Subaru IMPREZA 2002 Service Manual page 178

FRONT ABS SENSOR
ABS
Terminal No.
1 and2
C: INSPECTION
1. ABS SENSOR
1) Check the pole piece of the ABS sensor for for-
eign particles or damage. If necessary, clean the
Standard
1.25f0.25 kQ
pole piece or replace the ABS sensor.
2) Measure the ABS sensor resistance.
B4M0248
A
A
B4M2482A
2) Measure the distance "B" between the surface
where front axle housing meets the ABS sensor,
and the tone wheel.
NOTE:
Measure so that the gauge touches the tone wheel
teeth top.
I
B
(1) Axle housing
(2) Tone wheel
3) Find the gap between the ABS sensor pole face
and the surface of the tone wheel teeth by putting
the measured values in the formula below and cal-
culating.
ABS sensor clearance
=
B - A
ABS sensor standard clearance:
NOTE:
If the clearance is outside specifications, readjust.
0.3
-
0.8
mm
(0.012
-
0.031 in)
ABS-I 6