Vehicle Speed Sensor: Testing and Inspection

Speedometer Signal Inspection
1. Remove the combination meter.
2. Disconnect the speedometer connector.
3. Set the voltmeter to the 5V range.
4. Turn the ignition switch to the LOCK position.
5. Measure the voltage between terminals 3A and 3C of the vehicle speedometer sensor connector (harness side) while the rear wheels are turning slowly.
6. If the voltmeter pointer moves slightly, the signal coming to the speedometer is OK.
a. If the speedometer doesn't work and;
- The signal tests OK, replace the speedometer.
- The signal is not OK, (voltmeter pointer does not move ), check the vehicle speedometer sensor and/or wiring.
7. Connect the speedometer connector.
8. Install the combination meter.




Vehicle Speedometer Sensor Inspection
1. Disconnect the negative battery cable.
2. Remove the vehicle speedometer sensor.
3. Verify that magnetic resistance is felt when turning the vehicle speedometer sensor driven gear by hand.
4. Disconnect the vehicle speedometer sensor connector.
5. Set the voltmeter to the 5V range.




6. Measure the voltage between terminals A and B while the rear wheels are turning slowly.
7. If the pointer does not move, check the vehicle speedometer sensor continuity.
8. Measure the resistance between terminals A and B.

Resistance: Approx. 290 ohms at 20-80°C (68-176°F)

9. If not correct, replace the vehicle speedometer sensor.
10. Apply ATF to a new 0-ring and install it on the vehicle speedometer sensor.




11. Install the vehicle speedometer sensor.

Tightening Torque: 7.9-10.7 N m (70-95 in.lb.)

12. Connect the vehicle speedometer sensor connector.
13. Connect the negative battery cable.