Speedometer Malfunction: Description

The combination meter assembly receives vehicle speed signals from the brake booster with master cylinder assembly (skid control ECU) via the CAN communication line. The wheel speed sensors output voltages that vary according to the vehicle speed. The brake booster with master cylinder assembly (skid control ECU) supplies power to the wheel speed sensors. The brake booster with master cylinder assembly (skid control ECU) calculates the vehicle speed based on the pulses of the voltage.