Subaru Impreza 2003 Service Manual page 3111

Step
3 CHECK KEY CYLINDER LOCK SWITCH.
1)Disconnect the key cylinder lock switch con-
nector.
2)Measure the resistance between key cylin-
der lock switch terminals when turning the key
cylinder lock switch to lock position.
Terminals
No. 1 — No. 2
4 CHECK KEY CYLINDER LOCK SWITCH.
Measure the resistance between key cylinder
lock switch terminals when turning the key cyl-
inder lock switch to unlock position.
Terminals
No. 2 — No. 3
7. CHECK DOOR LOCK ACTUATOR (DOUBLE LOCK) AND CIRCUIT
Step
1 CHECK OUTPUT SIGNAL.
Measure the resistance between double lock
module harness connector terminal and chas-
sis ground when turning the key cylinder lock
switch to lock position.
Connector & terminal
(B324) No. 6 (+) — Chassis ground (–):
2 CHECK OUTPUT SIGNAL.
Measure the resistance between double lock
module harness connector terminal and chas-
sis ground when turning the key cylinder lock
switch to unlock position.
Connector & terminal
(B324) No. 6 (+) — Chassis ground (–):
3 CHECK DOOR LOCK ACTUATOR.
Check 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.>
DOOR LOCK CONTROL SYSTEM
Is the resistance less than 1
Ω?
Is the resistance less than 1
Ω?
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 nor-
mal?
SL-13
Check
Go to step 4.
Check the harness
for open or short
circuits between
double lock mod-
ule and key cylin-
der lock switch.
Check
Check the harness
for open or short
circuits between
double lock mod-
ule and door lock
actuator.
SECURITY AND LOCKS
Yes No
Replace the key
cylinder lock
switch.
Replace the key
cylinder lock
switch.
Yes No
Replace the dou-
ble lock module.
Replace the dou-
ble lock module.
Replace the door
lock actuator.