Diagnostic Test

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

DIAGNOSTIC TROUBLE CODE (DTC) IS ACTIVE
1. Ignition on, engine not running.
2. Using the scan tool, select erase DTC's.
3. Cycle the ignition from off to on at least five times, leaving the ignition on for a minimum of 90 seconds per cycle.
4. Using the scan tool, select read DTC's.
  Does the DTC reset and/or remain active?
  
  Yes
  - Go To 2.
  No
  - Go To 6.
CAN C BUS DTC's SET IN TOTALLY INTEGRATED POWER MODULE (TIPM)
1. Using the scan tool, read DTC's in the TIPM.
  Are there any active CAN C Bus DTC's?
  
  Yes
  - Refer to COMMUNICATION - DIAGNOSIS AND TESTING and perform the appropriate diagnostic procedure.
  No
  - Go To 3.
(D52) 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 Antilock Brake Module harness connector.
3. Disconnect the TIPM C7 harness connector.
4. Measure the resistance of the (D52) CAN C Bus (+) circuit between the Antilock Brake Module harness connector and the TIPM C7 harness connector.
  Is the resistance above 2.0 Ohms?
  
  Yes
  - Repair the (D52) CAN C Bus (+) circuit for an open.
  - Perform the ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
  No
  - Go To 4.
(D51) 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 (D51) CAN C Bus (-) circuit between the Antilock Brake Module harness connector and the TIPM C7 harness connector.
  Is the resistance above 2.0 Ohms?
  
  Yes
  - Repair the (D51) CAN C Bus (-) circuit for an open.
  - Perform the ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
  No
  - Go To 5.
ANTILOCK BRAKE SYSTEM (ABS) MODULE
1. Inspect the wiring between the ABS Module harness connector and the TIPM harness connector. If any problems are found, repair as necessary. If no problems are found, view repair.
  Repair
  - Replace the Antilock Brake Module in accordance with the Service Information.
  - Perform the ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
INTERMITTENT CAN C BUS TRANSMIT PERFORMANCE DTC
1. The conditions necessary to set this DTC are not present at this time.
2. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
3. While monitoring the scan tool data relative to this circuit, wiggle test the wiring and connectors.
4. Look for the data to change or for the DTC to reset during the wiggle test.
  Were any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
  No
  - Test complete, the condition or conditions that originally set this DTC are not present at this time.