101
AIR INTAKE SYSTEM
Air that has been filtered by the air cleaner passes through the throttle body and is distributed to the intake manifold
of each cylinder. The intake air amount is indirectly measured by measuring the intake air pressure using the pressure
sensor.
When the throttle valve is fully closed, air necessary for idling rpm is supplied to the intake manifold through the ISC
valve.
The ISC valves uses a stepper motor type ISC valve, which changes the opening of the bypass passage under control
of the ECM so that the idling rpm remains constant. When the cooling water temperature is low, the idling speed is raised
by opening the bypass passage using the ISC valve.
3
4
5
6
2
1
2
3
1
4
1. AIR CLEANER
2. AIR CLEANER HOSE
3. THROTTLE BODY
4. ISC VALVE
5. THROTTLE VALVE
6. INTAKE MANIFOLD
INTAKE AIR
BYPASS AIR
1. THROTTLE BODY
2. PRESSURE SENSOR
3. THROTTLE SENSOR
4. ISC VALVE
Throttle Body
The throttle body adjusts the intake air amount using a
throttle valve, which is linked with the accelerator pedal,
and is composed of the throttle sensor, which detects the
throttle valve opening, a pressure sensor, which indirectly
measures the intake air pressure, and an ISC valve, which
stabilizes the idling by adjusting the bypass air amount.
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