P0500

DTC P0500: Vehicle Speed Sensor (VSS) Circuit

Wiring Diagram:

Circuit Description
Vehicle speed information is provided to the Engine Control Module (ECM) by the voltage. Vehicle Speed Sensor (VSS) is a permanent magnet generator that is mounted in the transaxle and produces a pulsing voltage whenever vehicle speed is over 5 km/h (3 mph). The A/C voltage level and the number of pulses increase with vehicle speed. The converted signal is supplied to the instrument panel for speedometer/odometer operation and to the cruise control module and multi-function alarm module operation. The Diagnostic Trouble Code (DTC) will detect wether the CAN link is functional and the TCM is sending reliable output shaft data.

Conditions for Setting the DTC
- Battery voltage is between 9.039 and 25.898 V.
- No main relay fault detected.
- The ECM detects the vehicle speed is too high, or the ECM detects the vehicle speed is too high compared to the average value, or the ECM detects the vehicle speed is too low.

Action Taken When the DTC Sets
- The Malfunction Indicator Lamp (MIL) will illuminate.
- The ECM will record operating conditions at the time the diagnostic fail. This information will be stored in the Freeze Frame and Failure Records buffers.
- A history DTC is stored.

Conditions for Clearing the MIL/DTC
- The MIL will turn OFF at the end of 3 consecutive validation cycle in which the diagnostic runs without a fault.
- A history DTC will clear after 40 warm up cycles without a fault.
- DTC(s) can be cleared by using the scan tool.

Step 1 - 8:

DTC Troubleshooting