Subaru 2003 LEGACY Service Manual page 12

SECURITY AND LOCKS
4 CHECK DOOR LOCK SWITCH.
Measure the resistance between the door lock
switch terminals when moving the door lock
knob to LOCK.
Terminal
No. 1 — No. 3:
Does the measured value exceed the specified
value?
5. CHECK DOOR LOCK ACTUATOR AND CIRCUIT
1 CHECK OUTPUT SIGNAL.
Measure the voltage between the harness con-
nector terminal of keyless entry control module
and chassis ground when moving the door lock
knob to LOCK.
Connector & terminal
(B176) No. 18 (+) — Chassis ground (–):
Does the measured value exceed the specified
value?
2 CHECK OUTPUT SIGNAL.
Measure the voltage between the harness con-
nector terminal of keyless entry control module
and chassis ground when moving the door lock
knob to UNLOCK.
Connector & terminal
(B176) No. 17 (+) — Chassis ground (–):
Does the measured value exceed the specified
value?
3 CHECK DOOR LOCK ACTUATOR.
Check the door lock actuator.
Front door lock actuator: <Ref. to SL-22, Front
Door Lock Actuator.>
Rear door lock actuator: <Ref. to SL-26, Rear
Door Lock Actuator.>
Rear gate latch lock actuator: <Ref. to SL-29,
Rear Gate Latch Lock Actuator.>
Is the door lock actuator OK?
DOOR LOCK CONTROL SYSTEM
Step
Step
Value
1 MΩ
Value
10 V
10 V
The door lock actuator is OK.
SL-10
Yes
Check the harness Replace the door
for open circuits or lock switch (actua-
shorts between tor).
the keyless entry
control module
and the door lock
switch.
Yes
Go to step 2. Replace the key-
less entry control
module.
Go to step 3. Replace the key-
less entry control
module.
Check the harness Replace the door
for open circuits or lock actuator.
shorts between
the keyless entry
control module
and the door lock
actuator.
No
No