Subaru Legacy 2002 Service Manual page 2395

DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR
ABS (Diagnostics)
No.
13 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 (−):
14 CHECK INSTALLATION OF ABS SENSOR.
Tightening torque:
32±10 N·m (3.3±1.0 kgf-m, 24±7 ft-lb)
15 CHECK ABS SENSOR GAP.
Measure tone wheel to ABS sensor piece gap
over entire perimeter of the wheel.
Front wheel
0.3 — 0.8 mm (0.012 — 0.031 in)
Rear wheel
0.44 — 0.94 mm (0.0173 — 0.0370 in)
16 CHECK TONE WHEEL RUNOUT.
Measure tone wheel runout.
17 CHECK GROUND SHORT OF ABS SEN-
SOR.
1) Turn ignition switch to ON.
2) Measure resistance between ABS 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:
Step
Is the voltage less than 1
V?
Are the ABS sensor instal-
lation bolts tightened
securely?
Is the gap within the speci-
fications?
Is the runout less than 0.05
mm (0.0020 in)?
Is the resistance more than
1 MΩ?
ABS-94
Check Yes
Go to step 14.
Go to step 15.
Go to step 16.
Go to step 17.
Go to step 18.
No
Repair harness
between
ABSCM&H/U and
ABS sensor.
Tighten ABS sen-
sor installation
bolts securely.
Adjust the gap.
NOTE:
Adjust the gap
using spacers
(Part No.
26755AA000). If
spacers cannot
correct the gap,
replace worn sen-
sor or worn tone
wheel.
Replace tone
wheel. Front:
<Ref. to ABS-20,
Front Tone
Wheel.> Rear:
<Ref. to ABS-21,
Rear Tone
Wheel.>
Replace ABS sen-
sor and
ABSCM&H/U.
Front: <Ref. to
ABS-12, Front
ABS Sensor.>
Rear: <Ref. to
ABS-15, Rear
ABS Sensor.> and
<Ref. to ABS-6,
ABS Control Mod-
ule and Hydraulic
Control Unit
(ABSCM&H/U).>