Subaru Impreza 2003 Service Manual page 2331

2) Measure the distance "B" between surface
where the front axle housing meets the ABS wheel
speed sensor, and the tone wheel.
NOTE:
Measure so that the gauge touches the tone wheel
teeth top.
B
(1) Axle housing
(2) Tone wheel
3) Find the gap between the ABS wheel speed sen-
sor pole face and the surface of the tone wheel
teeth by putting the measured values in the formula
below and calculating.
ABS wheel speed sensor clearance = B − − − − A
ABS wheel speed sensor standard clearance:
0.3 — 0.8 mm (0.012 — 0.031 in)
NOTE:
If the clearance is out of specification, readjust us-
ing spacer (Part No. 26755AA000).
FRONT ABS WHEEL SPEED SENSOR
(1)
(2)
ABS00145
ABS-15
3. OUTPUT VOLTAGE
Output voltage can be checked by the following
method. Install the resistor and condenser, then ro-
tate the wheel about 2.75 km/h (2 MPH) or equiva-
lent.
Output voltage specification:
0.12 to 1 V (at 20 Hz)
NOTE:
Regarding terminal No., please refer to item 1. ABS
WHEEL SPEED SENSOR. <Ref. to ABS-14, ABS
WHEEL SPEED SENSOR, INSPECTION, Front
ABS Wheel Speed Sensor.>
60 mV
0
60 mV
20 Hz
17.8 K
(2)
(2)
(1) Oscilloscope
(2) Terminal
D: ADJUSTMENT
Adjust the gap using spacer (Part No. 26755A000).
ABS
(1)
5 % 562 5 %
ABS00146