Circuit Description

Vehicle Speed Sensor (VSS) is mounted to rear of transmission. The VSS outputs a 4-pulse signal for every revolution of the rotor shaft, which is driven by transmission output shaft. Signal is used by ECM to determine vehicle speed. DTC is set if there is no VSS signal to ECM while vehicle is being driven. Possible causes are:

• Vehicle speed sensor.
• Open or short circuit in VSS circuit.
• Instrument cluster.
• Speedometer cable.
• ECM.