Subaru Legacy (2005 year). Manual - part 973

SL-15

SECURITY AND LOCKS

Keyless Entry System

3. BODY INTEGRATED MODULE

Remarks

Terminal No.

Measuring conditions

Ignition switch (ON)

A1 (INPUT)

Battery voltage is present when ignition switch is turned ON.

Door and rear gate lock actuator 
(Model without double lock)
Front double lock actuator RH, door 
and rear gate lock actuator (Model 
with double lock)

A7 (OUTPUT)

Battery voltage is present when pressing the LOCK button of keyless 
transmitter.

Door and rear gate lock actuator

A8 (OUTPUT)

Battery voltage is present when pressing the UNLOCK button of keyless 
transmitter.

Keyless entry control module

A9 (INPUT)

Communication line (Cannot be measured because of digital signal)

Double lock condition detecting 
switch (Model with double lock)

A16 (OUTPUT)

Battery voltage is present when pressing the LOCK button of keyless 
transmitter.

Trunk lid switch or rear gate latch 
switch

A17 (INPUT)

0 V is present when opening the trunk lid or rear gate.

Rear door switch RH

A18 (INPUT)

0 V is present when opening the rear door RH.

Front door switch RH

A19 (INPUT)

0 V is present when opening the front door RH.

Ground

A21

0 V is constantly present.

Trunk lid actuator

A22 (OUTPUT)

Battery voltage is present when pressing the TRUNK button of keyless 
transmitter.

Front door actuator driver’s side 
(Model without double lock)

A23 (OUTPUT)

Battery voltage is present when pressing the UNLOCK button of keyless 
transmitter.

Power window main switch (door 
lock switch)

A26

CAN communication line (Cannot be measured because of digital sig-
nal)

A27

Rear door switch LH

A31 (INPUT)

0 V is present when opening the rear door LH.

Front door switch LH

A32 (INPUT)

0 V is present when opening the front door LH.

Power supply

A34

Battery voltage is constantly present.

Front double lock actuator RH 
(Model with double lock)

A35 (OUTPUT)

Battery voltage is present when pressing the LOCK button of keyless 
transmitter.

Room light

B3 (INPUT)

• 0 V is present when pressing the UNLOCK button of keyless transmit-
ter.
• 0 V is present when opening the door.

Power supply

B7

Battery voltage is constantly present.

Turn signal & hazard circuit

B12 (OUTPUT)

0 V is present when pressing the LOCK button or UNLOCK button of 
keyless transmitter.

Ground

B22

0 V is constantly present.

SL-00229

A

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

C

5

6

7

8

2 1
9

4

3

10

24

22

23

25

11

12

13

14

15

26

27

28

16

17

18

19

20

21

B

5 4

6

7

8

2 1

9

3

10

22

23

11

12

13

14

15

24

25

26

27

16

17

18

28

29

19

20

21

30

SL-16

SECURITY AND LOCKS

Keyless Entry System

C: INSPECTION

1. SYMPTOM CHART

Power supply

C1

Battery voltage is constantly present.

Power supply

C2

Battery voltage is constantly present.

Key warning switch

C7 (INPUT)

Battery voltage is present when inserting the key into ignition switch.

Ground

C8

0 V is constantly present.

Ground

C9

0 V is constantly present.

Registration connector

C22

0 V is present when connecting the registration connector.

Symptom

Repair order

Reference

None of the functions of keyless entry 
system operate.

1. Check the keyless transmitter battery.

<Ref. to SL-18, CHECK KEYLESS 
TRANSMITTER BATTERY AND 
FUNCTION, INSPECTION, Keyless 
Entry System.>

2. Check the fuse.

<Ref. to SL-19, CHECK FUSE, 
INSPECTION, Keyless Entry Sys-
tem.>

3. Check the keyless entry control module.

<Ref. to SL-19, CHECK KEYLESS 
ENTRY CONTROL MODULE, 
INSPECTION, Keyless Entry Sys-
tem.>

4. Check the power supply, ground circuit and 
registration connector circuit for the body inte-
grated module.

<Ref. to SL-20, CHECK BODY INTE-
GRATED MODULE POWER SUP-
PLY, GROUND CIRCUIT AND 
REGISTERED CONNECTOR CIR-
CUIT, INSPECTION, Keyless Entry 
System.>

5. Check the key warning switch.

<Ref. to SL-22, CHECK KEY WARN-
ING SWITCH, INSPECTION, Keyless 
Entry System.>

6. Check the door switch.

<Ref. to SL-21, CHECK DOOR 
SWITCH, INSPECTION, Keyless 
Entry System.>

7. Check the body integrated module.

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

The keyless transmitter cannot be 
registered.

1. Check the keyless transmitter battery.

<Ref. to SL-18, CHECK KEYLESS 
TRANSMITTER BATTERY AND 
FUNCTION, INSPECTION, Keyless 
Entry System.>

2. Check registration connector circuit.

<Ref. to SL-20, CHECK REGISTRA-
TION CONNECTOR., INSPECTION, 
Keyless Entry System.>

3. Check the key warning switch.

<Ref. to SL-22, CHECK KEY WARN-
ING SWITCH, INSPECTION, Keyless 
Entry System.>

4. Check the door lock switch signal.

<Ref. to SL-24, CHECK DOOR LOCK 
SWITCH, INSPECTION, Keyless 
Entry System.>

5. Check the body integrated module.

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

Remarks

Terminal No.

