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Diagnostic Procedure

WARNING: This page is about a different car, the 2004 Dodge Dakota. However, it is still accessible from the selected car via links, so may be relevant.
PCM MESSAGES NOT RECEIVED - DIAGNOSTIC PROCEDURE

TEST ACTION
1 Turn the ignition on.
With the DRB, enter Body Computer, System Tests then PCM Monitor.
Does the DRB display: PCM is active on BUS?
  1. Yes --> Replace the Central Timer Module in accordance with the service information.

    Perform BODY VERIFICATION TEST - VER 1  .

  2. No --> Go To 2
2 Turn the ignition on.
With the DRB, attempt to communicate with the PCM.
Was the DRB able to communicate with the PCM?
  1. Yes --> Go To 3
  2. No --> Refer to the COMMUNICATION  category for the related symptom.

    Perform BODY VERIFICATION TEST - VER 1  .
3 Turn the ignition off.
Disconnect the PCM harness connector.
CAUTION: IF NGC, 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.

Disconnect the DRBIII(R) from the DLC.
Measure the resistance of the PCI Bus circuit between the PCM connector (from special tool #8815 if NGC) and the DLC.
Is the resistance below 5.0 ohms?
  1. Yes --> Replace and program the Powertrain Control Module in accordance with the service information.

    Perform BODY VERIFICATION TEST - VER 1  .

  2. No --> Repair the PCI Bus circuit for an open.

    Perform BODY VERIFICATION TEST - VER 1  .
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