Fail-Safe Mode

When the malfunction is detected, ECM enters fail-safe mode and the MIL lights up.

Fig 1: Displaying Fail-Safe Mode Chart

Courtesy of NISSAN MOTOR CO., U.S.A.

Engine operation condition in fail-safe mode

ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx. 5 degrees) by the return spring.