Subaru IMPREZA 2002 Service Manual page 319

DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR
ABS (DIAGNOSTICS)
Step
I CHECK GENERATOR.
1)Start the engine.
2)ldling after warm-up.
3)Measure the voltage between generator B
terminal and chassis ground.
Terminal
Generator B terminal
-
Chassis ground
! CHECK BATTERY TERMINAL.
Turn the ignition switch to OFF.
I CHECK INPUT VOLTAGE OF ABSCM&H/U.
1)Disconnect the connector from ABSCM&
H/U.
2)Run the engine at idle.
3)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.
I
Connector & i terminal
(F49) No. 23
-
Chassis ground:
b
CHECK POOR CONTACT IN CONNECTORS
i 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
s the voltage between
10
and
I5 V?
\re the positive and negative
iattery terminals tightly
Aamped?
s
the voltage between 10 and
I5 V?
s the resistance less than 0.5
n?
s there poor contact in con-
lectors between generator,
iattery and ABSCM&H/U?
s the same diagnostic trouble
:ode as in the current diagno-
;is still being output?
\re other diagnostic trouble
:odes being output?
Yes
;o to step 2.
30 to step 3 .
; o to step 4.
i o
to step 5.
3epair the con-
lector.
3eplace the
4BSCM&H/U.
:Ref. to ABS-7,
4BS Control Mod-
ile and Hydraulic
;ontrol Unit
ABSCM&H/U).>
'roceed with the
jiagnosis corre-
iponding to the
iiagnostic trouble
:ode.
No
Repair the genera
tor. <Ref. to SC-
13, Generator.>
Tighten the clamp
of terminal.
Repair harness
connector
between battery,
ignition switch anc
ABSCM&H/U.
Repair the
ABSCM&H/U
ground harness.
Go to step 6.
Go to step 7.
A temporary poor
contact.
ABS-I 33