Subaru IMPREZA GD 2007 Series Manual page 4114

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SECURITY AND LOCKS
8. CHECK KEY WARNING SWITCH
Step
1 CHECK FUSE.
Remove and visually check the 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 ignition switch. (LOCK
position)
3) Measure the voltage between harness con-
nector terminal and chassis ground.
Connector & terminal
(B176) No. 9 (+) — Chassis ground (–):
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:
If there is electrical noise, it may not be at 0 V.
Connector & terminal
(B176) No. 9 (+) — Chassis ground (–):
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.
Terminals
No. 1 — No. 2:
5 CHECK KEY WARNING SWITCH.
1) Remove the key from ignition switch.
2) Measure the resistance between key warn-
ing switch terminals.
Terminals
No. 1 — No. 2:
Keyless Entry System
Check
Is the fuse blown out?
Is the voltage 10 V or more?
Is the voltage 0 V?
Is the resistance less than 1 Ω? Go to step 5.
Is the resistance 1 MΩ or
more?
SL-18
Yes No
Replace the fuse Go to step 2.
with a new part.
Go to step 3. Go to step 4.
The key warning Go to step 4.
switch is OK.
Replace the key
warning switch.
Check the follow- Replace the key
ing: warning switch.
• Harness for
open circuits and
shorts between the
key warning switch
and fuse
• Harness for
open circuits and
shorts between the
keyless entry con-
trol module and the
key warning
switch.