACCY DELAY ONE TOUCH OFF, ON
PID LATCH PID LATCH OFF, ON
REAR WIPER DWN RELAY OFF, ON
REAR WIPER UP RELAY OFF, ON
REAR WIPER WASH RLY OFF, ON
WARNING LAMPS AND CHIME AJAR LAMP OFF, ON
WARNING LAMPS AND CHIME CHIME OFF, ON
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Symptom Chart
WARNING LAMPS AND CHIME SBLT LAMP OFF, ON
Symptom Chart
Condition Possible Sources Action
No communication with the hybrid electronic
instrument cluster (HEC) module
Central junction box (CJB) Fuses 2
(5A), 6 (5A), 30 (30A).
Circuitry.
J1850 Communication Network (SCP).
Instrument cluster.
GO to Pinpoint Test A.
No communication with the generic electronic
module (GEM) or central timer module (CTM)
Central junction box (CJB) Fuses 6
(5A), 8 (5A), 15 (5A), and 20 (5A).
Battery junction box (BJB) Fuse 103
(50A).
Circuitry.
Generic electronic module
(GEM)/central timer module (CTM).
GO to Pinpoint Test B.
A single gauge does not return to zero with the
ignition switch off
Instrument cluster.
INSTALL a new instrument cluster. REFER to
Instrument Cluster. TEST the system for normal
operation.
Incorrect fuel gauge indication
Circuitry.
Fuel pump assembly.
Instrument cluster.
Fuel tank.
GO to Pinpoint Test C.
The LOW FUEL warning indicator is never/always
on
Instrument cluster.
Bulb.
GO to Pinpoint Test D.
Incorrect voltage gauge indication
Circuitry.
Generator.
Instrument cluster.
REFER to Section 414-00.
Incorrect oil pressure gauge indication
Circuitry.
Engine oil pressure switch.
Instrument cluster.
GO to Pinpoint Test E.
Oil gauge reads normal with engine off
Instrument cluster.
INSTALL a new instrument cluster. REFER to
Instrument Cluster. CLEAR the DTCs. REPEAT the
self-test.
Low oil level warning indicator stays illuminated;
temperature gauge reads normal
Instrument cluster.
Low or no oil pressure.
Engine oil pressure switch.
Circuitry.
GO to Pinpoint Test E.
Incorrect temperature gauge indication
Circuitry.
Instrument cluster.
Powertrain control module (PCM).
Engine coolant temperature sensor.
GO to Pinpoint Test F.
The temperature warning indicator
flickers/temperature gauge reads fully hot
Instrument cluster.
INSTALL a new instrument cluster. REFER to
Instrument Cluster. CLEAR the DTCs. REPEAT the
self-test.
The speedometer/odometer is inoperative
Circuitry.
Powertrain control module (PCM).
Instrument cluster.
GO to Pinpoint Test G.
The tachometer is inoperative
Instrument cluster.
INSTALL a new instrument cluster. REFER to
Instrument Cluster. CLEAR the DTCs. REPEAT the
self-test.
Incorrect tachometer indication
Instrument cluster.
INSTALL a new instrument cluster. REFER to
Instrument Cluster. CLEAR the DTCs. REPEAT the
self-test.
An indicator is inoperative/always on — low oil
pressure
Instrument cluster.
Bulb.
INSTALL a new instrument cluster. REFER to
Instrument Cluster. CLEAR the DTCs. REPEAT the
self-test.
The safety belt warning indicator is inoperative
(chime is operative)
Circuitry.
Seat belt switch.
Generic electronic module
(GEM)/central timer module (CTM).
Bulb.
Instrument cluster.
GO to Pinpoint Test H.
The safety belt warning indicator does not operate
correctly (chime is operative)
Circuitry.
Seat belt switch.
Generic electronic module
(GEM)/central timer module (CTM).
Instrument cluster.
GO to Pinpoint Test I.
