5-6
EMS(Engine Management System)
FAIL-SAFE FUNCTION
If the ECU checks something wrong , the vehicle can be driven by its fail safe function.
However, if there are something wrong in fuel pump, injector, crank position sensor, the engine operation
can be impossible.
If there is something wrong in the EMS, it has fail safe function in order for engine to
work and to cover a minimum driving of vehicle.
: MIL on/off
INTAKE
MIL
INTAKE
: MIL on
on
INTAKE
INTAKE
The value of intake pressure is fixed as the
pressure just before when the intake pressure
sensor is out of order.
intake
intake
The value of intake temperature is fixed as a
temperature just before when the intake
pressure sensor is out of order.
!
CAUTION
△
If the MIL on and blink, starting and driving are temporary by fail safe
function, but, because the conditions of engine operation are not perfect, this can be used in an urgent case.
In this case, safe repairing of vehicle shall be required.
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