Diagnostic Aids

A scan tool should indicate a vehicle speed whenever the drive wheels are turning at a speed of more than 5 km/h (3 mph). DTC P0500 can be falsely set if the engine is brake-torqued in gear. Disregard DTC P0500 if the DTC sets when the drive wheels are not turning.

An intermittent malfunction may be caused by a fault in the VSS sensor electrical circuit. Inspect the wiring harness and the components for any of the following conditions:

• Any backed-out terminals
• Any improper mating of terminals
• Any broken electrical connector locks
• Any improperly formed or damaged terminals
• Any faulty terminal-to-wire connections
• Any physical damage to the wiring harness
• A broken wire inside the insulation
• Any corrosion of the electrical connections, the splices, or the terminals

Repair any electrical circuit faults that were found. Refer to Wiring Repairs in Wiring Systems.

The information included in the Freeze Frame data can be useful in determining the vehicle operating conditions when the DTC first set.