DTC 21

DTC P0500/21 Vehicle Speed Sensor Circuit
DTC P0503/23 Vehicle Speed Sensor Circuit

DESCRIPTION

DTC Detection Condition:

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.

Wiring Diagram:

Step 1-2:

Step 2(continued)-4:

INSPECTION PROCEDURE