Diagnostic Test

WARNING: This page is about a different car, the 2012 Jeep Patriot and 2012 Jeep Compass. However, it is still accessible from the selected car via links, so may be relevant.

CHECK THE STATUS OF THE ERROR MESSAGE
NOTE:
Ensure the vehicle being tested is a CAN BUS VEHICLE. If not, false error messages may be displayed.

NOTE:
Ensure the scan tool is updated to the latest software.

NOTE:
Check for any TSB(s) related to the condition. If a TSB applies, perform the procedure outlined in the TSB before continuing.
1. With the scan tool, record the error message.
2. Disconnect the scan tool from the DLC.
3. Cycle the ignition from on to off 3 times.
4. Turn the ignition on.
  Does the scan tool display this same error message?
  
  Yes
  - Go To 2.
  No
  - The conditions that caused this error message to set are not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
(D72) DIAGNOSTIC CAN C (+) CIRCUIT OPEN

Fig 1: Checking Can C Diagnostic (+) Circuit For An Open
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. Disconnect the Totally Integrated Power Module (TIPM) C3 harness connector.
3. Disconnect the scan tool from the DLC.
4. Measure the resistance of the (D72) Diagnostic CAN C (+) circuit between the TIPM C3 harness connector and the DLC.
  Is the resistance below 5.0 ohms?
  
  Yes
  - Inspect the wiring and connectors for damage or shorted circuits. If ok, replace the Totally Integrated Power Module in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Repair the (D72) Diagnostic CAN C (+) circuit for an open.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .