Subaru Forester 2004 Service Manual page 59

Diagnostics Procedure without Diagnostic Trouble Code (DTC)
ABS (DIAGNOSTIC)
Step
6 CHECK DAMAGE OF THE ABS WHEEL
SPEED SENSOR OR THE TONE WHEEL.
7 CHECK THE TONE WHEEL RUNOUT.
Measure the tone wheel runout.
8 CHECK RESISTANCE OF ABS WHEEL
SPEED SENSOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from ABS wheel
speed sensor.
3) Measure the resistance between ABS
wheel speed sensor connector terminals while
shaking the harness lightly.
Terminal
Front RH No. 1 — No. 2:
Front LH No. 1 — No. 2:
Rear RH No. 1 — No. 2:
Rear LH No. 1 — No. 2:
9 CHECK GROUND SHORT OF ABS WHEEL
SPEED SENSOR.
Measure the resistance between ABS wheel
speed sensor and chassis ground.
Terminal
Front RH No. 1 — Chassis ground:
Front LH No. 1 — Chassis ground:
Rear RH No. 1 — Chassis ground:
Rear LH No. 1 — Chassis ground:
Check
Are there broken or damaged
in the ABS wheel speed sen-
sor piece or the tone wheel?
Is the runout less than 0.05
mm (0.0020 in)?
Is the resistance the following
value?
Front: 1 — 1.5 kΩ
Rear: 1.025 — 1.265 kΩ
Is the resistance more than 1
MΩ?
ABS-58
Yes
Replace the ABS Go to step 7.
wheel speed sen-
sor or the tone
wheel. Front: <Ref.
to ABS-15, Front
ABS Wheel Speed
Sensor.> Rear:
<Ref. to ABS-18,
Rear ABS Wheel
Speed Sensor.>
Front: <Ref. to
ABS-21, Front
Tone Wheel.>
Rear: <Ref. to
ABS-22, Rear
Tone Wheel.>
Go to step 8. Replace the tone
wheel. Front: <Ref.
to ABS-21, Front
Tone Wheel.>
Rear: <Ref. to
ABS-22, Rear
Tone Wheel.>
Go to step 9. Replace the ABS
wheel speed sen-
sor. Front: <Ref. to
ABS-15, Front
ABS Wheel Speed
Sensor.> Rear:
<Ref. to ABS-18,
Rear ABS Wheel
Speed Sensor.>
Go to step 10. Replace the ABS
wheel speed sen-
sor. Front: <Ref. to
ABS-15, Front
ABS Wheel Speed
Sensor.> Rear:
<Ref. to ABS-18,
Rear ABS Wheel
Speed Sensor.>
No