Subaru Legacy 2003 Service Manual page 3869

SECURITY AND LOCKS
7. CHECK KEY WARNING SWITCH
1 CHECK FUSE.
Remove and visually check fuse No. 6 (in the
main fuse box).
Is the fuse blown?
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 (–):
Does the measured value exceed the spec-
ified value?
3 CHECK KEY WARNING SWITCH CIRCUIT.
1) Remove the key from the ignition switch.
2) Measure the voltage between the harness
connector terminal and chassis ground.
Connector & terminal
(B176) No. 1 (+) — chassis ground (–):
Is the measured value same as the speci-
fied value?
4 CHECK KEY WARNING SWITCH.
1) Disconnect the key warning switch harness
connector.
2) Insert the key into the ignition switch.
(LOCK position)
3) Measure the resistance between the key
warning switch terminals.
Terminal
No. 1 — No. 2:
Is the measured value less than the speci-
fied value?
5 CHECK KEY WARNING SWITCH.
1) Remove the key from the ignition switch.
2) Measure the resistance between the key
warning switch terminals.
Terminal
No. 1 — No. 2:
Does the measured value exceed the spec-
ified value?
KEYLESS ENTRY SYSTEM
Step Value
The fuse is not blown.
10 V
0 V
1 Ω
1 MΩ
SL-16
Yes
Go to step 2. Replace the fuse
with a new one.
Go to step 3. Go to step 4.
The key warning Go to step 4.
switch is OK.
Go to step 5. Replace key warn-
ing switch.
Check the follow- Replace key warn-
ing: ing switch.
• Harness for
open circuits or
shorts between
the key warning
switch and fuse
• Harness for
open circuits or
shorts between
the keyless entry
control module
and key warning
switch
No