Subaru IMPREZA 2002 Service Manual page 284

DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR
ABS (DIAGNOSTICS)
Step
3 CHECK HARNESS CONNECTOR BETWEEN
EACH CONTROL MODULE AND DATA LINK
CONNECTOR.
1)Turn the ignition switch to OFF.
2)Disconnect the TCM, ECM, ABSCM&H/U,
and, cruise control module connectors.
3)Measure the resistance between
ABSCM&H/U connector and chassis ground.
Connector & terminal
(840) No. 5
-
Chassis ground:
(B40) No. 4
-
Chassis ground:
IO CHECK OUTPUT SIGNAL FOR ABSCM&H/
U.
1)Turn the ignition switch to ON.
2)Measure the voltage between ABSCM&H/U
and chassis ground.
Connector & terminal
(840) No. 5 (+)
-
Chassis ground ( - ) :
(840) No. 4 (+)
-
Chassis ground ( - ) :
I1 CHECK HARNESWCONNECTOR BETWEEN
ABSCM&H/U AND DATA LINK CONNEC-
TOR.
Measure the resistance between ABSCM&H/U
connector and data link connector.
Connector & terminal
(F49) NO. 20
-
(840) NO. 5:
(F49) NO. 5
-
(840) NO. 4:
1 2 CHECK INSTALLATION OF ABSCM&HN
CONNECTOR.
Turn the ignition switch to OFF.
ER.
1)Turn the ignition switch to OFF.
2)Remove the fuse.
3)Measure the voltage between ABS relay
connector and chassis ground.
1 3
CHECK INPUT VOLTAGE OF RELAY HOLD-
Connector & terminal
(8225) No. 5 (+)
-
Chassis ground ( - ) :
1 4 CHECK RELAY HOLDER.
1 5 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
1 6
(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.
1 7
Connector & terminal
(8264) No. 3 (+)
-
Chassis ground:
Check
s the resistance less than 1
2?
s the voltage more than 1 V?
s the resistance less than 0.5
2?
s the ABSCM&H/U connector
iserted into ABSCM&H/U until
he clamp locks onto it?
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 5 R?
Yes
30 to step 10.
3epair harness
and connector
letween each con
rol module and
jata link connec-
or.
3epair harness
ind connector
letween
iBSCM&H/U and
jata link connec-
or.
20 to step 13.
20
to step 14.
3eplace the fuse.
20 to step 16.
20 to step 17.
20
to step 18.
No
3epair harness
and connector
letween each con,
:rol module and
lata link connec-
:or.
20
to step 11.
30
to step 12.
nsert ABSCM&H/
J connector into
4BSCM&H/U.
3epair open circuit
n harness
letween battery
and Relay holder
:onnector.
20 to step 15.
3epair open circuit
n harness
letween battery
md Relay holder
:onnector.
3epair harness
:onnector
letween battery,
gnition switch and
4BS relay.
3epair open circuit
letween ABS
'elay and chassis
ground.
ABS-98