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Home >> Chrysler >> 2003 >> Intrepid ES, 3.5 V >> Repair and Diagnosis >> External Pages >> Different car >> Section 4 (Automatic Transmission Diagnosis) >> Diagnostic Tests >> DTC P1694: Bus Communication With Pcm >> Diagnostic Procedure

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.
  1. Using scan tool, attempt to communicate with BCM. If communication with BCM is not possible, diagnose communication concern. See appropriate BODY CONTROL MODULES article in ACCESSORIES & EQUIPMENT. If communication with BCM is possible, go to next step.
  2. Turn ignition on. Using scan tool, erase DTCs. Start engine and allow it to idle for at least 20 seconds. Using scan tool, check for DTCs. If DTC P1694 is displayed on scan tool, PCM is assumed to be faulty. Repair or replace as necessary. See POWERTRAIN CONTROL MODULE  under REMOVAL & INSTALLATION. If P1694 is not displayed on scan tool, go to next step.
  3. Conditions necessary to set DTC are not present at this time. Ensure to check for any communication DTCs or customer complaints concerning possible bus problem. This includes all modules on vehicle. If bus problems exist, see appropriate BODY CONTROL MODULES article in ACCESSORIES & EQUIPMENT. 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.
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