Subaru IMPREZA 2002 Service Manual page 269

I I
DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR
ABS (DIAGNOSTICS)
;
the voltage more than 10 V?
Step
CHECK INPUT VOLTAGE OF ABSCM&H/U.
1)Turn the ignition switch to OFF.
2)Disconnect the connector from ABSCM&
HIU.
3)Turn the ignition switch to ON.
4)Measure the voltage between ABSCM&H/U
connector and chassis ground.
Connector & terminal
(F49) No. 25 (+)
-
Chassis ground ( - ) :
CHECK GROUND CIRCUIT OF MOTOR.
1)Turn the ignition switch to OFF.
2)Measure the resistance between
ABSCM&H/U connector and chassis ground.
Connector & terminal
(F49) No. 26
-
Chassis ground:
CHECK INPUT VOLTAGE OF RELAY HOLD,
ER.
1)Turn the ignition switch to OFF.
2)Remove the fuse.
3)Measure the voltage between ABS relay
connector and chassis ground.
Connector & terminal
(8225) No. 5 (+)
-
Chassis ground ( - ) :
CHECKRELAYHOLDER.
CHECK INPUT VOLTAGE OF ABS RELAY.
1)lnstall the fuse.
2)Remove the ABS relay.
3)Turn the ignition switch to ON.
4)Measure the voltage between ABS relay
connector and chassis ground.
Connector & terminal
(8264) No. 2 (+)
-
Chassis ground (-):
CHECK INPUT VOLTAGE OF ABS RELAY.
Measure the voltage between ABS relay con-
nector and chassis ground.
Connector & terminal
(8264) No. 1 (+)
-
Chassis ground ( - ) :
CHECK GROUND CIRCUIT OF ABS RELAY
1)Turn the ignition switch to OFF.
2)Measure the resistance between ABS relay
connector and chassis ground.
Connector & terminal
(8264) No. 3 (+)
-
Chassis ground:
CHECK ABS RELAY.
1)Connect the battery to ABS relay terminal
No. 1 and 3.
2)Measure the resistance between ABS relay
terminals.
CHECK INPUT VOLTAGE OF ABSCM&H/U.
1)Run the engine at idle.
2)Measure the voltage between ABSCM&H/U
connector and chassis ground.
Connector & terminal
(F49) No. 1 (+)
-
Chassis ground (-):
Yes
;o to step 2.
Check
the voltage between 10 and
5 V?
30
to step
3 .
Repair the
ABSCM&H/U
ground harness.
;the resistance less than 0.5
!?
30 to step 4.
;
the voltage more than 10 V?
Replace the fuse.
Go to step
6.
Go to step
5 .
Repair open circui
in harness
between battery
and Relay holder
connector.
s the fuse blown out?
j
the voltage more than 10 V?
30 to step 7 .
So to step 8.
Go to step 9.
Repair harness
connector
between battery,
ignition switch and
ABS relay.
Repair open circuP
between ABS
relay and chassis
ground.
Replace the ABS
relay.
j
the resistance less than 5
2?
s the resistance less than 10
2?
s the voltage between 10 and
I5 V?
No
Repair harness/
connector
between battery
and ABSCM&H/U
and check fuse
SBF-holder.
in harness
between battery
and Relay holder
connector.
Go to step 10.
connector
between battery,
ignition switch an(
ABSCM&H/U.
ABS-83