Subaru Impreza 2003 Service Manual page 3119

10.CHECK IGNITION SWITCH ILLUMINATION CIRCUIT
Step
1 CHECK IGNITION SWITCH ILLUMINATION
POWER SUPPLY.
1)Disconnect the ignition switch illumination
harness connector.
2)Measure the voltage between ignition switch
illumination harness connector terminal and
chassis ground.
Connector & terminal
(B224) No. 1 (+) — Chassis ground (–):
2 CHECK HARNESS BETWEEN IGNITION
SWITCH ILLUMINATION AND KEYLESS EN-
TRY CONTROL MODULE (WITHOUT DOU-
BLE LOCK) OR DOUBLE LOCK MODULE
(WITH DOUBLE LOCK).
1)Disconnect the keyless entry control module
or double lock module harness connector.
2)Measure the resistance between keyless
entry or double lock module harness connector
terminal and ignition switch illumination har-
ness connector.
Connector & terminal
Without double lock:
(B176) No. 11 — (R224) No. 2:
With double lock:
(B325) No. 1 — (R224) No. 2:
(B79) No. 13 — (R224) No. 2:
11.CHECK OUTPUT SIGNAL TO DOUBLE LOCK MODULE
Step
1 CHECK OUTPUT SIGNAL.
Measure the voltage between the keyless
entry control module harness connector termi-
nal and chassis ground when OPEN button of
transmitter is pressed.
Connector & terminal
(B176) No. 17 (+) — Chassis ground (–):
2 CHECK OUTPUT SIGNAL.
Measure the voltage between the keyless
entry control module harness connector termi-
nal and chassis ground when LOCK button of
transmitter is pressed.
Connector & terminal
(B176) No. 18 (+) — Chassis ground (–):
KEYLESS ENTRY SYSTEM
Is the voltage more than 10 V? Go to step 2.
Is the resistance less than 10
Ω?
Is the voltage more than 10 V? Go to step 2.
Is the voltage more than 10 V? Replace the dou-
SL-21
Check
Check the ignition
switch illumina-
tion. If NG, replace
the ignition switch
illumination.
Check
ble lock module.
SECURITY AND LOCKS
Yes No
Check the harness
for open circuit or
shorts between
ignition switch illu-
mination and fuse.
Check the follow-
ing:
• Without double
lock: Check the
harness for open
circuit or short
between keyless
entry control mod-
ule and ignition
switch illumination.
• With double
lock: Check the
harness for open
circuit or short
between double
lock unit and igni-
tion switch illumi-
nation, and
between check
connector and
ignition switch illu-
mination.
Yes No
Replace the key-
less entry control
module.
Check the harness
for open circuit or
shorts between
the keyless entry
control module
and double lock
module.