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Diagnostic Test

WARNING: This page is about a different car, the 2013 RAM 1500. However, it is still accessible from the selected car via links, so may be relevant.
  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.

    1. Turn the ignition on.
      NOTE:

      Make sure the battery voltage is between 10.0 and 16.0 volts.

    2. With the scan tool, read the module status.
      NOTE:

      Check the BCM for any active CAN C hardware DTCs, perform DTC before proceeding.

      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 (A107) AND (A200) FUSED B(+) CIRCUITS FOR AN OPEN OR SHORT 
    1. Turn the ignition off.
    2. Disconnect the Anti-lock Brake System (ABS) Module harness connector.
    3. Using a 12-volt test light connected to ground, check the (A107) and the (A200) Fused B(+) circuits.

      Does the test light illuminate brightly for each circuit?

      Yes 

      • Go To  4

      No 

      • Repair the Fused B(+) circuits for an open or short.
      • Perform the ABS VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  3. CHECK THE (F941) IGNITION RUN/START CONTROL OUTPUT CIRCUIT FOR OPEN OR SHORT 
    1. Turn the ignition on.
    2. Using a 12-volt test light connected to ground, check the (F941) Ignition Run/Start Control Output circuit.

      Does the test light illuminate brightly?

      Yes 

      • Go To  4

      No 

      • Repair the (F941) Ignition Run/Start Control Output circuit for an open or short.
      • Perform the ABS VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  4. CHECK THE (Z902) GROUND CIRCUIT FOR AN OPEN 
    1. Using a 12-volt test light connected to 12-volts, check the (Z902) Ground circuits.

      Does the test light illuminate brightly for each circuit?

      Yes 

      • Go To  5

      No 

      • Repair the Ground circuits for an open.
      • Perform the ABS VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  5. CHECK THE (D79) CAN C BUS (+) CIRCUIT FOR AN OPEN 
    1. Turn the ignition off.
    2. Disconnect the Star CAN C connector C5 harness connector. Perform the CAN C DASH STAR CONNECTOR REMOVAL process. Refer to STANDARD PROCEDURE .
    3. Measure the resistance of the (D79) CAN C Bus (+) circuit between the Star CAN C Bus (+) C5 harness connector and the ABS Module harness connector.

      Is resistance below 5.0 Ohms?

      Yes 

      • Go To  6

      No 

      • Repair the (D79) CAN C Bus (+) circuit for an open.
      • Perform the ABS VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  6. CHECK THE (D80) CAN C BUS (-) CIRCUIT FOR AN OPEN 
    1. Measure the resistance of the (D80) CAN C Bus (-) circuit between the Star CAN C Bus (-) C5 harness connector and the ABS Module harness connector.

      Is resistance below 5.0 Ohms?

      Yes 

      No 

      • Repair the (D80) CAN C Bus (-) circuit for an open.
      • Perform the ABS VERIFICATION TEST. Refer to STANDARD PROCEDURE .
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