Subaru IMPREZA 2002 Service Manual page 327

DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR
ABS (DIAGNOSTICS)
Step
t
CHECK BATTERY SHORT OF HARNESS.
1)Turn the ignition switch to OFF.
2)Disconnect two connectors from TCM.
3)Disconnect the connector from ABSCM&
HIU.
4)Measure the voltage between ABSCM&H/U
connector and chassis ground.
Connector & terminal
(F49) No. 3 (+)
-
Chassis ground (-):
2
CHECK BAlTERY SHORT OF HARNESS.
1)Turn the ignition switch to ON.
2)Measure the voltage between ABSCM&H/U
connector and chassis ground.
Connector & terminal
(F49) No. 3 (+)
-
Chassis ground (-):
3 CHECK OPEN CIRCUIT OF HARNESS.
1)Turn the ignition switch to OFF.
2)Connect all connectors to TCM.
3)Turn the ignition switch to ON.
4)Measure the voltage between ABSCM&H/U
connector and chassis ground.
Connector & terminal
(F49) No. 3 (+)
-
Chassis ground (-):
(F49) No. 31 (+)
-
Chassis ground (-):
CHECK POOR CONTACT IN CONNECTORS.
Turn the ignition switch to OFF.
Q
5 CHECK ABSCM&H/U.
1)Connect all connectors.
2)Erase the memory.
3)Perform the inspection mode.
4)Read out the diagnostic trouble code.
6 CHECK ANY OTHER DIAGNOSTIC TROU-
BLE CODES APPEARANCE.
Check
I s
the voltage less than 1 V?
I s
the voltage less than 1 V?
Is the voltage between 10 and
13 V?
Is there poor contact in con-
nectors between TCM 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
Go to step 2.
Go to step 3 .
Go to step 4.
Repair the con-
qector.
Replace the
ABSCM&H/U.
<Ref. to ABS-7,
ABS Control Mod-
ule and Hydraulic
Control Unit
(ABSCM&H/U).>
Proceed with the
diagnosis corre-
sponding to the
diagnositc trouble
code.
No
Repair harness
between TCM and
ABSCM&H/U.
Repair harness
between TCM and
ABSCM&H/U.
Re pair harness/
connector
between TCM and
ABSCM&H/U.
Go to step 5.
Go to step 6.
A temporary poor
contact.
ABS-1 41