Subaru Forester 2004 Service Manual page 101

Diagnostics Procedure with Diagnostic Trouble Code (DTC)
ABS (DIAGNOSTIC)
Step
1 CHECK WIRING HARNESS.
1) Turn the ignition switch to OFF.
2) Disconnect the connector (B38) from con-
nector (i3).
3) Turn ignition switch to ON.
2 CHECK PROJECTION AT ABSCM&H/U.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from ABSCM&
H/U.
3 CHECK ABSCM&H/U.
Measure the resistance between ABSCM&H/U
terminals.
Terminals
No. 22 — No. 23:
4 CHECK WIRING HARNESS.
Measure the resistance between connector
and chassis ground.
Connector & terminal
LHD: (B301) No. 22 — Chassis ground:
RHD: (F49) No. 22 — Chassis ground:
5 CHECK WIRING HARNESS.
1) Connect the connector to ABSCM&H/U.
2) Measure the resistance between connector
and chassis ground.
Connector & terminal
LHD: (B301) No. 22 — Chassis ground:
RHD: (F49) No. 22 — Chassis ground:
6 CHECK POOR CONTACT IN ABSCM&H/U
CONNECTOR.
Check
Does the ABS warning light
turn on?
Is there any damage on projec-
tion?
Is the resistance more than 1
MΩ?
Is the resistance less than 0.5
Ω?
Is the resistance more than 1
MΩ?
Is there poor contact in
ABSCM&H/U connector?
ABS-100
Yes
Go to step 2. Repair the front
wiring harness.
Replace the Go to step 3.
ABSCM only.
<Ref. to ABS-8,
ABSCM (ABS
CONTROL MOD-
ULE), REPLACE,
ABS Control Mod-
ule and Hydraulic
Control Unit
(ABSCM&H/U).>
Go to step 4. Replace the
ABSCM only.
<Ref. to ABS-8,
ABSCM (ABS
CONTROL MOD-
ULE), REPLACE,
ABS Control Mod-
ule and Hydraulic
Control Unit
(ABSCM&H/U).>
Go to step 5. Repair the har-
ness.
Go to step 6. Repair the har-
ness.
Repair the con- Replace the
nector. ABSCM only.
<Ref. to ABS-8,
ABSCM (ABS
CONTROL MOD-
ULE), REPLACE,
ABS Control Mod-
ule and Hydraulic
Control Unit
(ABSCM&H/U).>
No