Subaru Legacy 2003 Service Manual page 2833

DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR
ABS (DIAGNOSTICS)
5 CHECK BATTERY SHORT OF HARNESS.
Measure voltage between ABSCM&H/U con-
nector and chassis ground.
Connector & terminal
DTC 21 / (F49) No. 11 (+) — Chassis
ground ( − − − − ):
DTC 23 / (F49) No. 9 (+) — Chassis
ground ( − − − − ):
DTC 25 / (F49) No. 14 (+) — Chassis
ground ( − − − − ):
DTC 27 / (F49) No. 7 (+) — Chassis
ground ( − − − − ):
Is the measured value less than the specified
value?
6 CHECK BATTERY SHORT OF HARNESS.
1) Turn ignition switch to ON.
2) Measure voltage between ABSCM&H/U
connector and chassis ground.
Connector & terminal
DTC 21 / (F49) No. 11 (+) — Chassis
ground ( − − − − ):
DTC 23 / (F49) No. 9 (+) — Chassis
ground ( − − − − ):
DTC 25 / (F49) No. 14 (+) — Chassis
ground ( − − − − ):
DTC 27 / (F49) No. 7 (+) — Chassis
ground ( − − − − ):
Is the measured value less than the speci-
fied value?
7 CHECK INSTALLATION OF ABS SENSOR.
Turn ignition switch to OFF.
Are the ABS sensor installation bolts tightened
with the specified torque?
8 CHECK ABS SENSOR GAP.
Measure tone wheel to ABS sensor piece gap
over entire perimeter of the wheel.
Is the measured value within the specified
range?
9 CHECK TONE WHEEL RUNOUT.
Measure tone wheel runout.
Is the measured value less than the specified
value?
Step Value
1 V
1 V
33 N·m (3.4 kgf-m, 25 ft-lb)
Front wheel 0.3 — 0.8 mm
(0.012 — 0.031 in) and Rear
wheel 0.44 — 0.94 mm
(0.0173 — 0.0370 in)
0.05 mm (0.0020 in)
ABS-42
Yes
Go to step 6. Repair harness
between
ABSCM&H/U and
ABS sensor.
Go to step 7. Repair harness
between
ABSCM&H/U and
ABS sensor.
Go to step 8. Tighten ABS sen-
sor installation
bolts securely.
Go to step 9. Adjust the gap.
NOTE:
Adjust the gap us-
ing spacers (Part
No. 26755AA000).
If spacers cannot
correct the gap, re-
place worn sensor
or worn
wheel.
Go to step 10. Replace tone
wheel. Front:
<Ref. to ABS-19,
Front Tone
Wheel.> Rear:
<Ref. to ABS-20,
Rear Tone
Wheel.>
No
tone