Subaru Impreza 2003 Service Manual page 3116

SECURITY AND LOCKS
6. CHECK DOOR SWITCH
Step
1 CHECK DOOR SWITCH CIRCUIT.
Measure the voltage between keyless entry
control module harness connector terminal
and chassis ground.
Connector & terminal
Without double lock:
(B176) No. 3 (+) — Chassis ground (–):
With double lock:
(B176) No. 3 (+) — Chassis ground (–):
(B325) No. 17 (+) — Chassis ground (–):
2 CHECK DOOR SWITCH CIRCUIT.
Measure the voltage between keyless entry
control module harness connector terminal
and chassis ground.
Connector & terminal
Without double lock:
(B176) No. 3 (+) — Chassis ground (–):
With double lock
(B176) No. 3 (+) — Chassis ground (–):
(B325) No. 17 (+) — Chassis ground (–):
3 CHECK DOOR SWITCH.
1)Disconnect the door switch harness connec-
tor.
2)Measure the resistance between door switch
terminals.
Terminal
Door switch No. 1 — No. 3:
Rear gate latch switch No. 1 — No. 2:
4 CHECK DOOR SWITCH.
Measure the resistance between door switch
terminals.
Terminal
Door switch No. 1 — No. 3:
Rear gate latch switch No. 1 — No. 2:
KEYLESS ENTRY SYSTEM
Is the voltage 0 V when any
one of doors or rear gate is
opened?
Is the voltage more than 10 V
when all doors and rear gate
are closed?
Is the resistance more than 1
MΩ when door switch is
pushed?
Is the resistance less than 1 Ω
when door switch is released?
SL-18
Check
Go to step 2.
The door switch is
OK.
Go to step 4.
Check the follow-
ing:
• Without double
lock: Check the
harness for open
circuits or shorts
between keyless
entry control mod-
ule and door
switch.
• With double
lock: Check the
harness for open
circuits or short
between keyless
entry control mod-
ule and door
switch, between
double lock mod-
ule and door
switch, and
between check
connector and
door switch.
Yes No
Go to step 3.
Go to step 3.
Replace the door
switch.
Replace the door
switch.