Subaru Impreza 2002 Service Manual page 3548

3. CHECK POWER SUPPLY AND GROUND CIRCUIT
Step
1 CHECK POWER SUPPLY.
1)Disconnect the door lock timer or keyless
entry control module harness connector.
2)Measure the voltage between harness con-
nector terminal and chassis ground.
Connector & terminal
Without keyless entry:
(B92) No. 2 (+) — Chassis ground (–):
(B92) No. 6 (+) — Chassis ground (–):
With keyless entry:
(B176) No. 5 (+) — Chassis ground (–):
(B176) No. 16 (+) — Chassis ground (–):
2 CHECK GROUND CIRCUIT.
Measure the resistance between harness con-
nector terminal and chassis ground.
Connector & terminal
Without keyless entry:
(B92) No. 4 — Chassis ground:
With keyless entry:
(B176) No. 6 — Chassis ground:
(B176) No. 14 — Chassis ground:
4. CHECK DOOR LOCK SWITCH AND CIRCUIT
Step
1 CHECK DOOR LOCK CONTROL SYSTEM
TYPE.
2 CHECK DOOR LOCK SWITCH CIRCUIT.
1)Disconnect the door lock timer harness con-
nector.
2)Measure the resistance between harness
connector terminal and chassis ground when
moving the driver's door lock knob to
UNLOCK.
Connector & terminal
(B92) No. 7 — Chassis ground:
3 CHECK DOOR LOCK SWITCH CIRCUIT.
Measure the resistance between harness con-
nector terminal and chassis ground when the
driver's door lock knob is moved to LOCK.
Connector & terminal
(B92) No. 7 — Chassis ground:
4 CHECK DOOR LOCK SWITCH.
1)Disconnect the driver's door lock switch har-
ness connector.
2)Measure the resistance between door lock
switch terminals when moving the door lock
knob to UNLOCK.
Terminal
No. 1 — No. 2:
5 CHECK DOOR LOCK SWITCH.
Measure the resistance between door lock
switch terminals when moving the door lock
knob to LOCK.
Terminal
No. 1 — No. 2:
DOOR LOCK CONTROL SYSTEM
Is the voltage more than 10 V? Go to step 2.
Is the resistance less than 10
Ω?
Is the vehicle equipped with
keyless entry 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 more than 1
M Ω?
SL-9
Check
Power supply and
ground circuit is
OK.
Check
Go to step 6.
Go to step 3.
Go to step 4.
Go to step 5.
Check the harness
for open circuits or
shorts between
door lock timer
and door lock
switch.
SECURITY AND LOCKS
Yes No
Check the harness
for open circuits or
shorts between
the door lock timer
or keyless entry
control module
and fuse.
Repair the har-
ness.
Yes No
Go to step 2.
Go to step 4.
The door lock
switch is OK.
Replace the door
lock switch.
Replace the door
lock switch.