SsangYong Stavic / SsangYong Rodius (2005 year). Manual — part 415
ABS/ESP SYSTEM
STAVIC - 2004.09
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Working voltage
Max. output current
Detected max. angular velocity
Working temperature
Supplying voltage
When short
When short to sensor
Output voltage (HI)
Output voltage (LO)
9 ~ 16 V
10 mA
1500°/S
-30 ~ 75°C
9 ~ 16 V(battery voltage)
0V
Power voltage - 0.7 V
Approx. 3.50 V (3.0 ~ 4.1 V)
Approx. 1.50 V (1.3 ~ 2.0 V)
SWAS : Steering Wheel Angle Sensor
The steering wheel angle sensor is located between clock spring and multifunction switch. This sensor is used for
recognition of driver’s intends. If the sensor is replaced with new one, it can detect the neutral position after the vehicle
is moving over 20 km/h for more than 5 seconds.
1. Clock spring
2. Multi-function switch
3. SWAS (Steering Wheel Angle Sensor)
Specifications
Descriptions
Specifications
ABS/ESP SYSTEM
STAVIC - 2004.09
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LED
Phototransistor
Steering column
Slotted plate
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 ESP 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.
Center line of steering wheel
Working voltage
Duty
Low - V
Number of pulse
per revolution
High - V
STN
Detects the center value
of steering wheel
ST1 and ST2
Detects steering wheel
angle and angular veloc-
ity as an average value
9 ~16 V
Approx. 50 %
1.3 ~ 2.0 V
45 Pulses /1rev
3.0 ~ 4.1 V
Steering wheel angle
sensor connector
Steering wheel angle
Steering
Wheel
Angle
Sensor
(SWAS)
ESP
unit
With ESP
ABS/ESP SYSTEM
STAVIC - 2004.09
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EFFECTIVE DATE
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Sensor Cluster
The lateral sensor, logitudinal sensor and the yaw rate sensor are important components of the Electronic Stability
Program. The cluster links these sensors to an on-board computer unit and to a CAN interface, incased in a sturdy
housing, that is mounted on the chassis. Its modular concept allows the integration of further sensor functions.
Power supply
ECU
Power supply
circuit
Micro controller
(self diagnosis)
CAN module
Sensor cluster
A/D converter
Yaw rate sensor
Lateral sensor
Longitudinal sensor
CAN
Internal Electric Circuit of Sensor Cluster
Location
ABS/ESP SYSTEM
STAVIC - 2004.09
46
4K
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EFFECTIVE DATE
AFFECTED VIN
Specification
Specifications
Approx. 8 ~ 16 V
Approx. 2.5 V (Ignition switch “ON”)
0.2 ~ 4.8 V
-75°/s ~ +75°/s
Descriptions
Supplying voltage
Output voltage when stop
Output range
Operation start speed
Sensor Cluster Circuit
(sensor cluster: yaw rate sensor + lateral acceleration sensor + Longitudinal acceleration sensor)
The yaw rate sensor relies on the action of micro-scopic tun-
ing forks. The plane in which these forks vibrate shifts when
the car turns around its vertical axis. This shift is evaluated
electronically.
A faulty yaw rate sensor produces an output signal of 0 V.
Yaw Rate Sensor
Power
Ground
Power
Sensor cluster
ESP unit
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