Mitsubishi LANCER EVOLUTION-VII 2001 Technical Information Manual page 66

Steering wheel sensor
Photointerruptor
(ST-2)
Photointerruptor
(ST-1)
<Front>
Wheel speed sensor
<Rear>
Wheel speed sensor
POWER TRAIN - ACD and AYC
Output waveform of each sensor
Slit
Slit plate
Neutral position
detection slit
Photointerruptor
(ST-N)
WHEEL SPEED SENSOR
Sensor for detecting each wheel speed. It is the same as
that conventionally adopted for the ABS. For vehicle with
ACD and
waveform-shaped by the ABS-ECU is input to the 4WD-ECU.
N (Neutral point)
V
H
4°
ST-1
L
V
H
4° 4°
ST-2
L
V
H
11°
ST-N
L
Light-emitting diode
AYC, the wheel
2-21
2°
4°
θ
θ
θ
Slit plate
Zener diode
for disconnec-
tion detection
Photo-transistor
speed sensor signal