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 step 2
  No
  - Refer to Non-DTC Diagnostics/Communication - Diagnosis and Testing and perform the Stored Lost Communication DTCs 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 FCM 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 step 3
VERIFY THAT THE FDCM IS ACTIVE ON THE BUS
1. Turn the ignition on.
2. Using the scan tool, select Network Diagnostics.
3. Verify that the FDCM is active on the bus.
  Is the FDCM active on the bus?
  
  Yes
  - Go to step 4
  No
  - Refer to Non-DTC Diagnostics/Communication - Diagnosis and Testing and perform the No Response from FDCM diagnostic procedure.
CHECK FOR ADDITIONAL COMMUNICATION RELATED DTCS
1. Using the scan tool, select Network Diagnostics.
  Is there more than one module with active DTCs "Logged Against" the FDCM?
  
  Yes
  - Replace/update the Final Drive Control Module in accordance with the Service Information.
  - Perform the appropriate FDCM VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Final Drive Control (FDCM) - 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. See DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure .