DTC P0500 Vehicle Speed Sensor "A": Description

Vehicles, which are equipped with ABS (Anti-Lock Brake System), detect the vehicle speed using the skid control ECU and wheel speed sensor. The wheel speed sensor monitors the wheel rotation speed and sends a signal to the skid control ECU. The skid control ECU converts the wheel speed signal into a 4- pulse signal and transmits it to the ECM via the combination meter. The ECM determines the vehicle speed based on the frequency of the pulse signal.

Fig 1: Vehicle Speed Sensor - Communication Diagram

DTC DETECTION CONDITION CHART

DTC No.	DTC Detection Condition	Trouble Area
P0500	While vehicle being driven, no vehicle speed sensor signal to ECM (1 trip detection logic: Automatic transaxle) (2 trip detection logic: Manual transaxle)	Open or short in vehicle speed sensor circuit Vehicle speed sensor Combination meter ECM Skid control ECU