Diagnostic Test

WARNING: This page is about a different car, the 2012 RAM Pickup and 2012 RAM Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

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

NOTE:
Make sure the scan tool is updated to the latest software.
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 three times.
4. Reconnect the scan tool.
5. 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 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.
(D71) DIAGNOSTIC CAN C (-) CIRCUIT OPEN

Fig 1: Checking Diagnostic CAN C (-) Circuit For Open
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. Disconnect the TIPM C7 harness connector.
3. Disconnect the scan tool from the DLC.
4. Measure the resistance of the (D71) Diagnostic CAN C (-) circuit between the TIPM C7 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 TIPM in accordance with the Service Information. Refer to MODULE, TOTALLY INTEGRATED POWER (TIPM), REMOVAL .
  - Refer to STANDARD PROCEDURE and perform the BODY VERIFICATION TEST.
  No
  - Repair the open in the (D71) Diagnostic CAN C (-) circuit.
  - Refer to STANDARD PROCEDURE and perform the BODY VERIFICATION TEST.