Subaru IMPREZA 2002 Service Manual page 285

DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR
ABS (DIAGNOSTICS)
Step Check
8 CHECK ABS RELAY. Is the resistance less than 10
1)Connect the battery to ABS relay terminal
No. 1 and
3.
2)Measure the resistance between ABS relay
terminals.
1)Turn the ignition switch to ON (engine OFF).
2)Measure the ignition power supply voltage
Q?
9 CHECK POWER SUPPLY CIRCUIT.
Is the voltage more than 10 V?
Yes
Go to step 19.
Go to step 20.
No
Replace the ABS
relay.
!O
CHECK HARNESS CONNECTOR BETWEEN Is the resistance less than 1
ABSCM&H/U AND CHASSIS GROUND.
Q?
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
(F49) No. 23
-
Chassis ground:
!1
CHECK POOR CONTACT IN CONNECTORS. Is there poor contact in control
module power supply, ground
line and data link connector?
Repair open circuit
in harness
between
ABSCM&H/U and
battery.
Go to step 21.
Repair the con-
nector.
Repair open circuit
in harness
between
ABSCM&H/U and
inhibitor side con-
nector, and poor
contact in cou-
pling connector.
Replace the
ABSCM&H/U.
<Ref. to ABS-7,
ABS Control Mod-
ule and Hydraulic
Control Unit
(ABSCM&H/U).>
ABS-99