Subaru impreza 2004 Quick Reference Manual page 16

SECURITY AND LOCKS
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 posi-
tion.
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:
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 10
Ω?
Is the resistance less than 10
Ω?
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-14
Check
Go to step 2.
Key cylinder lock
switch is OK.
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.
Yes No
Go to step 3.
Go to step 3.
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.