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Diagnostic Test

WARNING: This page is about a different car, the 2016 Dodge Durango. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK IF THE DTC IS CURRENT 
    NOTE:

    Check for any TSB(s) related to the condition. If a TSB applies, perform the procedure outlined in the TSB before continuing.

    1. Turn the ignition on.
    2. With the scan tool, read the module status.
      NOTE:

      Check the Body Control Module (BCM) for any active CAN hardware DTCs and perform the appropriate diagnostic procedure before proceeding. Refer to the DTC INDEX article.

      Does the scan tool indicate that the module is active on the bus?

      Yes 

      • The no response condition is not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.

      No 

      • Go To  2
  2. CHECK THE (A938) FUSED B(+) CIRCUIT FOR AN OPEN 
    2. Turn the ignition off.
    3. Disconnect the Cluster C1 harness connector.
    4. Using a 12-volt test light connected to ground, check the (A938) Fused B(+) circuit.
      NOTE:

      The test light must illuminate brightly. Compare the brightness to that of a direct connection to the battery.

      Does the test light illuminate brightly?

      Yes 

      • Go To  3

      No 

      • Repair the (A938) Fused B(+) circuit for an open or excessive resistance.
        NOTE:

        If the fuse is open, make sure the check for a short to ground.

      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  3. CHECK THE (Z912) GROUND CIRCUITS FOR AN OPEN 
    1. Using a 12-volt test light connected to 12-volts, check both of the (Z912) Ground circuits.

      Does the test light illuminate brightly for each circuit?

      Yes 

      • Go To  4

      No 

      • Repair the (Z912) Ground circuit(s) for an open or excessive resistance.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  4. CHECK THE (F949) FUSED IGNITION SWITCH OUTPUT (RUN-START) CIRCUIT FOR AN OPEN 
    1. Turn the ignition on.
    2. Using a 12-volt test light connected to ground, check the (F949) Fused Ignition Switch Output (Run-Start) circuit.

      Does the test light illuminate brightly?

      Yes 

      • Go To  5

      No 

      • Repair the (F949) Fused Ignition Switch Output (Run-Start) circuit for an open or excessive resistance.
        NOTE:

        If the fuse is open, make sure the check for a short to ground.

      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  5. CHECK THE (D82) AND (D81) CAN C BUS CIRCUITS FOR AN OPEN 
    1. Measure the resistance of the (D81) CAN C(+) circuit between the Star CAN IP harness connector and the Cluster C1 harness connector.
    2. Measure the resistance of the (D82) CAN C(-) circuit between the Star CAN IP harness connector and the Cluster C1 harness connector.

      Are both measurements below 5.0 Ohms?

      Yes 

      • Replace the Cluster in accordance with the Service Information. Refer to REMOVAL .
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Repair the (D82) or (D81) CAN Bus circuit(s) for an open or excessive resistance.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
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