Subaru Legacy 2004 Service Manual page 3839

3. CHECK FUSE
Step
1 CHECK FUSE.
Remove and visually check the fuse No. 3 (in
the fuse and relay box) and No. 7 (in the fuse
and relay box).
4. CHECK KEYLESS ENTRY CONTROL MODULE
Step
1 CHECK DIAGNOSTIC TROUBLE CODE
(DTC)
1) Connect the Subaru Select Monitor to data
link connector.
2) Turn the ignition switch to ON.
3) Select {Body integrated unit} from main
menu.
4) Select the {Diagnostic Trouble Code}.
5) Check that the DTC is displayed.
2 CHECK POWER SUPPLY.
1) Disconnect the keyless entry control mod-
ule harness connector.
2) Measure the voltage between the harness
connector terminal and chassis ground.
Connector & terminal
(i96) No. 4 (+) — Chassis ground (
3 CHECK GROUND CIRCUIT.
Measure the resistance between the harness
connector terminal and chassis ground.
Connector & terminal
(i96) No. 7 — Chassis ground:
4 CHECK KEYLESS ENTRY CONTROL MOD-
ULE CIRCUIT.
1) Disconnect harness connector of body inte-
grated unit.
2) Measure the resistance between harness
connector terminals.
Connector & terminal
(i84) No. 9 — (i96) No. 3:
Keyless Entry System
Check
Is the fuse blown out?
Check
Is DTC B0500 "Keyless UART
com. Malfunction" displayed?
Is the voltage more than 10 V? Go to step 3.
"
):
Is the resistance less than 10
#?
Is the resistance less than 10
#?
SL-21
SECURITY AND LOCKS
Yes
Replace the fuse Check the power
with a new one. supply and ground
circuit. <Ref. to
SL-22, CHECK
BODY INTE-
GRATED UNIT
POWER SUPPLY
AND GROUND
CIRCUIT,
INSPECTION,
Keyless Entry Sys-
tem.>
Yes
Go to step 2. Keyless entry con-
trol module is nor-
mal.
Check the harness
for open circuits
and shorts
between the key-
less entry control
module and fuse.
Go to step 4. Repair the har-
ness.
Replace the key- Repair the har-
less entry control ness.
module. <Ref. to
SL-45, Keyless
Entry Control
Unit.>
No
No