Speed Sensor Circuit (Vehicle Speed Sensor/MTR)

Using voltmeter, backprobe TCM connector. See Figure. Measure voltage between ground and terminal No. 40 while driving 1-2 MPH for 3 feet or more. See Figure. Voltage should vary from 0-5 volts. If voltage is not as specified, check for continuity in wiring harness between TCM and speed sensor. Inspect ground circuit. See appropriate INSTRUMENT PANELS article in ACCESSORIES & EQUIPMENT.