Auto. Trans.
- Raise and support front of vehicle. Set parking brake and block rear wheels. Insert voltmeter or test light positive probe into Yellow/Black wire terminal at control unit connector.
- Connect negative probe to ground. Start engine and place vehicle gear selector in "2" position and accelerate slowly. Battery voltage should be as indicated in SPEED SENSOR VOLTAGE CHECK table.SPEED SENSOR VOLTAGE CHECK
Speed Voltage Below 11 MPH Yes Above 16 MPH No - If voltmeter readings do not correspond to above MPH ranges, install new speed sensor and retest. If there was no voltage during step 2), check for bad electrical connection, fuse or faulty speed sensor. Repair or replace as necessary and retest.