Erratic Pointer Movement (Erratic Message From Another Module)
- Using scan tool, check Body Control Module (BCM) for DTCs. See SELF-DIAGNOSTIC SYSTEM
in BODY CONTROL MODULES - CARAVAN, TOWN & COUNTRY, & VOYAGER article. If any DTCs are present, repair as necessary. If no BCM DTCs exist, go to next step.
- Check Powertrain Control Module (PCM) for DTCs. See SELF-DIAGNOSTICS - CARAVAN, TOWN & COUNTRY, & VOYAGER
article in ENGINE PERFORMANCE. If any PCM DTCs are present, repair as necessary. If no PCM DTCs are present, go to next step.
- 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. See ENGINE PERFORMANCE in appropriate SYSTEM WIRING DIAGRAMS article in ELECTRICAL. If a problem still exists, go to ERRATIC POINTER MOVEMENT (INSTRUMENT CLUSTER FAILURE) .
- The TCM for vehicles with the 4 speed electronic transmissions. Check continuity from TCM to PCM. If OK, use a DRBIII® scan tool to check TCM. See appropriate ELECTRONIC CONTROLS article in AUTOMATIC TRANSMISSIONS. If not OK, repair wiring. See ENGINE PERFORMANCE in appropriate SYSTEM WIRING DIAGRAMS article in ELECTRICAL. If no TCM DTCs are present, go to ERRATIC POINTER MOVEMENT (INSTRUMENT CLUSTER FAILURE) .