Subaru Legacy (2005 year). Manual - part 972

SL-11

SECURITY AND LOCKS

Door Lock Control System

3. CHECK POWER SUPPLY AND GROUND CIRCUIT

4. CHECK DOOR LOCK SWITCH

Step

Check

Yes

No

1

CHECK POWER SUPPLY.
1) Disconnect the harness connector of body 
integrated module.
2) Measure the voltage between harness con-
nector terminal and chassis ground.

Connector & terminal

(i84) No. 34 (+) — Chassis ground (

−

):

(B281) No. 2 (+) — Chassis ground (

−

):

Is the voltage more than 10 V? Go to step 2.

Check the harness 
for open or short 
circuit between 
body integrated 
module and fuse.

2

CHECK GROUND CIRCUIT.
Measure the resistance between harness con-
nector terminal and chassis ground.

Connector & terminal

(B280) No. 22 — Chassis ground:
(B281) No. 8, 9, 22 — Chassis ground:

Is the resistance less than 10 
Ω?

The power supply 
and ground circuit 
are OK.

Repair the har-
ness.

Step

Check

Yes

No

1

CHECK DOOR LOCK SWITCH.
Check the input from door lock switch to body 
integrated module using Subaru Select Moni-
tor.
1) Connect the Subaru Select Monitor to data 
link connector.
2) Turn the ignition switch to ON.
3) Select {Integ 

⋅ unit} from main menu.

4) Select {Current Data Display & Save}.
5) Check the input to body integrated module 
by operating the door lock switch.

Is the normal input signal dis-
played when the door lock 
switch is moved to LOCK/
UNLOCK?

The door lock 
switch is OK.

Go to step 2.

2

CHECK DOOR LOCK SWITCH CIRCUIT.
1) Disconnect the body integrated module 
harness connector.
2) Measure the resistance between the har-
ness connector terminal and chassis ground 
when moving the door lock switch to LOCK.

Connector & terminal

(i84) No. 15 — Chassis ground:

Is the resistance less than 10 
Ω?

Go to step 3.

Go to step 4.

3

CHECK DOOR LOCK SWITCH CIRCUIT.
Measure the resistance between the harness 
connector terminal and chassis ground when 
the door lock switch is moved to UNLOCK.

Connector & terminal

(i84) No. 29 — Chassis ground:

Is the resistance less than 10 
Ω?

The door lock 
switch is OK.

Go to step 4.

4

CHECK DOOR LOCK SWITCH.
1) Disconnect the door lock switch harness 
connector.
2) Measure the resistance between the door 
lock switch terminals when moving the door 
lock switch to LOCK.

Connector & terminal

LHD model:

(D7) No. 4 — No. 7:

RHD model:

(D7) No. 4 — No. 14:

Is the resistance less than 1 
Ω?

Go to step 5.

Replace the door 
lock switch.

SL-12

SECURITY AND LOCKS

Door Lock Control System

5. CHECK DOOR LOCK ACTUATOR AND CIRCUIT

5

CHECK DOOR LOCK SWITCH.
Measure the resistance between the door lock 
switch terminals when moving the door lock 
switch to UNLOCK.

Connector & terminal

LHD model:

(D7) No. 5 — No. 7:

RHD model:

(D7) No. 5 — No. 14:

Is the resistance less than 1 
Ω?

Check the harness 
for open circuits or 
shorts between 
the body inte-
grated module and 
the door lock 
switch.

Replace the door 
lock switch.

Step

Check

Yes

No

1

CHECK OUTPUT SIGNAL.
Measure the voltage between the harness con-
nector terminal and chassis ground of body 
integrated module when moving the door lock 
switch to LOCK.

Connector & terminal

(i84) No. 7 (+) — Chassis ground (

−

):

Is the voltage more than 10 V? Go to step 2.

Replace the body 
integrated mod-
ule. <Ref. to SL-
44, Body Inte-
grated Module.>

2

CHECK OUTPUT SIGNAL.
Measure the voltage between the harness con-
nector terminal and chassis ground of body 
integrated module when moving the door lock 
switch to UNLOCK.

Connector & terminal

(i84) No. 8 (+) — Chassis ground (

−

):

Is the voltage more than 10 V? Go to step 3.

Replace the body 
integrated mod-
ule. <Ref. to SL-
44, Body Inte-
grated Module.>

3

CHECK POWER WINDOW MAIN SWITCH 
OUTPUT SIGNAL.
Measure the voltage between the harness con-
nector terminal of power window main switch 
and chassis ground when moving the door lock 
switch to LOCK.

Connector & terminal

(D7) No. 4 (+) — Chassis ground (

−

):

Is the voltage more than 10 V? Go to step 4.

Replace the power 
window main 
switch. <Ref. to 
GW-9, Power Win-
dow Control 
Switch.>

4

CHECK POWER WINDOW MAIN SWITCH 
OUTPUT SIGNAL.
Measure the voltage between the harness con-
nector terminal of power window main switch 
and chassis ground when moving the door lock 
switch to UNLOCK.

Connector & terminal

(D7) No. 5 (+) — Chassis ground (

−

):

Is the voltage more than 10 V? Go to step 5.

