Diagnostic Procedure
WARNING: This page is about a different car, the 2002 Dodge Intrepid, 2002 Chrysler Intrepid, 2002 Chrysler Concorde, and 2002 Chrysler 300M. However, it is still accessible from the selected car via links, so may be relevant.
- Using scan tool, check STARTS SINCE SET counter for DTC P1687. If counter is set at zero, go to next step. If counter is not set at zero, go to step 5.
- Using scan tool, check all modules on vehicle for bus problems. If there is evidence of a bus problem, or PRNDL display on scan tool indicates NO BUS, diagnose body control system concern. See appropriate BODY CONTROL MODULES article in ACCESSORIES & EQUIPMENT. If no evidence of bus problems are present, go to next step.
- Turn ignition on. Using scan tool, erase DTCs. Start engine and allow it to idle in Park. Using scan tool, check for BCM DTCs. If a MIC MESSAGES NOT RECEIVED DTC is present, diagnose communication concern. See appropriate BODY CONTROL MODULES article in ACCESSORIES & EQUIPMENT. If no MIC DTCs are present, go to next step.
- Using scan tool, erase DTCs. Start engine and allow it to idle for 20 seconds. Using scan tool, check for transaxle DTCs. If DTC P1687 is displayed on scan tool, PCM is assumed to be faulty. Repair or replace as necessary. See POWERTRAIN CONTROL MODULE under REMOVAL & INSTALLATION. If P1687 is not displayed on scan tool, testing is complete.
- Conditions necessary to set DTC are not present at this time. Using wiring diagram as a guide, inspect wiring and connectors associated with circuits in question. See WIRING DIAGRAMS . Wiggle wires while checking for shorted and open circuits. Repair as necessary. If circuits are okay, testing is complete.