Vehicle Speed Sensor: Testing and Inspection

- Disconnect negative cable at battery.
- Remove combination meter from instrument panel.
- Connect ohmmeter between "VSS" terminal and "GND" terminal of combination meter and turn cable joint of speedometer with a screwdriver. Ohmmeter indicator should move back and forth between 0 (zero) and (infinity) 4 times while cable joint is turned one full revolution. Replace speedometer if check result is not satisfactory.
- Install combination meter to instrument panel.
- Connect negative cable to battery.









- Turn OFF ignition switch.
- Disconnect coupler(s) from powertrain control module.
- Bring ohmmeter probes in touch with coupler terminals from harness side.
Separately from the above inspection, vehicle speed sensor itself can be checked on its resistance by disconnecting coupler.

NOTE:
- Function of vehicle speed sensor can be checked by measuring generated pulse as voltage.








- For its measurement, use an analog type voltmeter while spinning wheels on lift and with selector lever in "D" range.