Subaru IMPREZA 2002 Service Manual page 221

1
DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR
ABS (DIAGNOSTICS)
Step
I
CHECK INSTALLATION OF ABSCM&H/U
CONNECTOR.
Turn the ignition switch to OFF.
! CHECK DIAGNOSIS TERMINAL.
Measure the resistance between diagnosis ter-
minals (B81) and chassis ground.
Terminals
Diagnosis terminal (A)
-
Chassis
ground:
Diagnosis terminal (B)
-
Chassis
ground:
3 CHECK DIAGNOSIS LINE.
1)Turn the ignition switch to OFF.
2)Connect the diagnosis terminal (881) to
diagnosis connector (B82) No. 6.
3)Disconnect the connector from ABSCM&
H/U.
4)Measure the resistance between
ABSCM&H/U connector and chassis ground.
Connector & terminal
(F49)
No.
4
-
Chassis ground:
1 CHECK GENERATOR.
1)Start the engine.
2)ldle the engine.
3)Measure the voltage between generator and
chassis ground.
Terminal
Generator B terminal (+)
-
Chassis
ground (-):
5 CHECK BAlTERY TERMINAL.
6
Turn the ignition switch to OFF.
CHECK POWER SUPPLY OF ABSCM.
1)Disconnect the connector from ABSCM&
H/U.
2)Start the engine.
3)ldle the engine.
4)Measure the voltage between ABSCM&H/U
connector and chassis ground.
Connector & terminal
(F49) No. 1 (+)
-
Chassis ground (-):
7 CHECK WIRING HARNESS.
1)Disconnect the connector (F74) from con-
nector (8200).
2)Turn the ignition switch to ON.
8 CHECK PROJECTION AT ABSCM&H/U.
1)Turn the ignition switch to OFF.
2)Check for broken projection at the
ABSCM&H/U terminal.
Check
;the ABSCM&H/U connector
iserted into ABSCM until the
lamp locks onto it?
;the resistance less than 0.5
I?
s the resistance less than 0.5
2?
s the voltage between 10 and
5 V?
s there poor contact at battery
erminal?
s the voltage between 10 and
I5 V?
loes the ABS warning light
,emain off?
9re the projection broken?
Yes
io to step 2.
io to step 3 .
YO
to step 4.
50 to step 5.
3epair the battery
erminal.
; o to step 7.
i o
to step 8.
i o
to step 9.
No
nsert ABSCM&H/
J connector into
4BSCM&H/U until
he clamp locks
into it.
3epalr the diagno-
;is terminal har-
less.
qepair harness
:onnector
Detween
\BSCM&H/U and
jiagnosis connec-
tor.
Repair the genera
tor. <Ref. to SC-
13. Generator.>
Go to step 6.
Repair the
ABSCM&H/U
power supply cir-
cuit.
Repair the front
wiring harness.
Replace the
ABSCM&H/U.
<Ref. to ABS-7,
ABS Control Mod.
ule and Hydraulic
Control Unit
(ABSCM&H/U).>
ABS-35