Subaru Legacy III (2000-2003 year). Manual - part 694

ABS-16

ABS

REAR ABS SENSOR

8) When inspecting rear tone wheel, remove rear
drive shaft as rear tone wheel is unitized with BJ as-
sembly of rear drive shaft.
<Ref. to DS-34, REMOVAL, Rear Drive Shaft.>

CAUTION:
• Be careful not to damage pole piece located
at tip of the sensor and teeth faces during re-
moval.
• Do not pull sensor harness during removal.

B: INSTALLATION

1) Install rear drive shaft to the vehicle.
<Ref. to DS-34, INSTALLATION, Rear Drive
Shaft.>
2) Temporarily install rear ABS sensor on rear arm.

CAUTION:
Be careful not to strike ABS sensor's pole piece 
and tone wheel's teeth against adjacent metal 
parts during installation.

3) Install rear sensor harness brackets in the origi-
nal positions and install harness on the clip.

Tightening torque:

33 N·m (3.3 kgf-m, 24 ft-lb)

Tightening torque:

33 N·m (3.3 kgf-m, 24 ft-lb)

ABS00169

ABS00168

ABS00167

ABS00170

ABS00165

ABS-17

ABS

REAR ABS SENSOR

4) 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
ABS sensor on rear arm to specified torque.

ABS sensor standard clearance:

0.44 — 0.94 mm (0.0173 — 0.0370 in)

Tightening torque:

33 N·m (3.3 kgf-m, 24 ft-lb)

CAUTION:
Check the marks on the harness to make sure 
that no distortion exists.

NOTE:
If the clearance is outside specifications, adjust the
gap using spacer (Part No. 26755AA000).
5) After confirmation of the ABS sensor clearance,
connect connector to ABS sensor and install fuel
tank cover.

6) Connect connector to battery ground cable.

C: INSPECTION

1. ABS SENSOR

1) Check pole piece of ABS sensor for foreign par-
ticles or damage. If necessary, clean pole piece or
replace ABS sensor.
2) Measure ABS sensor resistance.

CAUTION:
If resistance is outside the standard value, re-
place ABS sensor with new one.

NOTE:
Check ABS sensor cable for discontinuity. If neces-
sary, replace with a new one.

LH

RH

Mark

Yellow

White

ABS00163

Terminal No.

Standard

1 and 2

1.25

±

0.25 k

Ω

ABS00143

2 1

ABS-18

ABS

REAR ABS SENSOR

2. SENSOR GAP

1) Measure the distance “A” between ABS sensor
surface and sensor pole face.

2) Measure the distance “B” between surface
where the front axle housing meets the ABS sen-
sor, and the tone wheel.

NOTE:
Measure so that the gauge touches the tone wheel
teeth top.

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:

0.44 — 0.94 mm (0.0173 — 0.0370 in)

NOTE:
If the clearance is outside specifications, adjust the
gap using spacer (Part No. 26755AA000).

3. OUTPUT VOLTAGE

Output voltage can be checked by the following
method. Install resistor and condenser, then rotate
wheel about 2.75 km/h (2 MPH) or equivalent.

NOTE:
Regarding terminal No., refer to item 1. ABS SEN-
SOR.

D: ADJUSTMENT

Adjust the gap using spacer (Part No.
26755AA000).

(1) Axle housing

(2) Tone wheel

ABS00161

A

ABS00145

B

( 1 )

( 2 )

(1) Standard output voltage:

Approx. 120 mV (When it is 10 Hz)

(2) To terminal

(3) Oscilloscope

ABS00162

10 Hz

3.9 k

14.7 k

10 nF

+60 mV

0

–60 mV

100 k

( 1 )

( 2 )

( 2 )

( 3 )

ABS-19

ABS

FRONT TONE WHEEL

6. Front Tone Wheel

A: REMOVAL

Refer to Front Drive Shaft, because front tone
wheel is integrated with front drive shaft.
<Ref. to DS-28, REMOVAL, Front Drive Shaft.>

B: INSTALLATION

Refer to Front Drive Shaft, because front tone
wheel is integrated with front drive shaft.
<Ref. to DS-28, INSTALLATION, Front Drive
Shaft.>

C: INSPECTION

Visually check tone wheels teeth (44 pieces) for
cracks or dents. If necessary, replace tone wheel
with a new one.

NOTE:
Replace BJ assembly with new one as a single unit
if there are any defects found on tone wheel is unit-
ized with BJ assembly of drive shaft.