Diagnostic Test

VERIFY THE DIAGNOSTIC TROUBLE CODE (DTC) IS ACTIVE
NOTE:
Make sure the IOD fuse is installed and battery voltage is between 10 and 16 volts before proceeding.
1. Using the scan tool, read active DTCs.
  Is this DTC active?
  
  Yes
  - Go To 2.
  No
  - Refer to STORED LOST COMMUNICATION DTCS and perform the diagnostic procedure.
CHECK FOR ANY OF THE FOLLOWING ACTIVE DTCS
1. Using the scan tool, read all active DTCs from all modules.
  NOTE:
  Check for TIPM configuration, CAN B or C hardware electrical, VIN Missing/Mismatch, battery or ignition related DTCs.
  
  Does the scan tool display any active DTCs to the conditions listed above?
  
  Yes
  - Go to and perform the appropriate diagnostic procedure.
  No
  - Go To 3.
VERIFY THE SHIFTER LEVER ASSEMBLY OR THE ELECTRONIC SHIFT MODULE (ESM) IS ACTIVE ON THE BUS
1. Turn the ignition on.
2. Using the scan tool, select ECU View.
3. Verify the ESM is active on the bus.
  Is the ESM active on the bus?
  
  Yes
  - Go To 4.
  No
  - Perform the appropriate NO RESPONSE FROM ESM diagnostic procedure. Refer to DIAGNOSIS AND TESTING .
CHECK FOR ADDITIONAL COMMUNICATION RELATED DTCS
1. Using the scan tool, select Network View and select Advanced.
  Is there more than one module with active DTCs "Logged Against" the Shifter Lever Assembly (NAG 1 Only) or if applicable the Electronic Shift Module (Column NAG 1)?
  
  Yes
  - Replace/update the Shifter Lever Assembly (NAG 1 Only) or if applicable the Electronic Shift Module (Column NAG 1) in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Replace/update the module that set this DTC in accordance with the Service Information.
  - Perform the appropriate verification test for the module being replaced. If there is no verification test for the associated module perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .