Subaru Forester 2004 Service Manual page 65

Diagnostics Procedure without Diagnostic Trouble Code (DTC)
ABS (DIAGNOSTIC)
Step
1 CHECK IF THE WHEELS HAVE TURNED
FREELY FOR A LONG TIME.
Check if the wheels have been turned freely for
more than 1 minute, such as when vehicle is
jacked-up, under full-lock cornering or when
tire is not in contact with road surface.
2 CHECK TIRE SPECIFICATIONS.
Turn the ignition switch to OFF.
3 CHECK WEAR OF TIRE.
4 CHECK TIRE PRESSURE.
5 CHECK INSTALLATION OF ABS WHEEL
SPEED SENSOR.
6 CHECK ABS WHEEL SPEED SENSOR GAP.
Measure the tone wheel to ABS wheel speed
sensor piece gap over entire perimeter of the
wheel.
7 PREPARE OSCILLOSCOPE.
Check
Have the wheels been turned
freely?
Are the tire specifications cor-
rect?
Is the tire worn excessively?
Is the tire pressure correct?
Are the ABS wheel speed sen-
sor installation bolts tightened
33 N·m (3.4 kgf-m, 24.6 ft-lb)?
Is the gap the following value?
Front wheel:
0.3 — 0.8 mm
(0.012 — 0.031 in)
Rear wheel:
0.7 — 1.2 mm
(0.028 — 0.047 in)
Is an oscilloscope available?
ABS-64
Yes
The ABS is nor- Go to step 2.
mal. Erase the
DTC.
NOTE:
When the wheels
turn freely for a
long time, such as
when the vehicle is
towed or jacked-
up, or when steer-
ing wheel is contin-
uously turned all
the way, this DTC
may sometimes
occur.
Go to step 3. Replace the tire.
Replace the tire. Go to step 4.
Go to step 5. Adjust tire pres-
sure.
Go to step 6. Tighten the ABS
wheel speed sen-
sor installation
bolts securely.
Go to step 7. Adjust the gap.
NOTE:
Adjust the gap us-
ing spacer (Part
No. 26755AA000).
If the spacer can-
not correct gap, re-
place worn ABS
wheel speed sen-
sor or worn tone
wheel.
Go to step 8. Go to step 9.
No