Diagnostic Test

CHECK IF THE DTC IS ACTIVE
1. With the scan tool, read Transmission DTCs.
  Is the status Active or is the Starts Since Set counter 2 or less for this DTC?
  
  Yes
  - Go To 2.
  No
  - Go To 6.
CHECK FOR ENGINE BRAKE SWITCH DTCS
1. With the scan tool, check for engine brake switch DTCs.
2. With the scan tool, check if the brake switch changes when the brake pedal is pressed.
  Are there any engine brake switch DTCs present or is the brake switch not registering any change on the scan tool?
  
  Yes
  - Perform the appropriate diagnostic procedure. Refer to 3.7L - NGC - INTERMITTENT CONDITION, PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE, PCM/TCM PROGRAMMING & POWERTRAIN VERIFICATION TEST . If no DTCs are present and the brake switch does not seem to function, diagnose the brake switch as though a valid DTC is present.
  - Perform the CVT VERIFICATION TEST. Refer to Standard Procedure .
  No
  - Go To 3.
CHECK THE CENTER HIGH MOUNT STOP LAMP (CHMSL) OPERATION
1. While monitoring the CHMSL, depress the brake pedal.
  Does the CHMSL illuminate?
  
  Yes
  - Go To 4.
  No
  - Perform the appropriate diagnostic procedure. Refer to Diagnosis and Testing .
CHECK THE TCM BRAKE SWITCH INPUT OPERATION
1. With the scan tool in TCM, depress the brake pedal and monitor the Brake Switch status.
  Does the Brake Switch status change states when the brake pedal is depressed?
  
  Yes
  - Go To 6.
  No
  - Go To 5.
CHECK THE TIPM BRAKE SWITCH INPUT OPERATION
1. With the scan tool in TIPM, depress the brake pedal and monitor the Brake Switch status.
  Does the Brake Switch status change states when the brake pedal is depressed?
  
  Yes
  - Using the diagrams as a guide, check the Totally Integrated Power Module (TIPM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. Check for any Service Bulletins for possible causes that may apply. If no problems are found, replace and program the TIPM in accordance with the Service Information.
  - Perform the CVT VERIFICATION TEST. Refer to Standard Procedure .
  - If the DTC resets, Use the diagrams as a guide and check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. Check for any Service Bulletins for possible causes that may apply. If no problems are found, replace and program the TCM in accordance with the Service Information.
  - Perform the CVT VERIFICATION TEST. Refer to Standard Procedure .
  No
  - Check the (L53) Stop Lamp switch output circuit between the brake switch and the TIPM for an open or short to ground.
  - Perform the CVT VERIFICATION TEST. Refer to Standard Procedure .
CHECK THE WIRING AND CONNECTORS
1. Test complete, the condition or conditions that originally set this DTC are not present at this time.
2. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals and correct pin tension.
3. Wiggle the wires while checking for shorted and open circuits.
  Were there any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the CVT VERIFICATION TEST. Refer to Standard Procedure .
  No
  - Test Complete.