Subaru Impreza 2003 Service Manual page 3110

SECURITY AND LOCKS
5. CHECK DOOR LOCK ACTUATOR AND CIRCUIT
Step
1 CHECK OUTPUT SIGNAL.
Measure the voltage between the harness con-
nector terminal of keyless entry control module
or double lock module and chassis ground
when moving the door lock switch to LOCK.
Connector & terminal
Without double lock:
(B176) No. 18 (+) — Chassis ground (–):
With double lock:
(B324) No. 3 (+) — Chassis ground (–):
2 CHECK OUTPUT SIGNAL.
Measure the voltage between the harness con-
nector terminal of keyless entry control module
or double lock module and chassis ground
when moving the door lock switch to UNLOCK.
Connector & terminal
Without double lock:
(B176) No. 17 (+) — Chassis ground (–):
With double lock:
(B324) No. 5 (+) — Chassis ground (–):
3 CHECK DOOR LOCK ACTUATOR.
Check the door lock actuator.
Front door lock actuator: <Ref. to SL-25, Front
Door Lock Actuator.>
Rear door lock actuator: <Ref. to SL-29, Rear
Door Lock Actuator.>
Rear gate latch lock actuator: <Ref. to SL-32,
Rear Gate Latch Lock Actuator.>
6. CHECK KEY CYLINDER LOCK SWITCH AND CIRCUIT
Step
1 CHECK KEY CYLINDER LOCK SWITCH CIR-
CUIT.
1)Disconnect the double lock module harness
connector.
2)Measure the resistance between harness
connector terminal and chassis ground when
turning the key cylinder lock switch to lock
position.
Connector & terminal
(B325) No. 2 — Chassis ground:
2 CHECK KEY CYLINDER LOCK SWITCH CIR-
CUIT.
Measure the resistance between harness con-
nector terminal and chassis ground when turn-
ing the key cylinder lock switch to unlock
position.
Connector & terminal
(B325) No. 3 — Chassis ground:
DOOR LOCK CONTROL SYSTEM
Is the voltage more than 10 V? Go to step 2.
Is the voltage more than 10 V? Go to step 3.
Is the door lock actuator OK?
Is the resistance less than 10
Ω?
Is the resistance less than 10
Ω?
SL-12
Check
Check the harness
for open circuits or
shorts between
the keyless entry
control module or
double lock mod-
ule and the door
lock actuator.
Check
Go to step 2.
Key cylinder lock
switch is OK.
Yes No
Replace the key-
less entry control
module or double
lock module.
Replace the key-
less entry control
module or double
lock module.
Replace the door
lock actuator.
Yes No
Go to step 3.
Go to step 3.