Chrysler Dodge Caravan 2002 Manual page 495

8J - 8 INSTRUMENT CLUSTER
INSTRUMENT CLUSTER (Continued)
CONDITION
ERRATIC POINTER
MOVEMENT.
FUEL GAUGE
INACCURATE.
CONDITION
NO POINTER
MOVEMENT.
POSSIBLE CAUSES
1. BAD PCI FUEL
MESSAGE FROM THE
BODY CONTROLLER.
2. INTERNAL CLUSTER
FAILURE.
1. FUEL GAUGE OUT OF
CALIBRATION.
2. FUEL LEVEL SENDING
UNIT IS OUT OF
CALIBRATION.
TEMPERATURE GAUGE DIAGNOSIS
POSSIBLE CAUSES
1. INTERNAL CLUSTER
FAILURE.
2. NO PCI
TEMPERATURE
MESSAGE OR COLD PCI
BUS MESSAGE FROM
THE POWERTRAIN
CONTROL MODULE.
CORRECTION
1. USE A DRB III SCAN TOOL TO CHECK THE BCM.
IF OK, GO TO STEP 2. IF NOT OK, REFER TO THE
PROPER BODY DIAGNOSTIC PROCEDURES
MANUAL TO PROPERLY DIAGNOSE AND REPAIR.
2. REFER TO THE FUEL SECTION OF THE SERVICE
MANUAL FOR THE FUEL LEVEL SENDING UNIT
TEST PROCEDURE. TEST UNIT. IF OK, LOOK FOR
ANOTHER POSSIBLE CAUSE FOR FUEL GAUGE
FAILURE. IF NOT OK, REPAIR SENDING UNIT.
2. PERFORM CLUSTER SELF-DIAGNOSTIC TEST
AND CHECK FOR FAULT CODES.
• IF THE POINTER MOVES DURING TEST BUT
STILL APPEARS ERRATIC, REPLACE CLUSTER
ASSEMBLY.
1. PERFORM CLUSTER SELF-DIAGNOSTIC TEST. IF
POINTER IS ACCURATE TO THE CALIBRATION
POINTS LOOK FOR ANOTHER POSSIBLE CAUSE
OF FAILURE. IF POINTER IS INACCURATE TO THE
CALIBRATION POINTS, REPLACE CLUSTER
ASSEMBLY.
2. REFER TO THE FUEL SECTION OF THE SERVICE
MANUAL FOR TESTING AND REPAIR PROCEDURE.
CORRECTION
1. PERFORM CLUSTER SELF-DIAGNOSTIC TEST
AND CHECK.
• IF TEMPERATURE GAUGE POINTER MOVES TO
CALIBRATION POINTS, LOOK FOR ANOTHER
POSSIBLE CAUSE OF FAILURE.
• IF THE POINTER DOESN'T MOVE DURING TEST,
VERIFY POWER AND GROUND ARE BEING
PROVIDED TO THE CLUSTER. IF YES, REPLACE
CLUSTER. IF NO, DETERMINE CAUSE OF NO
POWER OR NO GROUND.
2.A. CHECK PCM FAULT CODES USING A DRB III
SCAN TOOL. IF THERE ARE NO FAULTS, GO TO
STEP 2.B. IF THERE ARE FAULTS, REFER TO THE
PROPER POWERTRAIN DIAGNOSTIC
PROCEDURES MANUAL TO PROPERLY DIAGNOSE
AND REPAIR.
2.B. REFER TO FUEL, COOLANT TEMPERATURE
SENSOR, DIAGNOSIS AND TESTING. REPAIR
SENSOR AS NEEDED.
RS