Subaru Legacy 2003 Service Manual page 2873

DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR
ABS (DIAGNOSTICS)
8 CHECK HARNESS/CONNECTOR BETWEEN
ABSCM&H/U AND DATA LINK CONNEC-
TOR.
Measure resistance between ABSCM&H/U
connector and data link connector.
Connector & terminal
(F49) No. 20 — (B40) No. 5:
(F49) No. 5 — (B40) No. 4:
Is the measured value less than the specified
value?
9 CHECK INSTALLATION OF ABSCM&H/U
CONNECTOR.
Turn ignition switch to OFF.
Is ABSCM&H/U connector inserted into
ABSCM&H/U until the clamp locks onto it?
10 CHECK POWER SUPPLY CIRCUIT.
1) Turn ignition switch to ON (engine OFF).
2) Measure ignition power supply voltage
between ABSCM&H/U connector and
chassis ground.
Connector & terminal
(F49) No. 1 (+) — Chassis ground ( − − − − ):
Does the measured value exceed the spec-
ified value?
11 CHECK HARNESS CONNECTOR BETWEEN
ABSCM&H/U AND CHASSIS GROUND.
1) Turn ignition switch to OFF.
2) Disconnect connector from ABSCM&H/U
and transmission.
3) Measure resistance of harness between
ABSCM&H/U and chassis ground.
Connector & terminal
(F49) No. 23 — Chassis ground:
Is the measured value less than the speci-
fied value?
12 CHECK POOR CONTACT IN CONNECTORS.
Is there poor contact in control module power
supply, ground line and data link connector?
Step Value
0.5 Ω
ABSCM&HU connector
inserted securely.
10 V
1 Ω
There is no poor contact.
ABS-82
Yes
Repair harness Go to step 9.
and connector
between
ABSCM&H/U and
data link connec-
tor.
Go to step 10. Insert ABSCM&H/
U connector into
ABSCM&H/U.
Go to step 11. Repair open circuit
in harness
between
ABSCM&H/U and
battery.
Go to step 12. Repair open circuit
in harness
between
ABSCM&H/U and
inhibitor side con-
nector, and poor
contact in cou-
pling connector.
Replace Repair connector.
ABSCM&H/U.
<Ref. to ABS-6,
ABS Control Mod-
ule and Hydraulic
Control Unit
(ABSCM&H/U).>
No