Subaru IMPREZA 2002 Service Manual page 245

9
DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR
ABS (DIAGNOSTICS)
Check
s the voltage more than 10 V?
Step
I
CHECK INPUT VOLTAGE OF RELAY HOLD-
ER.
1)Turn the ignition switch to OFF.
2)Remove the fuse.
3)Measure the voltage between ABS relay
connector and chassis ground.
Connector & terminal
(8225) No. 5 (+)
-
Chassis ground (-):
2 CHECK RELAY HOLDER.
3 CHECK INPUT VOLTAGE OF ABS RELAY.
1)lnstall the fuse.
2)Remove the ABS relay.
3)Turn the ignition switch to ON.
4)Measure the voltage between ABS relay
connector and chassis ground.
Connector & terminal
(8264) No. 2 (+)
-
Chassis ground ( - ) :
CHECK INPUT VOLTAGE OF ABS RELAY.
Measure the voltage between ABS relay con-
nector and chassis ground.
Connector & terminal
4
(8264)
No.
1 (+)
-
Chassis ground (-):
CHECK GROUND CIRCUIT OF ABS RELAY.
1)Turn the ignition switch to OFF.
2)Measure the resistance between ABS relay
connector and chassis ground.
5
Connector & terminal
(8264)
No.
3 (+)
-
Chassis ground:
1)Connect the battery to ABS relay terminal
No. 1 and 3.
2)Measure the resistance between ABS relay
terminals.
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.
6 CHECK the ABS RELAY.
7
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.
0
Connector & terminal
(F49)
No.
23
-
Chassis ground:
9
CHECK POOR CONTACT IN CONNECTORS.
Yes
Go to step 2.
10 CHECK ABSCM&H/U.
1 )Connect all connectors.
2)Erase the memory.
3)Perform the inspection mode.
4)Read out the diagnostic trouble code.
Is the voltage more than 10 V? Go to step 4.
Is
the fuse blown out?
I
Replace the fuse.
Is the resistance less than 5 Go to step 6.
IS the voltage more than 10 V? Go to step 5.
k
Is the resistance less than 10
n?
Go to step 7.
n?
Is there poor contact in con-
nectors between generator,
battery and ABSCM&H/U?
Is the same diagnositc trouble
code as in the current diagno-
sis still being output?
Repair the con-
nector.
Replace the
ABSCM&H/U.
<Ref. to ABS-7,
ABS Control Mod-
ule and Hydraulic
Control Unit
(ABSCM&H/U).>
15 V?
Is
7 - j -
the resistance less than 0.5 Go to step 9.
ABS-59
~
No
Repair open circuit
in harness
between battery
m d Relay holder
Zonnector.
Go to step
3 .
Repair open circuit
in harness
between battery
and Relay holder
connector.
Repair harness
connector
between battery,
ignition switch and
ABS relay.
Repair open circuit
between ABS
relay and chassis
ground.
Replace the ABS
relay.
Repair harness
connector
between ABS
relay and
ABSCM&H/U.
Repair the
ABSCM&H/U
ground harness.
Go to step 10.
Go to step 11.