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P0571-BRAKE SWITCH 1 PERFORMANCE For a complete wiring diagram Refer to Section 8W. Theory of Operation The Transmission Control Module (TCM) monitors the brake switch 1 signal over the CAN Bus. If the Transmission • When Monitored: • Set Condition: Possible Causes ENGINE BRAKE SWITCH DTCS PRESENT TRANSMISSION CONTROL MODULE Always perform the CVT Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 21 - Diagnostic Test 1. CHECK IF THE DTC IS ACTIVE 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 >> Go To 2 No >> Go To 4 2. CHECK FOR ENGINE BRAKE SWITCH DTCS 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 Yes >> Refer to the engine Diagnosis and Testing category 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 Perform CVT VERIFICATION TEST. (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - CVT - No >> Go To 3 PM AUTOMATIC - CVT-ELECTRICAL DIAGNOSTICS 21 - 123 |