Subaru Legacy 2002 Service Manual page 3019

Security and Locks
6. CHECK DOOR SWITCH
No.
1 CHECK DOOR SWITCH CIRCUIT.
Measure the voltage between the keyless
entry control module harness connector termi-
nal and chassis ground.
Connector & terminal
Front and rear door:
(B176) No. 3 (+) — Chassis ground (–):
Rear gate:
(B176) No. 4 (+) — Chassis ground (–):
2 CHECK DOOR SWITCH CIRCUIT.
Measure the voltage between the keyless
entry control module harness connector termi-
nal and chassis ground.
Connector & terminal
Front and rear door:
(B176) No. 3 (+) — chassis ground (–):
Rear gate:
(B176) No. 4 (+) — chassis ground (–):
3 CHECK DOOR SWITCH.
1) Disconnect the door switch harness con-
nector.
2) Measure the resistance between the door
switch terminals.
Terminal
Front LH No. 1 — No. 3:
Front RH No. 1 — No. 3:
Rear LH No. 1 — No. 3:
Rear RH No. 1 — No. 3:
Rear gate No. 1 — No. 2:
4 CHECK DOOR SWITCH.
Measure the resistance between the door
switch terminals.
Terminal
Front LH No. 1 — No. 3:
Front RH No. 1 — No. 3:
Rear LH No. 1 — No. 3:
Rear RH No. 1 — No. 3:
Rear gate No. 1 — No. 2:
7. CHECK KEY WARNING SWITCH
No.
1 CHECK FUSE.
Remove and visually check fuse No. 6 (in the
main fuse box).
2 CHECK KEY WARNING SWITCH CIRCUIT.
1) Disconnect the keyless entry control mod-
ule harness connector.
2) Insert the key into the ignition switch.
(LOCK position)
3) Measure the voltage between the harness
connector terminal and chassis ground.
Connector & terminal
(B176) No. 1 (+) — chassis ground (–):
KEYLESS ENTRY SYSTEM
S909345A1007
Step
Is the voltage 0 V when
each door and rear gate is
open?
Is the voltage approx. 10 V
when each door and rear
gate is closed?
Is the resistance more than
1 MΩ when the door switch
is pushed?
Is the resistance less than
1 Ω when the door switch
is released?
S909345A1008
Step
Is the fuse blown? (15A)
Is the voltage more than 10
V?
SL-16
Check Yes
Go to step 2.
The door switch is
OK.
Go to step 4.
Check the har-
ness for open cir-
cuits or shorts
between the key-
less entry control
module and door
switch.
Check Yes
Replace the fuse
with a new one.
Go to step 3.
No
Go to step 3.
Go to step 3.
Replace the door
switch.
Replace the door
switch.
No
Go to step 2.
Go to step 4.