DTC P0500 Vehicle Speed Sensor "A": Description

The speed sensor detects the wheel speed and sends the appropriate signals to the skid control ECU. The skid control ECU converts these wheel speed signals into a 4-pulse signal and outputs it to the ECM via the combination meter. The ECM determines the vehicle speed based on the frequency of these pulse signals.

Fig 1: Speed Sensor Pulse Chart

DTC TROUBLE DETECTION CONDITION

DTC No.	DTC Detection Condition	Trouble Area
P0500	The ECM detects following conditions simultaneously for 1 second (1 trip detection logic): No SPD (speed sensor) signal while ECM detects NC (transmission counter gear) signal Park/Neutral position switch is OFF (When shift lever is in other than P and N positions) Transfer lever is in other than N position (4WD)	Open or short in vehicle speed sensor circuit Vehicle speed sensor Combination meter ECM Skid control ECU