Subaru Impreza 2003 Service Manual page 2439

DIAGNOSTICS PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
Step
10 CHECK POWER SUPPLY CIRCUIT.
1)Turn the ignition switch to ON (engine OFF).
2)Measure the ignition power supply voltage
between ABSCM&H/U connector and chassis
ground.
Connector & terminal
LHD: (B301) No. 1 (+) — Chassis ground
( − − − − ):
RHD: (F49) No. 1 (+) — Chassis ground
( − − − − ):
11 CHECK HARNESS CONNECTOR BETWEEN
ABSCM&H/U AND CHASSIS GROUND.
1)Turn the ignition switch to OFF.
2)Disconnect the connector from ABSCM&H/U
and transmission.
3)Measure the resistance of harness between
ABSCM&H/U and chassis ground.
Connector & terminal
LHD: (B301) No. 23 — Chassis ground:
RHD: (F49) No. 23 — Chassis ground:
12 CHECK POOR CONTACT IN CONNECTORS. Is there poor contact in control
Check
Is the voltage 10 — 15 V?
Is the resistance less than 0.5
Ω?
module power supply, ground
line and data link connector?
ABS-99
ABS (DIAGNOSTICS)
Yes
Go to step 11. Repair the open
circuit in harness
between
ABSCM&H/U and
battery.
Go to step 12. Repair the open
circuit in harness
between
ABSCM&H/U and
inhibitor side con-
nector, and poor
contact in cou-
pling connector.
Repair the con- Replace the
nector. ABSCM&H/U.
<Ref. to ABS-7,
ABS Control Mod-
ule and Hydraulic
Control Unit
(ABSCM&H/U).>
No