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CONTROL SYSTEM
The ECM (Engine Control Module) is incorporated into the EFI(&AT) controller housed behind the engine compartment
under the center panel of the storage compartment. The ECM performs optimal actuator control during driving by
processing data input from the sensors.
The following are the principal control items.
Control Items Description
Fuel injection control Controls the injection timing and injection amount of fuel injected by the
injectors so that the optimal amount of fuel is injected in the correct timing.
Ignition timing
control
Controls ignition of sparkplugs to optimal timing according to driving sta-
tus.
ISC control Stabilizes the idling rpm by controlling the opening of the ISC valve
according to the warm up status and air conditioner load, etc.
Fuel pump relay control Controls the fuel pump by controlling fuel pump relay.
(Radiator fan relay con-
trol)
Controls radiator fan relay, which controls the radiator cooling fan.
(AT control) Controls solenoid valve according to vehicle speed, throttle opening, shift
position, etc.
Self–diagnosis Illuminates check engine lamp when abnormalities detected in ECM input
signal, stores diagnosis result, and displays problem area by flashing of
check engine lamp.
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