Diagnostic Test

CHECK FOR TIPM/FCM CAN BUS DTCS
1. With the scan tool, read TIPM/FCM DTCs.
  Are there any TIPM/FCM CAN BUS DTCs present?
  
  Yes
  - Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Diagnosis and Testing and perform the appropriate symptom. Perform the diagnostic procedure for U0002-CAN C BUS OFF PERFORMANCE first if it is present.
  - Perform NAG1 TRANSMISSION VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Transmission Control (TCM) - Standard Procedure
  No
  - Go to step 2
CHECK IF HVAC DTCS ARE PRESENT
1. With the scan tool, read HVAC DTCs.
  Are there any HVAC DTCs present?
  
  Yes
  - Refer to DTC-Based Diagnostics/HVAC - Diagnosis and Testing and perform the appropriate symptom.
  - Perform NAG1 TRANSMISSION VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Transmission Control (TCM) - Standard Procedure
  No
  - Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace and program the TCM in accordance to the Service Information.
  - Perform NAG1 TRANSMISSION VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Transmission Control (TCM) - Standard Procedure