Subaru Impreza 2002 Service Manual page 2773

ABS
5) Place a thickness gauge between ABS sensor's
and tone wheel's tooth face. After standard clear-
ance is obtained over the entire perimeter, tighten
the ABS sensor on rear arm to specified torque.
ABS sensor standard clearance:
0.7 — 1.2 mm (0.028 — 0.047 in)
Tightening torque:
32 N·m (3.3 kgf-m, 24 ft-lb)
CAUTION:
Check the marks on the harness to make sure
that no distortion exists. (RH: white, LH: yellow)
NOTE:
If the clearance is outside specifications, readjust.
6) After confirmation of the ABS sensor clearance,
connect the connector to ABS sensor.
7) Connect the battery ground cable to battery.
C: INSPECTION
1. ABS SENSOR
1) Check the pole piece of ABS sensor for foreign
particles or damage. If necessary, clean the pole
piece or replace ABS sensor.
2) Measure the ABS sensor resistance.
Terminal No.
1 and 2
CAUTION:
• If resistance is outside the standard value, re-
place the ABS sensor with a new one.
• Check the marks on the harness to make sure
that no distortion exists.
RH: Light blue
LH: Brown
NOTE:
Check the ABS sensor cable for discontinuity. If
necessary, replace with a new one.
REAR ABS SENSOR
B4M0248
Standard
1.0±0.2 kΩ
ABS-18
2. SENSOR GAP
Clearances (sensor gaps) should be measured one
by one to ensure that tone wheel and speed sensor
are installed correctly.
NOTE:
• If clearance is narrow, adjust by using spacer
(Part No. 26755AA000).
• If clearance is wide, check the outputted voltage
then replace the ABS sensor or tone wheel if the
outputted voltage is outside specification.
ABS sensor clearance:
0.7 — 1.2 mm (0.028 — 0.047 in)
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.
NOTE:
Regarding terminal No., please refer to item 1. ABS
SENSOR.
Tone wheel
ABS sensor
Sensor gap
BR0002
H4M1141A