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DTC P1695: No Body Bus Messages: Testing

  1. Turn the ignition on. With the DRBIII® scan tool, erase DTCs. Cycle the ignition key on and off several times leaving the ignition on for at least 20 seconds. With the DRBIII® scan tool, read DTCs. Does the DTC reset? If yes, go to next step. If no, see INTERMITTENT CONDITION  under SELF-DIAGNOSTIC SYSTEM.
  2. With the DRBIII® scan tool, attempt to communicate with BCM. Can communication can be established with BCM? If yes, go to next step. If no, repair the communication problem. See appropriate BODY CONTROL MODULES article in ACCESSORIES & EQUIPMENT.
    3. CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install Miller Special Tool (8815) to perform diagnosis.
  3. Turn the ignition off. Disconnect the PCM harness connectors. Disconnect the BCM harness connector. Inspect the PCI Bus terminal at both the PCM connector and the BCM connector. Check for corrosion, damage or terminal push out. Repair connector as necessary. If connector is okay, measure the resistance of the PCI bus circuit between the Miller Special Tool (8815) and the BCM harness connector. Is the resistance below 5.0 ohms? If yes, replace PCM. Program the new PCM. See PROGRAMMING . If no, repair the PCI bus circuit for an open.
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