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Diagnostic Test

WARNING: This page is about a different car, the 2013 Jeep Patriot and 2013 Jeep Compass. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK FOR ACTIVE DIAGNOSTIC TROUBLE CODE (DTC)S 
    1. With the scan tool, read the active DTCs.
    2. Cycle the ignition switch from off to on at least 5 times, leaving the ignition on for a minimum of 90 seconds per cycle.
    3. With the scan tool, read the active DTCs.

      Does the scan tool display this DTC as active?

      Yes 

      • Go To  2

      No 

      • If the DTC is stored, check for an intermittent condition. Visually inspect the related wiring harness connectors. Look for broken, bent, pushed out, or corroded terminals.
  2. CHECK TOTALLY INTEGRATED POWER MODULE DTCs 
    1. With the scan tool, read Totally Integrated Power Module (TIPM) active DTCs.

      Does the scan tool display any CAN B BUS DTCs as active?

      Yes 

      • Go to the DTC INDEX article and perform the appropriate diagnostic procedure.

      No 

      • Go To  3
  3. (D55) CAN B BUS (+) CIRCUIT OPEN 
    Fig 1: Checking CAN B BUS (+) Circuit Open
    GC0099706Courtesy of CHRYSLER GROUP, LLC
    1. Turn the ignition off.
    2. Disconnect the negative battery cable.
    3. Disconnect the ITM harness connector.
    4. Disconnect the TIPM C3 connector.
    5. Measure the resistance of the (D55) CAN B Bus (+) circuit between the TIPM C3 connector and the ITM harness connector.

      Is the resistance below 2.0 ohms?

      Yes 

      • Go To  4

      No 

      • Repair the (D55) CAN B Bus (+) circuit for an open.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  4. (D54) CAN B BUS (-) CIRCUIT OPEN 
    Fig 2: Checking CAN B BUS (-) Circuit Open
    GC0099707Courtesy of CHRYSLER GROUP, LLC
    1. Measure the resistance of the (D54) CAN B Bus (-) circuit between the TIPM C3 connector and the ITM harness connector.

      Is the resistance below 2.0 ohms?

      Yes 

      • Replace the Intrusion Transceiver Module in accordance with the Service Information.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Repair the (D54) CAN B Bus (-) circuit for an open.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
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