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3. CHECK FOR ENGINE BRAKE SWITCH DTCS With the scan tool, check for engine brake switch DTCs. Are there any engine brake switch DTCs present? Yes >> Refer to the engine Diagnosis and Testing category and perform the appropriate symptom. Perform ABS VERIFICATION TEST. (Refer to 5 - BRAKES - STANDARD PROCEDURE). No >> Go To 4 4. CHECK OTHER CONTROLLERS FOR BRAKE SWITCH DTCS With the scan tool check other controllers for Brake Switch DTCs. Do any other controllers report a Brake Switch DTC? Yes >> Refer to the Engine Diagnosis and Testing category and perform diagnostics for P0571 as though the DTC is active. Perform ABS VERIFICATION TEST. (Refer to 5 - BRAKES - STANDARD PROCEDURE). No >> Using the schematics as a guide, check the 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 Perform ABS VERIFICATION TEST. (Refer to 5 - BRAKES - STANDARD PROCEDURE). PM BRAKES - ABS ELECTRICAL DIAGNOSTICS 5 - 213 |