Subaru 2009 IMPREZA Service Manual page 3005

WIPER AND WASHER SYSTEMS
2) Check rear wiper motor circuit
Step
1 CHECK POWER SUPPLY CIRCUIT OF THE
REAR WIPER MOTOR.
1) Disconnect the harness connector of the
rear wiper motor.
2) Turn the ignition switch to ACC.
3) Measure the voltage between the rear wiper
motor harness connector terminal and chassis
ground.
Connector & terminal
(D43) No. 3 (+) — Chassis ground (–):
2 CHECK GROUND CIRCUIT OF REAR WIPER
MOTOR.
1) Turn the ignition switch to OFF.
2) Measure the resistance between the rear
wiper motor harness connector terminal and
chassis ground.
Connector & terminal
(D43) No. 4 — Chassis ground:
3 CHECK HARNESS BETWEEN BODY INTE-
GRATED UNIT AND REAR WIPER MOTOR.
1) Turn the ignition switch to OFF.
2) Disconnect the harness connector of body
integrated unit.
3) Disconnect the harness connector of the
rear wiper motor.
4) Measure the resistance between the har-
ness connector terminals of the body integrated
unit and rear wiper motor.
Connector & terminal
(B279) No. 8 — (D43) No. 1:
(B279) No. 9 — (D43) No. 2:
4 CHECK INPUT VOLTAGE OF BODY INTE-
GRATED UNIT.
1) Turn the ignition switch to ACC.
2) Check the input voltage of body integrated
unit.
Connector & terminal
(B279) No. 21 (+) — Chassis ground (–):
5 CHECK OUTPUT OF BODY INTEGRATED
UNIT.
1) Connect the harness connector of body
integrated unit.
2) Disconnect the connector of the rear wiper
motor.
3) Turn the ignition switch to ACC.
4) Measure the voltage between rear wiper
motor connector and chassis ground.
Connector & terminal
(D43) No. 2 (+) — Chassis ground (–):
6 CHECK OPERATION OF REAR WIPER MO-
TOR.
1) Remove the rear wiper motor.
2) Check the rear wiper motor. <Ref. to WW-
19, INSPECTION, Rear Wiper Motor.>
Combination Switch (Wiper)
Is the voltage 10 V or more?
Is the resistance less than 10 ? Go to step 3.
Is the resistance less than 10 ? Go to step 4.
Is the voltage 10 V or more?
Is the voltage less than 1.5 V
when rear wiper switch is OFF,
and is the voltage 10 V or more
when rear wiper switch is ON?
Does the rear wiper motor
rotate normally?
WW-10
Check Yes
Go to step 2.
Go to step 5.
Go to step 6.
End.
No
• Check the fuse
(No. 23 in fuse &
relay box).
• Check the fus-
ible link (No. 7 in
main fuse box).
Repair the open
circuit of the rear
wiper motor
ground circuit.
Repair the open
circuit of the har-
ness between
body integrated
unit and rear wiper
motor.
Check the harness
and fuse.
Replace the body
integrated unit.
<Ref. to SL-50,
Body Integrated
Unit.>
Replace the rear
wiper motor.