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: Identifying Vehicle Speed Sensor Pulse Signal

DTC DETECTION CONDITIONS CHART

DTC No.	DTC Detection Conditions	Trouble Areas
P0500	Automatic Transmission Models: ECM detects following conditions simultaneously 500 times (1 trip detection logic) No SP1 (speed sensor) signal while ECM detects SP2 (No. 2 speed sensor) signal Vehicle speed 6 mph (9 km/h) or more for 4 seconds Park/Neutral position switch OFF (shift lever other than P and N positions) Transfer lever in other than N position (4WD)	Open or short in speed signal circuit Vehicle speed sensor Combination meter ECM Skid control ECU
P0500	Manual Transmission Models: Following conditions met for 8 seconds or more (2 trip detection logic): Engine coolant temperature 70°C (158°F) or more Engine speed 1,500 to 4,000 rpm Fuel cut at high engine speed not executing Engine load 31.6 % or more