Subaru IMPREZA 2002 Service Manual page 229

Is
DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR
ABS (DIAGNOSTICS)
Step
CHECK ABS SENSOR.
1)Turn the ignition switch to OFF.
2)Disconnect the connector from ABS sensor.
3)Measure the resistance of ABS sensor con-
nector terminals.
Terminal
Front RH No. 1
-
No. 2:
Front LH No. 1
-
No. 2:
Rear RH No. 1 -No.
2:
Rear LH No.
1
-
No. 2:
CHECK BATTERY SHORT OF ABS SEN-
SOR.
1)Disconnect the connector from ABSCM&
H/U.
2)Measure the voltage between ABS sensor
and chassis ground.
Terminal
Front RH No. 1 (+)
-
Chassis ground (-):
Front LH No. 1 (+)
-
Chassis ground (-):
Rear RH No. 2 (+)
-
Chassis ground (-):
Rear LH No. 2 (+)
-
Chassis ground ( - ) :
I
CHECK BATTERY SHORT OF ABS SEN-
SOR.
1)Turn the ignition switch to ON.
2)Measure the voltage between ABS sensor
and chassis ground.
Terminal
Front RH No. 1 (+)
-
Chassis ground (-):
Front LH No. 1 (+)
-
Chassis ground (-):
Rear RH No. 2 (+)
-
Chassis ground (-):
Rear LH No, 2 (+)
-
Chassis ground ( - ) :
I
CHECK HARNESS/CONNECTOR BETWEEN
ABSCM&H/U AND ABS SENSOR.
1)Turn the ignition switch to OFF.
2)Connect the connector to ABS sensor.
3)Measure the resistance between
ABSCM&H/U connector terminals.
Connector & terminal
DTC 21 / (F49) NO. 11
-
NO. 12:
DTC 23 / (F49) NO. 9
-
NO. 10:
DTC 25 / (F49) NO. 14
-
NO. 15:
DTC 27 / (F49) NO. 7
-
NO.
8:
b
CHECK BAlTERY SHORT OF HARNESS.
Measure the voltage between ABSCM&H/U
connector and chassis ground.
Connector
i ?
terminal
DTC 21 / (F49)
No.
11 (+)
-
Chassis
ground (-):
DTC 23 / (F49) No. 9 (+)
-
Chassis
ground ( - ) :
DTC 25 / (F49) No. 14 (+)
-
Chassis
ground ( - ) :
DTC 2 7 / (F49) No. 7 (+)
-
Chassis
ground
6):
Check
s
the resistance between 1
ind 1.5 kR?
s the voltage less than 1 V?
s the voltage less than 1 V?
Is the resistance between 1
and 1.5 kR?
Is the voltage less than 1 V?
Yes
20 to step 2.
20 to step 3.
30 to step 4.
20 to step 5.
30 to step 6.
No
3eplace the ABS
sensor. Front:
:Ref. to ABS-I 4,
7ont ABS Sen-
;or.> Rear: <Ref.
:o
ABS-1 8, Rear
4BS Sensor.>
3eplace the ABS
sensor. Front:
:Ref. to ABS-14,
3ont ABS Sen-
:or.> Rear: <Ref.
:o
ABS-1 8, Rear
4BS Sensor.>
Replace the ABS
sensor. Front:
<Ref. to ABS-14,
Front ABS Sen-
:or.> Rear: <Ref.
to ABS-I 8, Rear
ABS Sensor.>
Repair harness/
connector
between
ABSCM&H/U and
ABS sensor.
Repair harness
between
ABSCM&H/U and
ABS sensor.
ABS-43