Subaru Legacy IV (2008 year). Manual — part 1110

SL-13

Keyless Entry System

SECURITY AND LOCKS

3. Keyless Entry System

A: WIRING DIAGRAM

1. KEYLESS ENTRY

For wiring diagrams related to the keyless entry system, refer to “Keyless Entry System” in Section WI. <Ref.
to WI-190, WIRING DIAGRAM, Keyless Entry System.>

B: ELECTRICAL SPECIFICATION

1. KEYLESS ENTRY CONTROL MODULE

2. BODY INTEGRATED UNIT

Refer to the Control Module I/O Signal of the LAN SYSTEM (DIAGNOSTICS). <Ref. to LAN(diag)-9, ELEC-
TRICAL SPECIFICATION, Control Module I/O Signal.>

Remarks

Terminal No.

Measuring condition

-

1

-

-

2

-

Body integrated unit

3 (OUTPUT)

Battery voltage cannot be measured because of digital signal.

Power supply (Backup)

4

Battery voltage is constantly present.

-

5

-

-

6

-

Ground

7

0 V is constantly present.

SL-00946

4 3 2 1
8 7 6 5

i96

TO

SL-14

Keyless Entry System

SECURITY AND LOCKS

C: INSPECTION

1. SYMPTOM CHART

Symptom

Repair order

Reference

None of the functions of the keyless
entry system operate.

1. Check the transmitter battery.

<Ref. to SL-16, CHECK KEYLESS
TRANSMITTER BATTERY AND FUNC-
TION, INSPECTION, Keyless Entry Sys-
tem.>

2. Remove and visually check the fuse No. 2
(in the fuse & relay box) and No. 7 (in the fuse
& relay box).

If the fuse is blown out, replace the fuse
with a new part.
When there is no defective with the fuse,
check the power supply and ground cir-
cuit. <Ref. to SL-8, CHECK POWER
SUPPLY AND GROUND CIRCUIT,
INSPECTION, Door Lock Control Sys-
tem.>

3. Check the keyless entry control module.

<Ref. to SL-17, CHECK KEYLESS
ENTRY CONTROL MODULE, INSPEC-
TION, Keyless Entry System.>

4. Check the power supply and ground circuit
for body integrated unit.

<Ref. to SL-8, CHECK POWER SUPPLY
AND GROUND CIRCUIT, INSPECTION,
Door Lock Control System.>

5. Check the key warning switch.

<Ref. to SL-20, CHECK KEY WARNING
SWITCH, INSPECTION, Keyless Entry
System.>

6. Check the door switch.

<Ref. to SL-18, CHECK DOOR SWITCH,
INSPECTION, Keyless Entry System.>

7. Check the body integrated unit.

<Ref. to LAN(diag)-2, Basic Diagnostic
Procedure.>

The keyless transmitter cannot be
registered.

1. Check the key warning switch.

<Ref. to SL-20, CHECK KEY WARNING
SWITCH, INSPECTION, Keyless Entry
System.>

2. Check the door lock switch signal.

<Ref. to SL-23, CHECK DOOR LOCK
SWITCH, INSPECTION, Keyless Entry
System.>

3. Check the ignition switch.

<Ref. to SL-26, CHECK IGNITION
SWITCH, INSPECTION, Keyless Entry
System.>

4. Check the door switch.

<Ref. to SL-18, CHECK DOOR SWITCH,
INSPECTION, Keyless Entry System.>

5. Check the body integrated unit.

<Ref. to LAN(diag)-2, Basic Diagnostic
Procedure.>

Door lock or unlock does not operate.

NOTE:
If the door lock control system does
not operate when using the door lock
switch, check the door lock control
system. <Ref. to SL-7, INSPECTION,
Door Lock Control System.>

1. Check the transmitter battery.

<Ref. to SL-16, CHECK KEYLESS
TRANSMITTER BATTERY AND FUNC-
TION, INSPECTION, Keyless Entry Sys-
tem.>

2. Check the keyless entry control module.

<Ref. to SL-17, CHECK KEYLESS
ENTRY CONTROL MODULE, INSPEC-
TION, Keyless Entry System.>

3. Check the key warning switch.

<Ref. to SL-20, CHECK KEY WARNING
SWITCH, INSPECTION, Keyless Entry
System.>

4. Check the door switch.

<Ref. to SL-18, CHECK DOOR SWITCH,
INSPECTION, Keyless Entry System.>

5. Check the body integrated unit.

<Ref. to LAN(diag)-2, Basic Diagnostic
Procedure.>

SL-15

Keyless Entry System

SECURITY AND LOCKS

The panic alarm does not operate.

