Diagnostic Test

WARNING: This page is about a different car, the 2009 Jeep Patriot and 2009 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 Data Link Connector (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 step 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.
DIAGNOSTIC CAN C CIRCUITS SHORTED TO VOLTAGE

Fig 1: Checking Diagnostic CAN C Circuits
Courtesy of CHRYSLER 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. Turn the ignition on.
5. Measure the voltage of the Diagnostic CAN C circuits at the TIPM C3 harness connector.
  Is the voltage above 6.0 volts on either circuit?
  
  Yes
  - Repair the Diagnostic CAN C circuits for a short to voltage.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .
  No
  - 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 DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .