SSANGYONG RODIUS 2005.07 Manual page 158

09-12
0452-01
4. INDUCTION SYSTEM
1) Throttle Valve Actuator
The throttle actuator is actuated by the Engine Control Module(ECM) according to the position
of the accelerator pedal position.
It has two potentiometers which signal the position of the throttle valve to the ECM to enable it
to recognize the various engine load states.
▶
Ignition "OFF"
In the de-energized states the throttle valve position is determined to be spring capsule.
▶ Ignition "ON"
When the ignition S/W on the servo motor in the throttle actuator is operated by the ECM.
The throttle valve adopts a position in line with the coolant temperature.
▶ Closed Position
In the closed throttle position, the servo motor controls engine speed by operating the throttle
valve further (greater mixture) or closing it further (reduced mixture), depending on coolant
temperature and engine load.
When this is done, the throttle valve can be closed further by the servo motor overcoming the
force of the spring capsule (mechanical end stop).
If the actuator is deenergized, the throttle valve is resting against the spring capsule.
Consequently, the throttle valve opening is a constant 10 ~ 12°
At no load, this produces an engine speed of about 1,800 rpm
ENGINE CONTROL SYSTEM
RODIUS 2005.07
approximately.