Subaru Legacy 2002 Service Manual page 2370

DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR
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 (−):
(F49) No. 24 (+) — 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 VALVE RELAY IN ABSCM&H/U.
Measure resistance between ABSCM&H/U
and terminals.
Terminals
No. 23 (+) — No. 24 (−):
4 CHECK POOR CONTACT IN CONNEC-
TORS.
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 15 V?
Is the resistance less than
0.5 Ω?
Is the resistance more than
1 MΩ?
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-69
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.
ABS (Diagnostics)
No
Repair harness
connector
between battery
and ABSCM&H/U.
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.