Subaru IMPREZA 2002 Service Manual page 321

DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR
ABS (DIAGNOSTICS)
Yes
30
to step 2.
30 to step 3 .
30 to step 4.
3eplace the fuse.
So to step 6.
So to step 7.
Go to step 8.
Go to step 9.
Go to step
10.
Step
CHECK GENERATOR.
1)Start the engine.
2)ldling after warm-up.
3)Measure the voltage between generator B
terminal and chassis ground.
Terminal
Generator 6 terminal
-
Chassis ground:
CHECK BATTERY TERMINAL.
Turn the ignition switch to OFF.
No
Repair the genera
tor. <Ref. to SC-
13, Generator.>
Tighten the clamp
of terminal.
Repair open circuit
in harness
between battery
and Relay holder
connector.
Go to step 5.
Repair open circuil
in harness
between battery
and Relay holder
connector.
Repair harness
connector
between battery,
ignition switch and
ABS relay.
Repair open circui'
between ABS
relay and chassis
ground.
Replace the ABS
relay.
Repair harness
connector
between battery,
ignition switch anc
ABSCM&H/U.
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
(6225) No. 5 (+)
-
Chassis ground ( - ) :
I
CHECK RELAY HOLDER.
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.
I
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
i
(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.
I
Connector & terminal
(6264) No. 3 (+)
-
Chassis ground:
I 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)Disconnect the connector from ABSCM&
HIU.
2)Run the engine at idle.
3)Measure the voltage between ABSCM&H/U
connector and chassis ground.
3
Connector & terminal
(F49) No. 1 (+)
-
Chassis ground (-):
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.
lo
~
Connector & terminal
1F49) No. 23
-
Chassis around:
Go to step 11.
Check
s the voltage between 10 and
7 V?
Repair the
ABSCM&H/U
ground harness.
ire the positive and negative
Iattery terminals tightly
:lamped?
s
the voltage more than 10 V?
s
the fuse blown out?
s the voltage more than 10 V?
s the voltage more than 10 V?
s the resistance less than 5
R?
s
the resistance less than 10
R?
Is the voltage between 10 and
17 V?
Is the resistance less than
0.5
R?
ABS-1 35