Subaru Forester 2004 Service Manual page 146

Diagnostics Procedure with Diagnostic Trouble Code (DTC)
Step
1 CHECK INPUT VOLTAGE OF ABSCM&H/U.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from ABSCM&
H/U.
3) Run the engine at idle.
4) Measure the voltage between ABSCM&H/
U connector and chassis ground.
Connector & terminal
LHD:
(B301) No. 1 (+) — Chassis ground (
(B301) No. 24 (+) — Chassis ground (
RHD:
(F49) No. 1 (+) — Chassis ground (
(F49) No. 24 (+) — Chassis ground (
2 CHECK GROUND CIRCUIT OF ABSCM&H/U.
1) Turn the ignition switch to OFF.
2) Measure the resistance between
ABSCM&H/U connector and chassis ground.
Connector & terminal
LHD: (B301) No. 23 — Chassis ground:
RHD: (F49) No. 23 — Chassis ground:
3 CHECK POOR CONTACT IN CONNECTORS. Is there poor contact in con-
4 CHECK ABSCM&H/U.
1) Connect all connectors.
2) Erase the memory.
3) Perform the inspection mode.
4) Read out the DTC.
5 CHECK ANY OTHER DIAGNOSTIC TROU-
BLE CODES (DTCs) APPEARANCE.
Check
Is the voltage 10 — 15 V?
−
):
−
):
−
):
−
):
Is the resistance less than
0.5 Ω?
nectors between generator,
battery and ABSCM&H/U?
Is the same DTC as in current
diagnosis still being output?
Are other DTCs being output? Proceed with the
ABS-145
ABS (DIAGNOSTIC)
Yes
Go to step 2. Repair the har-
ness connector
between battery
and ABSCM&H/U.
Go to step 3. Repair the
ABSCM&H/U
ground harness.
Repair the con- Go to step 4.
nector.
Replace the Go to step 5.
ABSCM only.
<Ref. to ABS-8,
ABSCM (ABS
CONTROL MOD-
ULE), REPLACE,
ABS Control Mod-
ule and Hydraulic
Control Unit
(ABSCM&H/U).>
A temporary poor
diagnosis corre- contact.
sponding to DTC.
No