The Vehicle Speed Sensor (VSS) is a pulse generator mounted to an adapter near the transaxle output shaft. The sensor is driven through the adapter by a speedometer pinion gear. The VSS pulse signal to the speedometer/odometer is monitored by the Powertrain Control Module (PCM) speed control circuitry to determine the vehicle speed and to maintain the speed control set speed.
Removal & Installation
- Before servicing the vehicle, refer to the Precautions Section.
- Raise and safely support the vehicle.
Disconnect the Vehicle Speed Sensor (VSS) connector.
WARNINGClean the area around the VSS before removing it in order to prevent dirt from entering the transaxle during the VSS removal.
- Remove the VSS retaining bolt.
Remove the VSS from the transaxle.
WARNINGCarefully remove the VSS so that the sensor drive gear does not fall into the transaxle. Should the sensor drive gear fall into the transaxle during sensor removal, the drive gear must be reattached to the sensor.
- Remove the VSS drive gear from the speed sensor.
- Install the pinion gear to the VSS.
- Using a NEW O-ring, install the VSS to the transaxle.
- Install the retaining bolt and torque to 62 inch lbs. (7 Nm).
- Connect the VSS electrical connector.
- Lower the vehicle and road test it in order to verify the proper speedometer operation.
- Ensure the Vehicle Speed Sensor (VSS) is correctly tightened to the transmission housing.
- Install a scan tool.
Turn ON the ignition, with the engine OFF.
NOTEBefore clearing the DTC, use the scan tool in order to record the Freeze Frame and Failure Records. Using the Clear Info function erases the Freeze Frame and Failure Records from the PCM. Record the DTC Freeze Frame and Failure Records, then clear the DTC(s).
WARNINGSupport the lower control arms in the normal horizontal position in order to avoid damage to the drive axles. Do not operate the vehicle in gear with the wheels hanging down at full travel.
- Raise and support the drive wheels.
- Start and idle the engine.
- Engage the transaxle in forward drive gear.
- Select Vehicle Speed Sensor on the scan tool.
- With the drive wheels rotating, the Vehicle Speed Sensor reading should increase when the wheel speed increases.