SSANGYONG Kyron Repair Manual page 428

42
4890
Steering wheel angle
sensor connector
Steering wheel angle sensor
The steering wheel angle sensor is integrated with the phototransistor and the LED and there is a slotted plate
between them. When the inner slotted plate rotates with the steering column shaft when the steering wheel is
turned, the voltage occurs through the holes. The detected voltage will be transmitted to the ECS unit as a pulse
from the 3 terminals. Then, the two voltage pulses are used to get the average value for detecting the steering wheel
position and its angle speed. And the other pulse is used for checking the alignment of the steering wheel.
Working
9 ~ 16 V
voltage
Number of
pulse per 45 Pulses /1 rev
revolution
Approx. 50 %
Duty
High - V 3.0 ~ 4.1 V
Low - V 1.3 ~ 2.0 V
Detects steering wheel
ST1 and
angle and angular velocity
ST2
as an average value
Detects the center value
STN
of steering wheel
ABS/ESP SYSTEM
KYRON SM - 2005.09
Steering
Wheel
Angle
Sensor
(SWAS)
V
ST1
V
V
ST2
V
V
STN
V
LED
Steering
column
IGN1
ESP
STN
H
E
ST2
C
U
ST1
Ground
High
Low
High
Low
High
Low
Center line of
steering wheel
Phototransistor
Slotted plate
2 °
CHANGED BY
EFFECTIVE DATE
AFFECTED VIN