Replace the power 
window main 
switch. <Ref. to 
GW-9, Power Win-
dow Control 
Switch.>

5

CHECK DOOR LOCK ACTUATOR.
Check the door lock actuator.
• Front Door Lock Actuator <Ref. to SL-29, 
Front Door Lock Actuator.>
• Rear Door Lock Actuator <Ref. to SL-33, 
Rear Door Lock Actuator.>
• Rear Gate Latch Lock Actuator <Ref. to SL-
35, Rear Gate Latch Assembly.>

Is the door lock actuator OK?

Check the harness 
for open or short 
circuit between 
body integrated 
module and door 
lock actuator.

Replace the door 
lock actuator.

Step

Check

Yes

No

SL-13

SECURITY AND LOCKS

Door Lock Control System

6. CHECK KEY CYLINDER LOCK SWITCH AND CIRCUIT

7. CHECK DOOR LOCK ACTUATOR (DOUBLE LOCK) AND CIRCUIT

Step

Check

Yes

No

1

CHECK KEY CYLINDER LOCK SWITCH CIR-
CUIT.
1) Disconnect the body integrated module 
harness connector.
2) Measure the resistance between harness 
connector terminal and chassis ground when 
turning the key cylinder lock switch to LOCK.

Connector & terminal

(i84) No. 3 — Chassis ground:

Is the resistance less than 10 
Ω?

Go to step 2.

Go to step 3.

2

CHECK KEY CYLINDER LOCK SWITCH CIR-
CUIT.
Measure the resistance between harness con-
nector terminal and chassis ground when turn-
ing the key cylinder lock switch to UNLOCK.

Connector & terminal

(i84) No. 12 — Chassis ground:

Is the resistance less than 10 
Ω?

Key cylinder lock 
switch is OK.

Go to step 3.

3

CHECK KEY CYLINDER LOCK SWITCH.
1) Disconnect the key cylinder lock switch 
connector.
2) Measure the resistance between key cylin-
der lock switch terminals when turning the key 
cylinder lock switch to LOCK.

Terminals

No. 1 — No. 2

Is the resistance less than 1 
Ω?

Go to step 4.

Replace the key 
cylinder lock 
switch.

4

CHECK KEY CYLINDER LOCK SWITCH.
Measure the resistance between key cylinder 
lock switch terminals when turning the key cyl-
inder lock switch to UNLOCK.

Terminals

No. 2 — No. 3

Is the resistance less than 1 
Ω?

Check the harness 
for open or short 
circuits between 
body integrated 
module and key 
cylinder lock 
switch.

Replace the key 
cylinder lock 
switch.

Step

Check

Yes

No

1

CHECK OUTPUT SIGNAL.
Measure the voltage between body integrated 
module harness connector terminal and chas-
sis ground when turning the key cylinder lock 
switch to LOCK.

Connector & terminal

(i84) No. 35 (+) — Chassis ground (–):

Is the voltage more than 10 V? Go to step 2.

Replace the body 
integrated module.

2

CHECK OUTPUT SIGNAL.
Measure the voltage between body integrated 
module harness connector terminal and chas-
sis ground when turning the key cylinder lock 
switch to UNLOCK.

Connector & terminal

(i84) No. 35 (+) — Chassis ground (–):

Is the voltage more than 10 V? Go to step 3.

Replace the body 
integrated module.

3

CHECK DOOR LOCK ACTUATOR.
Check the door lock actuator.
Front door lock actuator: <Ref. to SL-29, Front 
Door Lock Actuator.>
Rear door lock actuator: <Ref. to SL-33, Rear 
Door Lock Actuator.>

Is the door lock actuator nor-
mal?

Check the harness 
for open or short 
circuits between 
body integrated 
module and door 
lock actuator.

Replace the door 
lock actuator.

SL-14

SECURITY AND LOCKS

Keyless Entry System

3. Keyless Entry System

A: WIRING DIAGRAM

1. KEYLESS ENTRY

<Ref. to WI-319, WIRING DIAGRAM, Keyless Entry System.>

B: ELECTRICAL SPECIFICATION

1. CUSTOMIZE SETTING OF SELECT UNLOCK

Switching from all door unlock to select unlock, or select unlock to all door unlock are performed with follow-
ing procedure.
1) Close the driver’s door, and then open it.
2) Insert the key to ignition switch, and then turn the ignition switch from OFF to ON for more than 10 times
within 15 seconds. Complete the procedure in step 1) through 2) within 45 seconds. When the procedures
are completed correctly, the buzzer beeps once. If the buzzer does not beep, repeat the procedures from
step 1).
3) Close the driver’s door.
4) While depressing the door lock switch to lock side, turn the ignition switch from OFF to ON.
5) While depressing the door lock switch to unlock side, turn the ignition switch from ON to OFF, and then re-
lease the door lock switch. Complete the procedure in step 3) through 5) within 30 seconds. When the pro-
cedures are completed correctly, the buzzer beeps twice and door lock, unlock operates automatically. When
the buzzer does not beep, repeat the procedures from step 1).
6) Remove the key from ignition switch, and then complete the procedure.
7) Operate the key button to check that the setting is changed.

2. KEYLESS ENTRY CONTROL MODULE

SL-00228

4 3 2 1
8 7 6 5

i96

To

Remarks

Terminal No.

Measuring conditions

Body integrated module

3 (OUTPUT)

Battery voltage cannot be measured because of digital signal.

Power supply (Backup)

4

Battery voltage is constantly present.

Ground

7

0 V is constantly present.