Subaru 2002 Impreza Service Manual page 326

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ANTI-LOCK BRAKE SYSTEM (ABS)
ABS
H: G SENSOR
The G sensor detects changes in the vehicle's acceleration/deceleration rate in the longitudinal
direct ion.
The moving electrode of a capacitor in the sensor moves away from or close to the fixed electrode
as the vehicle accelerates or decelerates and the resulting change in the capacitance of the ca-
pacitor is outputs to the ABSCM as a change in the voltage.
1
Front
When vehicle is accelerated (A) When vehicle is cruising (8)
When vehicle is decelerated (C)
J!
Fixed electrode
\
Moving electrode
4
G sensor output voltage
I
ow
I
-1
G: Accelerated
OG: Cruising +1 G: Decelerated
1
G Sensor Output Characteristics
NF0207
ABS-20