Symptoms

- Engine Light ON (or Service Engine Soon Warning Light)

Possible Causes

- Brake Pedal Switch harness is open or shorted - Brake Pedal Switch circuit poor electrical connection - Faulty Brake Pedal Switch - Faulty stop lamp switch - Faulty Engine Control Moduele (ECM)

When Detected

When the vehicle speed is above 30 km/h (19 MPH), ON signals from the stop lamp switch and the Automatic Speed Control Device (ASCD) brake switch are sent to the The Engine Control Moduele (ECM) at the same time.

Description

When the brake pedal is depressed, Automatic Speed Control Device (ASCD) brake switch is turned OFF and stop lamp switch is turned ON. The Engine Control Moduele (ECM) detects the state of the brake pedal by this input of two kinds (ON/OFF signal).