Diagnostic Test

WARNING: This page is about a different car, the 2017 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

VERIFY DTC IS ACTIVE
NOTE:
If present, diagnose and repair DTC U0001-00-CAN C BUS before diagnosing this DTC.
1. Ignition on, engine not running.
2. With the scan tool, read and record ASCM DTCs.
3. With the scan tool, erase ASCM DTCs.
4. Cycle the ignition switch.
5. With the scan tool, read ASCM DTCs.
  Is this DTC active?
  
  Yes
  - Go To 2
  No
  - Perform the Stored Lost Communication diagnostic procedure. Refer to STORED LOST COMMUNICATION DTCS .
  - Perform the BODY VERIFICATION TEST. (Refer to BODY VERIFICATION TEST ).
CHECK FOR ANY OF THE FOLLOWING ACTIVE DTCS
1. With the scan tool, read all active DTCs from all CAN C Bus modules.
  NOTE:
  Check for CAN C hardware electrical, VIN Missing/Mismatch, battery or ignition related DTCs.
  
  Does the scan tool display any active DTCs related to the conditions listed above?
  
  Yes
  - Diagnose and repair the DTCs. Refer to DTC INDEX - 2500 HD .
  No
  - Go To 3
VERIFY THAT THE SAS IS ACTIVE ON THE BUS
1. With the scan tool, select ECU View.
2. Verify that the SAS is active on the bus.
  Is the SCM active on the bus?
  
  Yes
  - Go To 4
  No
  - Perform the Stored Lost Communication diagnostic procedure. Refer to STORED LOST COMMUNICATION DTCS .
CHECK FOR ADDITIONAL COMMUNICATION RELATED DTCs
1. With the scan tool, select Network View and select Advanced.
  Is there more than one module with active DTCs "Logged Against" the SAS?
  
  Yes
  - Replace the Steering Column Control Module (SCCM) in accordance with the service information. Refer to MODULE, STEERING COLUMN (SCM), REMOVAL .
  No
  - Replace the Air Suspension Control Module (ASCM) in accordance with the Service Information. Refer to MODULE, AIR SUSPENSION CONTROL (ASCM), REMOVAL .
  - Perform the ASCM VERIFICATION TEST. Refer to STANDARD PROCEDURE - ASCM VERIFICATION TEST .