Fail-Safe System

AIR FLOW METER MALFUNCTION
If the air flow meter output voltage is above or below the specified value, the E.C.U. senses an air flow meter malfunction. In case of a malfunction, the throttle sensor substitutes for the air flow meter. Though air flow meter is malfunctioning, it is possible to drive the vehicle and start the engine. But engine speed will not rise more than 2,400 rpm in order to inform the driver of fail-safe system operation while driving.





ENGINE TEMPERATURE SENSOR MALFUNCTION
When engine temperature sensor output voltage is below or above the specified value, water temperature is fixed at the preset value as follows:

Operation

THROTTLE SENSOR MALFUNCTION When throttle sensor output voltage is below or above the specified value, throttle sensor output is fixed at the preset value.

AIR TEMPERATURE SENSOR MALFUNCTION When air temperature sensor is below or above the specified value, air temperature value is fixed at the preset value [20~C (68~F)].