Subaru IMPREZA 2002 Service Manual page 294

DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR
ABS (DIAGNOSTICS)
Step
9 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. 1 (+)
-
Chassis ground (-):
Rear LH No. 1 (+)
-
Chassis ground ( - ) :
IO CHECK BAlTERY 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. 1 (+)
-
Chassis ground (-):
Rear LH No.
1
(+)
-
Chassis ground ( - ) :
I1 CHECK HARNESSKONNECTOR BETWEEN
'nBSCM&HlU 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 2 7 / (F49) NO. 7
-
NO. 8:
12 CHECK BAlTERY SHORT OF HARNESS.
Measure the voltage between ABSCM&H/U
connector and chassis ground.
Connector & terminal
DTC 21 /(F49) No. 11 (+)
-
Chassis
ground (-):
DTC 23 / (F49) No. 9 (+)
-
Chassis
ground ( - ) :
DTC 25 / (F49) No. 14 (+)
-
Chassis
ground ( - ) :
DTC 27 / (F49) No. 7 (+)
-
Chassis
ground (-):
CHECK BAlTERY SHORT OF HARNESS.
1)Turn the ignition switch to ON.
2)Measure the voltage between ABSCM&H/U
connector and chassis ground.
1 3
Connector & terminal
DTC 21 /(F49) No. 11 (+)
-
Chassis
ground (-):
DTC 23 / (F49) No. 9 (+)
-
Chassis
ground (-):
DTC 25 / (F49) No. 14 (+)
-
Chassis
ground
( - ) I
DTC 2 7 / (F49) No. 7 (+)
-
Chassis
ground (-):
1 4 CHECK INSTALLATION OF ABS SENSOR.
Tightening torque:
32 N.m (3.3 kgf-m, 24 ft-lb)
Check
s the voltage less than 1 V?
s the voltage less than 1 V?
s the resistance between
1
ind 1.5 kR?
s the voltage less than 1 V?
s the voltage less than 1 V?
Ire the ABS sensor installation
iolts tightened securely?
Yes
i o to step 10.
; o
to step 11.
; o to step 12.
i o to step 13.
i o to step 14.
io to step 15.
No
Replace the ABS
sensor. Front:
<Ref. to ABS-14,
Front ABS Sen-
sor.> Rear: <Ref.
to ABS-I
8,
Rear
ABS Sensor.>
Replace the ABS
sensor. Front:
<Ref. to ABS-14,
Front ABS Sen-
sor.> Rear: <Ref.
to ABS-I 8, Rear
ABS Sensor.>
Repair harness/
sonnector
Detween
4BSCM&H/U and
4BS sensor.
Repair harness
3etween
4BSCM&H/U and
4BS sensor.
3epair harness
ietween
4BSCM&H/U and
4BS sensor.
righten the ABS
sensor installation
iolts securely.
ABS-I 08