Subaru IMPREZA 2002 Service Manual page 347

DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR
ABS (DIAGNOSTICS)
Step
CHECK INPUT VOLTAGE OF ABSCM&H/U.
1)Turn the ignition switch to OFF.
2)Disconnect the connector from ABSCM&
H/U .
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 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 (-):
.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.
Connector & terminal
(F49)
No.
23
-
Chassis ground:
CHECK MOTOR OPERATION.
Operate the sequence control. <Ref. to ABS-
11, ABS Sequence Control.>
NOTE:
Use the diagnosis connector to operate the se.
quence control.
CHECK POOR CONTACT IN CONNECTORS,
Turn the ignition switch to OFF.
CHECK ABSCM&H/U.
1)Connect all connectors.
2)Erase the memory.
3)Perform the inspection mode.
4)Read out the diagnostic trouble code.
CHECK ANY OTHER DIAGNOSTIC TROU-
BLE CODES APPEARANCE.
Check
Is the voltage between 10 and
13
V?
Is the resistance less than 0.5
R?
Is the voltage between 10 and
15 V?
I s
the resistance less than 0.5
R?
Can the motor revolution noise
(buzz) be heard when carrying
out the sequence control?
Is there poor contact in con-
nector between generator, bat-
tery and ABSCM&H/U?
Is the same diagnostic trouble
code as in the current diagno-
sis still being output?
Are other diagnostic trouble
codes being output?
~~
Yes
to step
2.
to step 3.
to step 4.
to step 5.
to step 6.
Dair the con-
:tor.
Aace the
SCM&H/U.
ef. to ABS-7,
S Control Mod-
and Hydraulic
itrol Unit
ECM&H/U).>
ceed with the
gnosis corre-
mding to the
gnostic trouble
le.
~~
N O
Repair harness/
connector
between battery
and ABSCM&H/U
and check fuse
SBFG.
Repair the
ABSCM&H/U
ground harness.
Repair harness
connector
between battery,
ignition switch and
ABSCM&H/U.
Repair the
ABSCM&H/U
ground harness.
Replace the
ABSCM&H/U.
<Ref. to ABS-7,
ABS Control Mod-
ule and Hydraulic
Control Unit
(ABSCM&H/U).
>
Go to step 7.
Go to step 8.
A temporary poor
contact.
ABS-I 61