1. Check the keyless transmitter battery and
function.

<Ref. to SL-16, CHECK KEYLESS
TRANSMITTER BATTERY AND FUNC-
TION, INSPECTION, Keyless Entry Sys-
tem.>

2. Check the horn operation.

<Ref. to SL-24, CHECK HORN OPERA-
TION, INSPECTION, Keyless Entry Sys-
tem.>

3. Check the body integrated unit.

<Ref. to LAN(diag)-2, Basic Diagnostic
Procedure.>

Trunk lid unlock does not operate.
(Sedan model)

1. Check the transmitter battery.

<Ref. to SL-16, CHECK KEYLESS
TRANSMITTER BATTERY AND FUNC-
TION, INSPECTION, Keyless Entry Sys-
tem.>

2. Check the keyless entry control module.

<Ref. to SL-17, CHECK KEYLESS
ENTRY CONTROL MODULE, INSPEC-
TION, Keyless Entry System.>

3. Check the key warning switch.

<Ref. to SL-20, CHECK KEY WARNING
SWITCH, INSPECTION, Keyless Entry
System.>

4. Check the trunk lid lock actuator.

<Ref. to SL-23, CHECK TRUNK LID
LOCK ACTUATOR, INSPECTION, Key-
less Entry System.>

5. Check the body integrated unit.

<Ref. to LAN(diag)-2, Basic Diagnostic
Procedure.>

Buzzer and hazard light do not
operate.

1. Check the buzzer operation.

<Ref. to SL-25, CHECK KEYLESS
BUZZER, INSPECTION, Keyless Entry
System.>

2. Check the hazard light operation.

<Ref. to SL-22, CHECK HAZARD LIGHT
OPERATION, INSPECTION, Keyless
Entry System.>

3. Check the body integrated unit.

<Ref. to LAN(diag)-2, Basic Diagnostic
Procedure.>

Room light does not operate.

1. Check the room light operation.

<Ref. to SL-21, CHECK ROOM LIGHT
OPERATION, INSPECTION, Keyless
Entry System.>

2. Check the body integrated unit.

<Ref. to LAN(diag)-2, Basic Diagnostic
Procedure.>

Ignition switch illumination does not
operate.

1. Check the ignition switch illumination.

<Ref. to SL-24, CHECK IGNITION
SWITCH ILLUMINATION, INSPECTION,
Keyless Entry System.>

2. Check the body integrated unit.

<Ref. to LAN(diag)-2, Basic Diagnostic
Procedure.>

Symptom

Repair order

Reference

SL-16

Keyless Entry System

SECURITY AND LOCKS

2. CHECK KEYLESS TRANSMITTER BATTERY AND FUNCTION

CAUTION:
Be sure to reset keyless transmitter of other vehicles registered to the inspection target vehicle, and
vehicles to which keyless transmitters were registered for inspection, to the condition before per-
forming the inspection. (Re-register the keyless transmitters.)

Step

Check

Yes

No

1

CHECK KEYLESS TRANSMITTER BAT-
TERY.
1) Remove the battery from the keyless trans-
mitter. <Ref. to SL-57, REMOVAL, Transmitter.>
2) Check the battery voltage. <Ref. to SL-57,
INSPECTION, Transmitter.>

Is the voltage 2.5 V or more?

Go to step 2.

Replace the key-
less transmitter
battery. <Ref. to
SL-57, Transmit-
ter.>

2

CHECK KEYLESS TRANSMITTER.
Register the keyless transmitter which operates
normally on other vehicles to the inspection tar-
get vehicle. <Ref. to SL-58, REGISTRATION
OF KEYLESS TRANSMITTER WITH SUBARU
SELECT MONITOR, REPLACEMENT, Trans-
mitter.>
1) Close all the doors and rear gate of inspec-
tion target vehicle.
2) Using the keyless transmitter, lock and
unlock the doors and rear gate of vehicle.

Can the check vehicle be
locked and unlocked properly?

Go to step 3.

Due to vehicle mal-
function, continue
the keyless entry
system diagnosis.

3

CHECK KEYLESS TRANSMITTER.
Register the keyless transmitter of the
inspected vehicle to another vehicle whose key-
less system operates normally. <Ref. to SL-58,
REGISTRATION OF KEYLESS TRANSMIT-
TER WITH SUBARU SELECT MONITOR,
REPLACEMENT, Transmitter.>

Is the keyless transmitter regis-
tered correctly?

Go to step 4.

Replace the trans-
mitter. <Ref. to SL-
58, REGISTRA-
TION OF KEY-
LESS
TRANSMITTER
WITH SUBARU
SELECT MONI-
TOR, REPLACE-
MENT,
Transmitter.>

4

CHECK KEYLESS TRANSMITTER.
Check the registered keyless transmitter.
1) Close all the doors and rear gate of the vehi-
cle which keyless system operates normally.
2) Using the keyless transmitter, lock and
unlock the doors and rear gate of vehicle.

Does the vehicle operate lock
and unlock normally?

The keyless trans-
mitter is OK.

Replace the trans-
mitter. <Ref. to SL-
58, REGISTRA-
TION OF KEY-
LESS
TRANSMITTER
WITH SUBARU
SELECT MONI-
TOR, REPLACE-
MENT,
Transmitter.>