Diagnostic Test

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

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 IOD fuse is installed and battery voltage is between 10.0 and 16.0 volts.
2. With the scan tool, read the module status.
  NOTE:
  Check the TIPM for any active CAN 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.
CHECK PCM POWER AND GROUND
1. Check the PCM power and ground circuits and perform the Checking the PCM Power and Ground Circuits diagnostic procedure.
  Were any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the PCM VERIFICATION TEST. Refer to 3.7L - POWERTRAIN VERIFICATION TEST .
  No
  - Go To 3.
CHECK THE (D65) CAN C BUS (+) CIRCUIT FOR AN OPEN

Fig 1: Checking CAN C BUS (+) Circuit For An Open
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. Disconnect the TIPM C1 harness connector.
3. Disconnect the PCM C2 harness connector.
4. Measure the resistance of the (D65) CAN C Bus (+) circuit between the TIPM C1 harness connector and the PCM C2 harness connector.
  Is resistance below 5.0 Ohms?
  
  Yes
  - Go To 4.
  No
  - Repair the open in the (D65) CAN C Bus (+) circuit.
  - Perform the PCM VERIFICATION TEST. Refer to 3.7L - POWERTRAIN VERIFICATION TEST .
CHECK THE (D64) CAN C BUS (-) CIRCUIT FOR AN OPEN

Fig 2: Checking CAN C BUS (-) Circuit For An Open
Courtesy of CHRYSLER GROUP, LLC
1. Measure the resistance of the (D64) CAN C Bus (-) circuit between the TIPM C1 harness connector and the PCM C2 harness connector.
  Is resistance below 5.0 Ohms?
  
  Yes
  - Replace and program the Powertrain Control Module in accordance with the Service Information.
  - Perform the PCM VERIFICATION TEST. Refer to 3.7L - POWERTRAIN VERIFICATION TEST .
  No
  - Repair the open in the (D64) CAN C Bus (-) circuit.
  - Perform the PCM VERIFICATION TEST. Refer to 3.7L - POWERTRAIN VERIFICATION TEST .