The DOOR AJAR indicator is inoperative (chime is
operative)
Circuitry.
Door ajar switch.
Instrument cluster safety belt warning
indicator bulb.
Generic electronic module
(GEM)/central timer module (CTM).
Instrument cluster.
GO to Pinpoint Test J.
Inaccurate speedometer reading
Circuitry.
Powertrain control module (PCM).
Instrument cluster.
GO to Pinpoint Test G.
The DOOR AJAR indicator does not operate
correctly (chime is operative)
Circuitry.
Door ajar switch.
Generic electronic module
(GEM)/central timer module (CTM).
Instrument cluster.
GO to Pinpoint Test K.
The BRAKE warning indicator is never/always on
Circuitry.
Brake fluid level.
GO to Pinpoint Test L.
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Pinpoint Tests
PINPOINT TEST A: NO COMMUNICATION WITH THE HYBRID ELECTRONIC INSTRUMENT CLUSTER (HEC) MODULE
Parking brake switch.
Fluid level indicator switch.
Bulb.
Instrument cluster.
Anti-lock brake control module (RABS
only).
The charge system warning indicator is
never/always on
Circuitry.
Generator (GEN).
Bulb.
Instrument cluster.
GO to Pinpoint Test M.
The 4X4 indicator lamp is never/always on
Circuitry.
Generic electronic module (GEM).
Bulb.
Instrument cluster.
GO to Pinpoint Test N.
The LOW RANGE indicator lamp is never/always
on
Circuitry.
Powertrain control module (PCM).
Bulb.
Instrument cluster.
REFER to Powertrain Control/Emissions Diagnosis
(PC/ED) manual.
An indicator is inoperative/always on — high beam
Circuitry.
Bulb.
Instrument cluster.
GO to Pinpoint Test O.
An indicator is inoperative/always on — air bag
warning
Circuitry.
Bulb.
Instrument cluster.
RCM.
REFER to Section 501-20B.
An indicator is inoperative/always on — ABS
warning
Circuitry.
Bulb.
Instrument cluster.
ABS module.
GO to Pinpoint Test P.
An indicator is inoperative/always on — SERVICE
ENGINE SOON
Circuitry.
Bulb.
Instrument cluster.
Powertrain control module (PCM).
GO to Pinpoint Test Q.
An indicator is inoperative/always on —
turn/hazard
Circuitry.
Bulb(s).
Instrument cluster.
GO to Pinpoint Test R.
An speed control indicator is never on
Circuitry.
Bulb.
Instrument cluster.
Speed control.
GO to Pinpoint Test S.
The speed control is always on
Circuitry.
Speed control servo.
REFER to Section 310-03.
An indicator is inoperative/always on — THEFT
Circuitry.
LED.
Instrument cluster.
REFER to Section 419-01.
The integrated circuit display is inoperative/erratic
Instrument Cluster.
CARRY OUT HEC Dealer Test Mode.
A gauge is inoperative — boost gauge
Pressure/vacuum line.
Instrument cluster.
GO to Pinpoint Test T.
CONDITIONS DETAILS/RESULTS/ACTIONS
A1 CHECK CIRCUIT 729 (RD/WH) FOR VOLTAGE
Instrument Cluster C236
Measure voltage between instrument cluster C236 pin 10, circuit 729 (RD/WH), harness side and ground.
Is the voltage greater than 10 volts?
Yes
GO to A2.
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No
REPAIR the circuit. TEST the system for normal operation.
A2 CHECK CIRCUIT 1003 (GY/YE) FOR VOLTAGE
Measure the voltage between instrument cluster C236 pin 11, circuit 1003 (GY/YE), harness side and ground.
Is the voltage greater than 10 volts?
Yes
GO to A3.
No
REPAIR the circuit. TEST the system for normal operation.
A3 CHECK CIRCUIT 16 (RD/LG) FOR VOLTAGE
Measure the voltage between instrument cluster C236 pin 2, circuit 16 (RD/LG), harness side and ground.
Is the voltage greater than 10 volts?
Yes
GO to A4.
No
REPAIR the circuit. TEST the system for normal operation.
A4 CHECK CIRCUIT 57 (BK) FOR OPEN
Measure the resistance between instrument cluster C236 pin 1, circuit 57 (BK), harness side and ground.
Is the resistance less than 5 ohms?
Yes
GO to A5.
No
REPAIR the circuit. TEST the system for normal operation.
A5 CHECK CIRCUIT 676 (PK/OG)
Instrument Cluster C237
Measure the resistance between instrument cluster C237 pin 17, circuit 676 (PK/OG), harness side and ground.
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PINPOINT TEST B: NO COMMUNICATION WITH THE MODULE — GENERIC ELECTRONIC MODULE (GEM) OR CENTRAL TIMER MODULE (CTM)
Is the resistance less than 5 ohms?
Yes
REFER to Section 418-00.
No
REPAIR the circuit. TEST the system for normal operation.
CONDITIONS DETAILS/RESULTS/ACTIONS
B1 CHECK THE IGNITION STATES — MONITOR THE GEM/CTM PIDS
GEM
Select the GEM/CTM PID for the ignition switch.
NOTE: If the vehicle is equipped with a manual transmission, depress the clutch pedal when turning the ignition
switch to START.
Monitor the GEM/CTM PID IGN_S, IGN_R, IGN_O/L, IGN_A, while turning the ignition switch through the
START, RUN, OFF and ACC positions.
Do the GEM/CTM PID values agree with the ignition switch positions?
Yes
GO to B2.
No
REPAIR the ignition circuit (RUN/ACC: circuit 297 [BK/LG], RUN: circuit 1040 [RD/LB], START: circuit 32 [RD/LB]
or circuit 481 [GY/YE]) in question. TEST the system for normal operation.
B2 CHECK CIRCUIT 1052 (TN/BK) FOR VOLTAGE
CJB C243
Measure the voltage between CJB C243 pin 11, circuit 1052 (TN/BK), harness side and ground.
Is the voltage greater than 10 volts?
Yes
GO to B3.
No
REPAIR the circuit. TEST the system for normal operation.
B3 CHECK CJB FOR VOLTAGE
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GEM/CTM C267
CJB C243
Measure the voltage between CJB C267 pin 4 (component side), and ground; and between CJB C267 pin 16
(component side), and ground.
Are the voltages greater than 10 volts?
Yes
GO to B4.
No
INSTALL a new CJB. TEST the system for normal operation.
B4 CHECK THE CJB
CJB C243
Measure the resistances between CJB C243 pin 11 (component side), and CJB C267 pin 4 (component side);
and between CJB C243 pin 11 (component side), and CJB C267 pin 16 (component side).
Are the resistances less than 5 ohms?
Yes
GO to B5.
No
INSTALL a new CJB. TEST the system for normal operation.
B5 CHECK CIRCUIT 875 (BK/LB) FOR CONTINUITY TO GROUND
GEM/CTM C239
Measure the resistance between GEM/CTM C239 pin 26, circuit 875 (BK/LB), harness side and ground.
Is the resistance less than 5 ohms?
Yes
GO to B6.
No
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PINPOINT TEST C: INCORRECT FUEL GAUGE INDICATION
REPAIR the circuit. TEST the system for normal operation.
B6 CHECK CIRCUIT 875 (BK/LB) FOR OPEN
Measure the resistance between GEM/CTM C239 pin 14, circuit 875 (BK/LB), harness side and ground.
Is the resistance less than 5 ohms?
Yes
REFER to Section 418-00.
No
REPAIR the circuit. TEST the system for normal operation.
CONDITIONS DETAILS/RESULTS/ACTIONS
C1 CARRY OUT THE INSTRUMENT CLUSTER FUEL GAUGE ACTIVE COMMAND
NOTE: Fuel fills of less than 22.7 liters (6 gallons) require at least 5-20 minutes to update the fuel gauge indication.
HEC
Select the instrument cluster FUEL LEVEL CONTROL active command. Trigger, monitor, and scroll FUELLEVEL
at: 0% , 54%, and 100%.
Does the fuel gauge display: below E with 0%, half with 54%, and full stop with 100%?
Yes
GO to C2.
No
GO to C8.
C2 CHECK THE FUEL GAUGE OPERATION
Fuel Pump Assembly C415
Connect one lead of Instrument Gauge System Tester to the fuel pump assembly C415 pin 2, circuit 29 (YE/WH),
harness side and the other lead of Instrument Gauge System Tester to the fuel pump assembly C415 pin 3,
circuit 396 (BK/OG), harness side.
Set Instrument Gauge System Tester to 160 ohms.
Wait one minute for the gauge to respond.
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Set Instrument Gauge System Tester to 15 ohms.
NOTE: The fuel gauge should read below E (empty mark) when carrying out this test step.
Wait one minute and read the fuel gauge.
Set Instrument Gauge System Tester to 160 ohms.
NOTE: The fuel gauge should read F (full) or above when carrying out this test step.
Wait one minute and read the fuel gauge.
Does the fuel gauge operate correctly?
Yes
GO to C3.
No
GO to C5.
C3 CHECK THE FUEL TANK
Check the fuel tank for any damage or deformation.
Is the fuel tank OK?
Yes
GO to C4.
No
INSTALL a new fuel tank. REFER to Section 310-01A. TEST the system for normal operation.
C4 INSPECT THE FUEL PUMP ASSEMBLY
Check the fuel pump assembly in-tank mounting, float, float rod, wiring and connections for damage or
obstruction.
Are the fuel pump assembly and wiring OK?
Yes
INSTALL a new fuel sender. TEST the system for normal operation.
No
REPAIR or INSTALL a new fuel pump assembly as necessary. TEST the system for normal operation.
C5 CHECK CIRCUIT 29 (YE/WH) FOR SHORT TO POWER
Instrument Cluster C237
Measure the voltage between the instrument cluster C237 pin 3, circuit 29 (YE/WH), harness side and ground.
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PINPOINT TEST D: THE LOW FUEL WARNING INDICATOR IS NEVER/ALWAYS ON
Is any voltage present?
Yes
REPAIR the circuit. TEST the system for normal operation.
No
GO to C6.
C6 CHECK THE FUEL PUMP ASSEMBLY FEED CIRCUIT 29 (YE/WH)
Measure the resistances between instrument cluster C237 pin 3, circuit 29 (YE/WH), harness side and fuel pump
assembly C415 pin 2, circuit 29 (YE/WH), harness side; and between instrument cluster C237 pin 3, circuit 29
(YE/WH), harness side and ground.
Is the resistance less than 5 ohms between the instrument cluster and fuel sender and greater than
10,000 ohms between the instrument cluster and ground?
Yes
GO to C7.
No
REPAIR the circuit. TEST the system for normal operation.
C7 CHECK FUEL SENDING UNIT GROUND CIRCUIT 396 (BK/OG) AND CIRCUIT 676 (PK/OG)
Measure the resistance between instrument cluster C237 pin 17, circuit 676 (PK/OG), harness side and fuel
pump assembly C415 pin 3, circuit 396 (BK/OG), harness side.
Is the resistance less than 5 ohms?
Yes
GO to C8.
No
REPAIR circuit 676 (PK/OG) or circuit 396 (BK/OG) as necessary. TEST the system for normal operation.
C8 CHECK FOR CORRECT INSTRUMENT CLUSTER OPERATION
Check:
for corrosion
for pushed-out pins
that connector seats correctly
Connect any disconnected connectors.
Make sure all other system connectors are fully seated.
Operate the system and verify the concern is still present.
Is the concern still present?
Yes
INSTALL a new instrument cluster. REFER to Instrument Cluster in this section. CLEAR the DTCs. REPEAT the
HEC self-test.
No
The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector.
CLEAR the DTCs. REPEAT the self-test.
CONDITIONS DETAILS/RESULTS/ACTIONS
D1 THE LOW FUEL GAUGE WARNING INDICATOR IS NEVER/ALWAYS ON
Check the fuel gauge for correct operation.
Is the fuel gauge operating correctly?
Yes
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PINPOINT TEST E: INCORRECT OIL PRESSURE GAUGE INDICATION
INSTALL a new instrument cluster. REFER to Instrument Cluster. CLEAR the DTCs. REPEAT the self-test.
No
GO to Pinpoint Test C.
CONDITIONS DETAILS/RESULTS/ACTIONS
E1 CHECK CIRCUIT 31 (WH/RD) FOR AN OPEN
Engine Oil Pressure Switch C101
Connect a fused jumper wire between engine oil pressure switch C101, circuit 31 (WH/RD), harness side and
ground.
Does the instrument cluster indicate normal oil pressure with the jumper wire connected and no engine
oil pressure with the jumper wire disconnected?
Yes
GO to E2.
No
GO to E3.
E2 CHECK THE ENGINE OIL PRESSURE
Carry out the engine oil pressure test. Refer to Section 303-00.
Is the engine oil pressure within specification?
Yes
INSTALL a new engine oil pressure switch. TEST the system for normal operation.
No
REFER to Section 303-00.
E3 CHECK CIRCUIT 31 (WH/RD)
Instrument Cluster C236
Measure the resistances between instrument cluster C236 pin 20, circuit 31 (WH/RD), harness side and engine
oil pressure switch C101, circuit 31 (WH/RD), harness side; and between instrument cluster C236 pin 20, circuit
31 (WH/RD), harness side and ground.
Is the resistance less than 5 ohms between the instrument cluster and the engine oil pressure switch,
and greater than 10,000 ohms between the instrument cluster and ground?
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PINPOINT TEST F: INCORRECT TEMPERATURE GAUGE INDICATION
PINPOINT TEST G: THE SPEEDOMETER/ODOMETER IS INOPERATIVE
Yes
GO to E4.
No
REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
E4 CHECK FOR CORRECT INSTRUMENT CLUSTER OPERATION
Check:
for corrosion
for pushed-out pins
that connector seats correctly
Connect any disconnected connectors.
Make sure all other system connectors are fully seated.
Operate the system and verify the concern is still present.
Is the concern still present?
Yes
INSTALL a new instrument cluster. REFER to Instrument Cluster in this section. CLEAR the DTCs. REPEAT the
HEC self-test.
No
REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
CONDITIONS DETAILS/RESULTS/ACTIONS
F1 CARRY OUT THE INSTRUMENT CLUSTER ENGINE COOLANT TEMPERATURE GAUGE ACTIVE COMMAND
Diagnostic Tool
Trigger instrument cluster active command ENGCOOLNT. Monitor the engine coolant temperature gauge while adjusting the ENGCOOLNT active command to
read 50% and 100%.
Does the temperature gauge start at cold, move to half at 50%, and full hot at 100%?
Yes
REFER to the Powertrain Control/Emissions Diagnosis (PC/ED) manual.
No
GO to F2.
F2 CHECK FOR CORRECT INSTRUMENT CLUSTER OPERATION
Check:
for corrosion
for pushed-out pins
that connector seats correctly
Connect any disconnected connectors.
Make sure all other system connectors are fully seated.
Operate the system and verify the concern is still present.
Is the concern still present?
Yes
INSTALL a new instrument cluster. REFER to Instrument Cluster in this section. CLEAR the DTCs. REPEAT the HEC self-test.
No
The system is operating correctly at this time. CLEAR the DTCs. REPEAT the self-test.
CONDITIONS DETAILS/RESULTS/ACTIONS
G1 CARRY OUT THE INSTRUMENT CLUSTER SPEEDOMETER ACTIVE COMMAND
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PINPOINT TEST H: THE SAFETY BELT WARNING INDICATOR IS INOPERATIVE (CHIME IS OPERATIVE)
Diagnostic Tool
Trigger the instrument cluster active command SPDOMETER, and scroll in increments of 5%. Monitor the speedometer gauge. The speedometer should be
increasing in increments of 16.7 kph (10 mph) for every 5%.
Does the speedometer indication agree with the active command?
Yes
REFER to the Powertrain Control/Emissions Diagnosis (PC/ED) manual.
No
GO to G2.
G2 CHECK FOR CORRECT INSTRUMENT CLUSTER OPERATION
Check:
for corrosion
for pushed-out pins
that connector seats correctly
Connect any disconnected connectors.
Make sure all other system connectors are fully seated.
Operate the system and verify the concern is still present.
Is the concern still present?
Yes
INSTALL a new instrument cluster. REFER to Instrument Cluster in this section. CLEAR the DTCs. REPEAT the HEC self-test.
No
The system is operating correctly at this time. CLEAR the DTCs. REPEAT the self-test.
CONDITIONS DETAILS/RESULTS/ACTIONS
H1 CHECK THE VEHICLE OPTION CONTENT
Verify the option content of the vehicle.
Is the vehicle equipped with a GEM?
Yes
GO to H2.
No
GO to H7.
H2 MONITOR THE GEM PID SBLTLMP
Diagnostic Tool
Monitor the GEM PID SBLTLMP while toggling the active command SBLT LAMP OFF and ON.
Does the GEM PID SBLTLMP indicate OFF---, ON---?
Yes
GO to H11.
No
If the GEM PID SBLTLMP indicates OFFO-G, GO to H3 .
If the GEM PID SBLTLMP indicates OFF-B-, GO to H5 .
H3 CHECK THE INSTRUMENT CLUSTER INPUT
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GEM C239
Connect a fused jumper wire between GEM C239 pin 12, circuit 450 (DG/LG), harness side and ground.
Does the seat belt indicator illuminate?
Yes
GO to H11.
No
GO to H4.
H4 CHECK INSTRUMENT CLUSTER CIRCUIT 450 (DG/LG) FOR AN OPEN
Instrument Cluster C237
Measure the resistance between instrument cluster C237 pin 10, circuit 450 (DG/LG), harness side and GEM
C239 pin 12, circuit 450 (DG/LG), harness side.
Is the resistance less than 5 ohms?
Yes
GO to H12.
No
REPAIR the circuit. TEST the system for normal operation.
H5 MONITOR THE GEM PID SBLTLMP WITH THE INSTRUMENT CLUSTER C237 DISCONNECTED
Monitor the GEM PID SBLTLMP while toggling the active command SBLTLMP OFF and ON.
Does the GEM PID SBLTLMP indicate ON-B-?
Yes
GO to H6.
No
GO to H12.
H6 CHECK CIRCUIT 450 (DG/LG) FOR SHORT TO POWER
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GEM C239
Measure the voltage between GEM C239 pin 12, circuit 450 (DG/LG), harness side and ground.
Is any voltage indicated?
Yes
REPAIR the circuit. TEST the system for normal operation.
No
GO to H11.
H7 MONITOR THE CTM PID SBLTLMP
Diagnostic Tool
Monitor the CTM PID SBLTLMP while toggling the active command SBLT LAMP OFF and ON.
Does the CTM PID SBLTLMP indicate OFF---, ON---?
Yes
GO to H8.
No
GO to H11.
H8 CHECK THE INSTRUMENT CLUSTER FOR AN OPEN
Instrument Cluster C237
Instrument Cluster C236
Measure the resistance between instrument cluster C237 pin 10, component side and C236 pin 2, component
side.
Is the resistance less than 5 ohms?
Yes
GO to H9.
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