Subaru Legacy 2002 Service Manual page 2393

DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR
ABS (Diagnostics)
No.
1 CHECK OUTPUT OF ABS SENSOR USING
SELECT MONITOR.
1) Select "Current data display & Save" on
the select monitor.
2) Read the ABS sensor output corresponding
to the faulty system in the select monitor data
display mode.
2 CHECK INSTALLATION OF ABS SENSOR.
Tightening torque:
32±10 N·m (3.3±1.0 kgf-m, 24±7 ft-lb)
3 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)
4 CHECK TONE WHEEL RUNOUT.
Measure tone wheel runout.
5 CHECK POOR CONTACT IN CONNEC-
TORS.
Turn ignition switch to OFF.
6 CHECK ABSCM&H/U.
1) Connect all connectors.
2) Erase the memory.
3) Perform inspection mode.
4) Read out the DTC.
7 CHECK ANY OTHER DTC APPEARANCE.
8 CHECK ABS SENSOR.
1) Turn ignition switch to OFF.
2) Disconnect connector from ABS sensor.
3) Measure resistance of ABS sensor connec-
tor terminals.
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:
Step
Does the speed indicated
on the display change in
response to the speedom-
eter reading during
acceleration/deceleration
when the steering wheel is
in the straight-ahead posi-
tion?
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 there poor contact in
connectors between
ABSCM&H/U and ABS
sensor?
Is the same DTC as in the
current diagnosis still being
output?
Are other DTC being out-
put?
Is the resistance between 1
and 1.5 kΩ?
ABS-92
Check Yes
Go to step 2.
Go to step 3.
Go to step 4.
Go to step 5.
Repair connector.
Replace
ABSCM&H/U.
<Ref. to ABS-6,
ABS Control Mod-
ule and Hydraulic
Control Unit
(ABSCM&H/U).>
Proceed with the
diagnosis corre-
sponding to the
DTC.
Go to step 9.
No
Go to step 8.
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.>
Go to step 6.
Go to step 7.
A temporary poor
contact.
NOTE:
Check harness
and connectors
between
ABSCM&H/U and
ABS sensor.
Replace ABS sen-
sor. Front: <Ref.
to ABS-12, Front
ABS Sensor.>
Rear: <Ref. to
ABS-15, Rear
ABS Sensor.>