Measuring conditions

SL-17

SECURITY AND LOCKS

Keyless Entry System

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-10, INSPEC-
TION, Door Lock Control System.>

1. Check the keyless transmitter battery.

<Ref. to SL-18, CHECK KEYLESS 
TRANSMITTER BATTERY AND 
FUNCTION, INSPECTION, Keyless 
Entry System.>

2. Check the keyless entry control module.

<Ref. to SL-19, CHECK KEYLESS 
ENTRY CONTROL MODULE, 
INSPECTION, Keyless Entry Sys-
tem.>

3. Check the key warning switch.

<Ref. to SL-22, CHECK KEY WARN-
ING SWITCH, INSPECTION, Keyless 
Entry System.>

4. Check the door switch.

<Ref. to SL-21, CHECK DOOR 
SWITCH, INSPECTION, Keyless 
Entry System.>

5. Check the body integrated module.

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

Trunk lid unlock does not operate. 
(Sedan model)

1. Check the keyless transmitter battery.

<Ref. to SL-18, CHECK KEYLESS 
TRANSMITTER BATTERY AND 
FUNCTION, INSPECTION, Keyless 
Entry System.>

2. Check the keyless entry control module.

<Ref. to SL-19, CHECK KEYLESS 
ENTRY CONTROL MODULE, 
INSPECTION, Keyless Entry Sys-
tem.>

3. Check the key warning switch.

<Ref. to SL-22, CHECK KEY WARN-
ING SWITCH, INSPECTION, Keyless 
Entry System.>

4. Check the trunk lid lock actuator.

<Ref. to SL-24, CHECK TRUNK LID 
LOCK ACTUATOR, INSPECTION, 
Keyless Entry System.>

5. Check the body integrated module.

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

Hazard light does not operate.

1. Check the hazard light operation.

<Ref. to SL-23, CHECK HAZARD 
LIGHT OPERATION, INSPECTION, 
Keyless Entry System.>

2. Check the body integrated module.

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

Room light does not operate.

1. Check the room light operation.

<Ref. to SL-23, CHECK ROOM 
LIGHT OPERATION, INSPECTION, 
Keyless Entry System.>

2. Check the body integrated module.

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

Ignition switch illumination does not 
operate.

1. Check the ignition switch illumination.

<Ref. to SL-25, CHECK IGNITION 
SWITCH ILLUMINATION, INSPEC-
TION, Keyless Entry System.>

2. Check the body integrated module.

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

Symptom

Repair order

Reference

SL-18

SECURITY AND LOCKS

Keyless Entry System

2. CHECK KEYLESS TRANSMITTER BATTERY AND FUNCTION

CAUTION:
Be sure to reset the keyless transmitter, which is registered from other vehicle to inspection target 
vehicle, and the vehicle, to which is registered keyless transmitter, to the condition of before inspec-
tion. (Register the keyless transmitter to original condition.)

Step

Check

Yes

No

1

CHECK KEYLESS TRANSMITTER BAT-
TERY.
1) Remove the battery from keyless transmit-
ter. <Ref. to SL-45, DISASSEMBLY, Keyless 
Transmitter.>
2) Check the battery voltage. <Ref. to SL-45, 
INSPECTION, Keyless Transmitter.>

Is the voltage more than 2.5 V? Go to step 2.

Replace the key-
less transmitter 
battery. <Ref. to 
SL-45, Keyless 
Transmitter.>

2

CHECK KEYLESS TRANSMITTER.
Register the keyless transmitter which oper-
ates normally on other vehicles to inspection 
target vehicle. <Ref. to SL-45, REGISTRA-
TION OF KEYLESS TRANSMITTER, 
REPLACEMENT, Keyless Transmitter.>
1) Close all the doors and rear gate of inspec-
tion target vehicle.
2) Using keyless transmitter, lock and unlock 
the doors and rear gate of inspection target 
vehicle.
3) Using keyless transmitter, unlock the trank 
lid of inspection target vehicle. (Sedan model)

Is the inspection target vehicle 
operates lock, unlock and trank 
lid unlock normally?

Go to step 3.

Due to vehicle 
malfunction, con-
tinue the keyless 
entry system diag-
nosis.

3

CHECK KEYLESS TRANSMITTER.
Register the keyless transmitter of inspection 
target vehicle to another vehicle which oper-
ates keyless system normally. <Ref. to SL-45, 
REGISTRATION OF KEYLESS TRANSMIT-
TER, REPLACEMENT, Keyless Transmitter.>

Is the keyless transmitter regis-
tered correctly?

Go to step 4.

Replace the key-
less transmitter. 
<Ref. to SL-45, 
REGISTRATION 
OF KEYLESS 
TRANSMITTER, 
REPLACEMENT, 
Keyless Transmit-
ter.>

4

CHECK KEYLESS TRANSMITTER.
Check the registered keyless transmitter.
1) Close all the doors and rear gate of the 
vehicle which operates keyless system nor-
mally.
2) Using keyless transmitter, lock and unlock 
the doors and rear gate of vehicle.
3) Using keyless transmitter, unlock the trank 
lid of inspection target vehicle. (Sedan model)

Is the vehicle operates lock, 
unlock and trank lid unlock nor-
mally?

Keyless transmit-
ter is normal.

Replace the key-
less transmitter. 
<Ref. to SL-45, 
REGISTRATION 
OF KEYLESS 
TRANSMITTER, 
REPLACEMENT, 
Keyless Transmit-
ter.>