The Fuel-Shut Off Function

The fuel-shut off function secures occupant's safety.

ECM or FPCM controls the fuel-shut off function according to the following sensors and signals.

• Throttle position sensor 1 and 2 (Throttle valve position)
• ECM (Engine speed)

ECM or FPCM performs the fuel shut-off function when detecting the conditions below.

• Mechanical malfunction in throttle position sensor 1 and 2
• Abnormal engine speed signal

Mechanical Malfunction in Throttle Valve Actuator 

When detecting a mechanical malfunction in the throttle valve according to signals from throttle position sensor 1 and 2, ECM controls the operation of the fuel injector and controls engine speed as follows.

• At idle: 1, 400 rpm
• At driving: 1, 800 rpm

Abnormal Engine Speed Signal 

FPCM controls the operation of the fuel pump when an engine speed signal is not transmitted from ECM.