Subaru IMPREZA 2002 Service Manual page 317

3
DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR
ABS
(
D I AG NOSTl C S)
Step
I CHECK GROUND CIRCUIT OF ABSCM&H/U
1)Turn the ignition switch to OFF.
2)Disconnect the connector from ABSCM&
H/U.
3)Measure the resistance between
ABSCM&H/U and chassis ground.
Connector 81 terminal
(F49) No. 23
-
Chassis ground:
2 CHECK POOR CONTACT IN CONNECTORS
3 CHECK SOURCES OF SIGNAL NOISE.
1 CHECK SOURCES OF SIGNAL NOISE.
5 CHECK ABSCM&WU.
01)Turn the ignition switch to OFF.
2)Connect all connectors.
3)Erase the memory.
4)Perform the inspection mode.
5)Read out the diagnostic trouble code.
6
CHECK ANY OTHER DIAGNOSTIC TROU-
BLE CODES APPEARANCE.
~
Check
Is the resistance less than 0.5
R?
Is there poor contact in con-
nectors between battery, igni-
tion switch and ABSCM&H/U?
Is the car telephone or the
wireless transmitter properly
installed?
Are noise sources (such as an
antenna) installed near the
sensor harness?
~
Is the same diagnostic trouble
code as in the current diagno-
sis still being output?
Are other diagnostic trouble
codes being output?
Yes
$0
to step 2.
3epair the con-
lector.
;o to step 4.
nstall the noise
;ources apart from
he sensor har-
less.
qeplace the
iBSCM&H/U.
:Ref. to ABS-7,
4BS Control Mod-
ile and Hydraulic
;ontrol Unit
ABSCM&H/U).>
Voceed with the
liagnosis corre-
iponding to the
liagnostic trouble
:ode.
No
Repair the
ABSCM&H/U
ground harness.
Go to step
3 .
Properly install the
car telephone or
the wireless trans-
mitter.
Go to step 5.
Go to step 6.
A temporary poor
contact.
ABS-1 31