Diagnostic Test

With the scan tool, read Transmission DTCs.

Is the status Active for this DTC or is the STARTS SINCE SET counter 2 or less? 

Yes 

1. Go To  2).

No 

1. Go To  4).

With the scan tool, check for engine brake switch DTCs.

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 

1. Refer to the appropriate Engine ELECTRICAL DIAGNOSTICS article and perform the appropriate symptom. 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.
2. Perform CVT VERIFICATION TEST .

No 

1. Go To  3).

With the scan tool check other controllers for Brake Switch DTCs.

Do any other controllers report a Brake Switch DTC? 

Yes 

1. Refer to the appropriate Engine ELECTRICAL DIAGNOSTICS article and perform diagnostics for P0571 as though the DTC is active.
2. Perform CVT VERIFICATION TEST .

No 

1. 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. Check for any Service Bulletins for possible causes that may apply. If no problems are found, replace the TCM per the Service Information.
2. Perform CVT VERIFICATION TEST .

The conditions necessary to set this DTC are not present at this time.

Using the schematics as a guide, inspect the wiring and connectors specific to this circuit.

Wiggle the wires while checking for shorted and open circuits.

Were there any problems found? 

Yes 

1. Repair as necessary.
2. Perform CVT VERIFICATION TEST .

No 

1. Test Complete.