Chrysler Dodge Caravan 2002 Manual page 491

8J - 4 INSTRUMENT CLUSTER
INSTRUMENT CLUSTER (Continued)
CONDITION
NO POINTER
MOVEMENT.
SPEEDOMETER DIAGNOSIS
POSSIBLE CAUSES
1. INTERNAL CLUSTER
FAILURE.
2. NO SPEED PCI BUS
MESSAGE OR ZERO
MPH PCI SPEED BUS
MESSAGE.
CORRECTION
1.A. PERFORM CLUSTER SELF-DIAGNOSTIC TEST
AND CHECK FOR FAULT CODES.
• IF SPEEDOMETER POINTER MOVES TO
CALIBRATION POINTS DURING TEST LOOK FOR
ANOTHER POSSIBLE CAUSE OF FAILURE.
• IF THE POINTER DOESN'T MOVE DURING TEST,
CHECK FOR POWER AND GROUND TO THE MIC. IF
POWER AND GROUND ARE PRESENT GO TO STEP
1.B.
1.B. REPLACE CLUSTER. GO TO STEP 1.C.
1.C. CONNECT CLUSTER INTO INSTRUMENT
PANEL WIRING HARNESS. PLACE IT BACK INTO
THE PROPER POSITION IN THE INSTRUMENT
PANEL. PUT IN THE TOP FOUR MOUNTING
SCREWS AND SECURE THE CLUSTER TO THE
INSTRUMENT PANEL.
2.A. CHECK THE PCM (CODE 10) USING A DRB III
SCAN TOOL. IF OK, GO TO STEP 2.B. IF NOT OK,
REFER TO THE PROPER POWERTRAIN
DIAGNOSTIC PROCEDURES MANUAL TO REPAIR
THE PCM.
2.B. CHECK THE SPEED SIGNAL INPUT INTO THE
PCM. THE SPEED SIGNAL ORIGINATES FROM ONE
OF THE FOLLOWING SOURCES:
• A DISTANCE SENSOR FOR VEHICLES WITH 3
SPEED AUTOMATIC TRANSMISSION. CHECK
CONTINUITY FROM DISTANCE SENSOR TO PCM. IF
OK, REPLACE DISTANCE SENSOR. IF NOT OK,
REPAIR WIRING.
• THE TCM FOR VEHICLES WITH THE 4 SPEED
ELECTRONIC TRANSMISSIONS. CHECK
CONTINUITY FROM TCM TO PCM. IF OK, USE A
DRB III SCAN TOOL TO CHECK TCM. REFER TO
THE PROPER TRANSMISSION DIAGNOSTIC
PROCEDURES MANUAL TO REPAIR THE TCM. IF
NOT OK, REPAIR WIRING.
RS