DTC P0500 Vehicle Speed Sensor "A": Description

WARNING: This page is about a different car, the 2007 Lexus RX 350. However, it is still accessible from the selected car via links, so may be relevant.

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: Vehicle Speed Sensor Signalling Flow Diagram

DTC TROUBLE DETECTION CONDITION CHART

DTC No.	DTC Detection Condition	Trouble Area
P0500	The ECM detects the following conditions simultaneously for 2 seconds (1 trip detection logic): No SPD (speed sensor) signal while ECM detects NC (transmission counter gear) signal is more than 300 RPM Park / neutral position switch is OFF (When shift lever is in other than P and N positions)	Open or short in speed sensor circuit Speed sensor Combination meter ECM Skid control ECU