Subaru IMPREZA GD 2007 Series Manual page 4105

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3. CHECK POWER SUPPLY AND GROUND CIRCUIT
Step
1 CHECK POWER SUPPLY.
1) Disconnect the harness connector of body
integrated unit.
2) Measure the voltage between harness con-
nector terminal and chassis ground.
Connector & terminal
(B280) No. 2 (+) — Chassis ground (–):
2 CHECK GROUND CIRCUIT.
Measure the resistance between harness con-
nector terminal and chassis ground.
Connector & terminal
(B280) No. 4 — Chassis ground:
(B280) No. 13 — Chassis ground:
4. CHECK DOOR LOCK SWITCH AND CIRCUIT
Step
1 CHECK DOOR LOCK SWITCH CIRCUIT.
1) Disconnect the harness connector of body
integrated unit.
2) Measure the resistance between the har-
ness connector terminal and chassis ground
when moving the door lock switch to LOCK.
Connector & terminal
(B281) No. 12 — Chassis ground:
2 CHECK DOOR LOCK SWITCH CIRCUIT.
Measure the resistance between the harness
connector terminal and chassis ground when
the door lock switch is moved to UNLOCK.
Connector & terminal
(B281) No. 11 — Chassis ground:
3 CHECK DOOR LOCK SWITCH.
1) Disconnect the door lock switch harness
connector.
2) Measure the resistance between the door
lock switch terminals when moving the door
lock switch to LOCK.
Connector & terminal
Driver's side:
(D7) No. 5 — No. 9:
Passenger's side:
(D62) No. 4 — No. 5:
4 CHECK DOOR LOCK SWITCH.
Measure the resistance between the door lock
switch terminals when moving the door lock
switch to UNLOCK.
Connector & terminal
Driver's side:
(D7) No. 5 — No. 8:
Passenger's side:
(D62) No. 2 — No. 5:
Door Lock Control System
Check
Is the voltage 10 V or more?
Is the resistance less than 10 Ω? The power supply
Check
Is the resistance less than 10 Ω? Go to step 2.
Is the resistance less than 10 Ω? The door lock
Is the resistance less than 10 Ω? Go to step 4.
Is the resistance less than 1 Ω? Check the harness
SL-9
SECURITY AND LOCKS
Yes No
Go to step 2. Check the harness
for open or short
circuit between
body integrated
unit and fuse.
Repair the har-
and ground circuit ness.
are OK.
Yes No
Go to step 3.
Go to step 3.
switch is OK.
Replace the door
lock switch.
Replace the door
for open circuits or lock switch.
shorts between the
body integrated
unit and the door
lock switch.