Speed Sensor Diagnostics Inoperative

Check stoplight switch circuit. See STOPLIGHT SWITCH CIRCUIT chart under DIAGNOSTIC CHARTS. Check parking brake switch circuit. See PARKING BRAKE SWITCH CIRCUIT chart under DIAGNOSTIC CHARTS. Check speed sensor circuit. See CODES 31, 32, 33, 34, 35 & 36 SPEED SENSOR CIRCUIT charts under DIAGNOSTIC CHARTS. Ensure ABS ECU connector is properly connected. Ensure there are no damaged terminals in ABS ECU connector. Repair if necessary.