Mitsubishi Lancer Evolution-VII Workshop Manual page 65

2-20
ELECTRONIC CONTROL SYSTEM
THROTTLE POSITION SENSOR
For detecting the throttle valve opening angle. Also used as throttle position sensor for engine control.
LONGITUDINAL G SENSOR/LATERAL G SENSOR
The longitudinal G sensor are sensors detecting the acceleration in the longitudinal directions of the
vehicle, and are basically the same as those used conventionally.
The lateral G sensor is used for detecting the acceleration along the sides of the vehicle by changing
the installing direction by 90° . The same sensor as the longitudinal G sensor is used.
Parking brake lever
Lateral G sensor
STEERING WHEEL SENSOR
The steering wheel sensor is installed at the steering column, and is used to output steer angles to
the 4WD-ECU as signals.
It is composed of the slit plate which rotates according to the movements of the handle and a three-set
photointerruptor. The slit plate and photointerruptor have a sealed integrated structure to prevent the
invasion of foreign particles as well as misoperations by external light. To detect malfunctions of the
sensor output circuit, it is equipped with a zener diode for detecting disconnections parallel to the
phototransistor.
The ECU calculates the steering angle by reading the signals of the steering wheel sensor after every
certain period of time and calculating the total of the ST-1 signal and ST-2 signal.
The steering angle is obtained by taking the neutral position (ST-N output is L center) as 0° , and if
there are changes, the steering angle is added with 2° for right and - 2° for left. The output of the
photointerruptor becomes L (low) when light passes through and H (high) when obstructed.
POWER TRAIN - ACD and AYC
Longitudinal
G sensor
G-sensor output characteristics
Output voltage (V)
4.0
3.5
1.5 1.0
Acceleration speed
(G)
2.5
1.5
1.0
0 1.0 1.5
Deceleration speed
(G)