Vehicle Speed Sensor: Description and Operation

The Vehicle Speed Sensor (VSS) is no longer used for any Dodge Truck.

Vehicle speed and distance covered are measured by the Rear Wheel Speed Sensor. The sensor is mounted to the rear axle. A signal is sent from this sensor to the Controller Antilock Brake (CAB) computer. A signal is then sent from the CAB to the Powertrain Control Module (PCM) to determine vehicle speed and distance covered. The PCM will then determine strategies for speed control system operation.

Testing for the Rear Wheel Speed Sensor can be found at Antilock Brakes / Traction Control Systems. Testing and Inspection

All other testing for the Vehicle Speed Signal can be found at Computers and Control Systems. Testing and Inspection