Subaru Impreza 2003 Service Manual page 2450

DIAGNOSTICS PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
ABS (DIAGNOSTICS)
Step
12 CHECK BATTERY SHORT OF HARNESS.
Measure the voltage between ABSCM&H/U
connector and chassis ground.
Connector & terminal
DTC 21
LHD: (B301) No. 11 (+) — Chassis
ground ( − − − − ):
RHD: (F49) No. 11 (+) — Chassis ground
( − − − − ):
DTC 23
LHD: (B301) No. 9 (+) — Chassis ground
( − − − − ):
RHD: (F49) No. 9 (+) — Chassis ground
( − − − − ):
DTC 25
LHD: (B301) No. 14 (+) — Chassis
ground ( − − − − ):
RHD: (F49) No. 14 (+) — Chassis ground
( − − − − ):
DTC 27
LHD: (B301) No. 7 (+) — Chassis ground
( − − − − ):
RHD: (F49) No. 7 (+) — Chassis ground
( − − − − ):
13 CHECK BATTERY SHORT OF HARNESS.
1)Turn the ignition switch to ON.
2)Measure the voltage between ABSCM&H/U
connector and chassis ground.
Connector & terminal
DTC 21
LHD: (B301) No. 11 (+) — Chassis
ground ( − − − − ):
RHD: (F49) No. 11 (+) — Chassis ground
( − − − − ):
DTC 23
LHD: (B301) No. 9 (+) — Chassis ground
( − − − − ):
RHD: (F49) No. 9 (+) — Chassis ground
( − − − − ):
DTC 25
LHD: (B301) No. 14 (+) — Chassis
ground ( − − − − ):
RHD: (F49) No. 14 (+) — Chassis ground
( − − − − ):
DTC 27
LHD: (B301) No. 7 (+) — Chassis ground
( − − − − ):
RHD: (F49) No. 7 (+) — Chassis ground
( − − − − ):
14 CHECK INSTALLATION OF ABS WHEEL
SPEED SENSOR.
Check
Is the voltage less than 1 V?
Is the voltage less than 1 V?
Are the ABS wheel speed sen-
sor installation bolts tightened
33 N·m (3.3 kgf-m, 24 ft-lb)?
ABS-110
Yes
Go to step 13. Repair the har-
ness between
ABSCM&H/U and
ABS wheel speed
sensor.
Go to step 14. Repair the har-
ness between
ABSCM&H/U and
ABS wheel speed
sensor.
Go to step 15. Tighten the ABS
wheel speed sen-
sor installation
bolts securely.
No