VERACRUZ(EN) >2007 > G 3.8 DOHC > Brake System > ESP(Electronic Stability Program) System > Steering Angle Position Sensor>Description and Operation  
DESCRIPTION
The steering angle speed sensor detects the angle of the steering wheel in order to which direction a user chooses.The sensor is detached on the MPS(Mutil-Function Switch) under the steering wheel.
MEASUREING PRINCIPLE
The split of the steering angle sensor detects a steering angle of the steering wheel by a ON/OFF pulse caused by whether or not the LED lights go through the hole of the split, rotating as the steering wheel revolves. There are three LEDs, two(ST1, ST2) for detecting a steering direction, and the other for the neutral position.The HECU calculates the steering angle by the pulse from the steering angle sensor.

SPECIFICATION
Description
 Specification
Operating voltage
 9 ~ 16V
Operating temperature
 -30 ~ 75°C
Current consumption
 Max.100mA
Steering angle velocity
 Max. ± 1500°/sec
Voltage(high)
 3.0V ~ 4.1V
Voltage(low)
 1.3V ~ 2.0V
Pulse duty
 40 ~ 60%

CIRCUIT DIAGRAM( STEERING WHEEL SPEED ANGLE SENSOR)

OUTPUT CHARACTERISTIC

No.
 INPUT
 OUTPUT
 Steering direction
 Remark
1
 ST1
 L
 L
 Right
ST2
 L
 H
ST1
 L
 H
 Left
ST2
 L
 L
2
 ST1
 L
 L
 Left
ST1
 H
 L
ST1
 L
 H
 Right
ST2
 H
 H
3
 ST1
 H
 H
 Left
ST2
 L
 H
ST1
 H
 L
 Right
ST2
 L
 L
4
 ST1
 H
 H
 Right
ST2
 H
 L
ST1
 H
 L
 Left
ST2
 H
 H