Lateral/Longitudinal Acceleration Sensor - SSANGYONG 2004 Rexton 2.7XDi Workshop Manual

8E2-28
CHANGED BY
EFFECTIVE DATE
AFFECTED VIN

(6) Lateral/Longitudinal acceleration sensor

These sensors sense the lateral/longitudinal acceleration of
the vehicle and located in sensor cluster. For 4WD vehicle,
the longitudinal sensor is located in sensor cluster and the
functions are same only except the direction. The lateral ac-
celeration sensor detects the movement of lateral direction
and the longitudinal acceleration sensor detects the movement
of longitudinal direction (driving direction).
Between two electrically charged stationary plates having the
same polarity, an electrically charged silicon element having
the opposite polarity is attached to the end of a cantilever arm.
Between these three plates, two electric fields are generated
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by the capacitors C1 and C2. The capacitances of C1 and C2
change in response to lateral acceleration. This change can
be used to calculate the direction and amount of lateral/longi-
tudinal acceleration acting on the vehicle. For 0 g lateral
acceleration, the sensor produces an output signal with a volt-
age of 2.5 V.
The signal of the lateral acceleration sensor alone cannot trig-
ger an ESP intervention.
The ESP sensor cluster can be considered as one module.
The measured value by lateral/longitudinal and yaw rate sen-
sors is transmitted to ESP unit via two CAN lines.
The supplied voltage from ESP unit is approx. 5 V with ignition
key "ON" and the output range through CAN line is approx.
0.2 to 4.8 V.
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When a sensor is faulty, the sensor cluster produces an out-
put signal of 0 V (fail safe function).
ESP SYSTEM
REXTON SM - 2004.4