Subaru Forester 2004 - Page 413

SL-19
SECURITY AND LOCK
Keyless Entry System
7. CHECK KEY WARNING SWITCH
Step Check Yes No
1 CHECK FUSE.
Remove and visually check the fuse No. 6 (in
the main fuse box).
Is the fuse blown out? Go to step 2. Replace the fuse
with a new one.
2 CHECK KEY WARNING SWITCH CIRCUIT.
1) Disconnect the keyless entry control mod-
ule harness connector.
2) Insert the key into ignition switch. (LOCK
position)
3) Measure the voltage between harness con-
nector terminal and chassis ground.
Connector & terminal
(B176) No. 1 (+) — Chassis ground (
− ):
Is the voltage more than 10 V? Go to step 3. Go to step 4.
3 CHECK KEY WARNING SWITCH CIRCUIT.
1) Remove the key from ignition switch.
2) Measure the voltage between harness con-
nector terminal and chassis ground.
NOTE:
The voltage is not 0 V due to noise, etc.
Connector & terminal
(B176) No. 1 (+) — Chassis ground (
− ):
Is the voltage approx. less than
0 V?
The key warning
switch is OK.
Go to step 4.
4 CHECK KEY WARNING SWITCH.
1) Disconnect the key warning switch harness
connector.
2) Insert the key into ignition switch. (LOCK
position)
3) Measure the resistance between key warn-
ing switch terminals.
Terminal
No. 1 — No. 2:
Is the resistance less than 1
Ω?
Go to step 5. Replace the key
warning switch.
5 CHECK KEY WARNING SWITCH.
1) Remove the key from ignition switch.
2) Measure the resistance between key warn-
ing switch terminals.
Terminal
No. 1 — No. 2:
Is the resistance less than 1
MΩ?
Check the follow-
ing:
•Harness for
open circuits or
shorts between
the key warn-
ing switch and
fuse
•Harness for
open circuits
and shorts
between the
keyless entry
control module
and key warn-
ing switch
Replace the key
warning switch.