Subaru Legacy 2002 Service Manual page 2431

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) Turn ignition switch to ON.
4) Measure voltage between ABSCM&H/U
connector and chassis ground.
Connector & terminal
(F49) No. 25 (+) — Chassis ground (−):
2 CHECK GROUND CIRCUIT OF MOTOR.
1) Turn ignition switch to OFF.
2) Measure resistance between ABSCM&H/U
connector and chassis ground.
Connector & terminal
(F49) No. 26 — Chassis ground:
3 CHECK MOTOR OPERATION.
Operate the sequence control. <Ref. to
ABS-9, ABS Sequence Control.>
NOTE:
Use the diagnosis connector to operate the
sequence control.
4 CHECK POOR CONTACT IN CONNEC-
TORS.
Turn ignition switch to OFF.
5 CHECK ABSCM&H/U.
1) Connect all connectors.
2) Erase the memory.
3) Perform inspection mode.
4) Read out the DTC.
6 CHECK ANY OTHER DTC APPEARANCE.
Step
Is the voltage between 10
and 13 V?
Is the resistance less than
0.5 Ω?
Can motor revolution noise
(buzz) be heard when car-
rying out the check
sequence?
Is there poor contact in
connector between hydrau-
lic unit, relay box and
ABSCM&H/U?
Is the same DTC as in the
current diagnosis still being
output?
Are other DTC being out-
put?
ABS-130
Check Yes
Go to step 2.
Go to step 3.
Go to step 4.
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
and ABSCM&H/U
and check fuse
SBF6.
Repair
ABSCM&H/U
ground harness.
Replace
ABSCM&H/U.
<Ref. to ABS-6,
ABS Control Mod-
ule and Hydraulic
Control Unit
(ABSCM&H/U).>
Go to step 5.
Go to step 6.
A temporary poor
contact.