Subaru Legacy 2002 Service Manual page 2409

DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR
ABS (Diagnostics)
No.
1 CHECK INPUT VOLTAGE OF ABSCM&H/U.
1) Turn ignition switch to OFF.
2) Disconnect connector from ABSCM&H/U.
3) Run the engine at idle.
4) Measure voltage between ABSCM&H/U
connector and chassis ground.
Connector & terminal
(F49) No. 1 (+) — Chassis ground (−):
2 CHECK GROUND CIRCUIT OF
ABSCM&H/U.
1) Turn ignition switch to OFF.
2) Measure resistance between ABSCM&H/U
connector and chassis ground.
Connector & terminal
(F49) No. 23 — Chassis ground:
3 CHECK POOR CONTACT IN CONNEC-
TORS.
4 CHECK ABSCM&H/U.
1) Connect all connectors.
2) Erase the memory.
3) Perform inspection mode.
4) Read out the DTC.
5 CHECK ANY OTHER DTC APPEARANCE.
Step
Is the voltage between 10
and 15 V?
Is the resistance less than
0.5 Ω?
Is there poor contact in
connectors between
generator, battery and
ABSCM&H/U?
Is the same DTC as in the
current diagnosis still being
output?
Are other DTC being out-
put?
ABS-108
Check Yes
Go to step 2.
Go to step 3.
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.
No
Repair harness
connector
between battery,
ignition switch and
ABSCM&H/U.
Repair
ABSCM&H/U
ground harness.
Go to step 4.
Go to step 5.
A temporary poor
contact.