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Diagnostic Test

  1. 1) TEST FOR INTERMITTENT CONDITION 
    NOTE: Check for any TSB(s) related to the condition. If a TSB applies, perform the procedure outlined in the TSB before continuing.

    Turn the ignition on.

    NOTE: Ensure the IOD fuse is installed and battery voltage is between 10.0 and 16.0 volts.

    With the scan tool, select ECU View.

    NOTE: A red X will be next to the module that is not communicating, indicating that the module is not active on the Bus network. A green check indicates that the module is active on the Bus network.
    NOTE: Check the TIPM for any active CAN C hardware and any ignition related DTC's, perform DTC's before proceeding.

    Does the scan tool display a red X next to the module? 

    Yes 

    1. Go to step  2).

    No 

    1. The no response condition is not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring for chafed, pierced, pinched, and partially broken wires and the wiring harness connectors for broken, bent, pushed out, and corroded terminals.
  2. 2) CHECK ECM POWER AND GROUND 

    Check the ECM power and ground circuits. Refer to 9 - ENGINE ELECTRICAL DIAGNOSTICS - DIESEL for the diagnostic test procedure.

    Were any problems found? 

    Yes 

    1. Repair as necessary.
    2. Perform PCM VERIFICATION TEST .

    No 

    1. Go to step  3).
  3. 3) (D65) CAN C BUS (+) CIRCUIT OPEN 
    Fig 1: Checking (D65) CAN C BUS (+) Circuit
    GC0058896Courtesy of CHRYSLER LLC

    Turn the ignition off.

    Disconnect the TIPM C2 harness connector.

    Disconnect the ECM C1 harness connector.

    Measure the resistance of the (D65) CAN C Bus (+) circuit between the TIPM connector and the ECM connector.

    Is resistance below 5.0 ohms? 

    Yes 

    1. Go to step  4).

    No 

    1. Repair the (D65) CAN C Bus (+) circuit for an open.
    2. Perform PCM VERIFICATION TEST .
  4. 4) (D64) CAN C BUS (-) CIRCUIT OPEN 
    Fig 2: Measuring Resistance Of (D64) CAN C BUS (-) Circuit Between TIPM Connector And ECM Connector
    GC0058897Courtesy of CHRYSLER LLC

    Measure the resistance of the (D64) CAN C Bus (-) circuit between the TIPM connector and the ECM connector.

    Is resistance below 5.0 ohms? 

    Yes 

    1. Replace and program the Engine Control Module in accordance with the service information.
    2. Perform PCM VERIFICATION TEST .

    No 

    1. Repair the (D64) CAN C Bus (-) circuit for an open.
    2. Perform PCM VERIFICATION TEST .
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