Subaru Legacy IV (2008 year). Manual - part 1169

LAN(diag)-10

Control Module I/O Signal

LAN SYSTEM (DIAGNOSTICS)

Manual switch (UNLOCK)

i84

29

 Less than 1 

:

Door unlock switch ON

Door lock power supply

i84

34

10 — 13 V

Always

All door lock output

i84

7

10 — 13 V

Manual lock switch, door key switch ON

Driver’s door UNLOCK 
output

i84

23

10 — 13 V

Driver’s seat unlock signal ON

All door UNLOCK output

i84

8

10 — 13 V

ALL door unlock signals ON

Rear gate UNLOCK output

i84

22

10 — 13 V

When the rear gate release switch ON 

with all seats unlocked

Key/shift lock power supply

B281

1

10 — 13 V

Always

Shift lock output

B280

6

10 — 13 V

Ignition switch ON, shift position “P” 

range, foot brake ON (Only AT)

Key locking output

B280

5

10 — 13 V

Except P range, ignition key is inserted, 

ignition switch ON (AT model)

Wiper deicer switch

i84

14

 Less than 1 

:

Wiper deicer switch ON

Wiper deicer relay output

B280

14

1 V or less

Wiper deicer relay ON

Rear defogger switch

i84

28

Less than 1 

:

Rear defogger switch ON

Rear defogger relay output

B280

16

1 V or less

Rear defogger relay ON

Shift switch (ON)

B281

26

Less than 1 

:

At Manual mode

Shift switch (UP)

B281

15

Less than 1 

:

At Manual mode UP

Shift switch (DOWN)

B281

25

Less than 1 

:

At Manual mode DOWN

P range switch

B281

13

Less than 1 

:

Shift range P position

Impact sensor

B281

5

8 V or more

(pulse signal is usually used)

Impact sensor ON 

(Model with impact sensor)

Fuel level sensor

B281

19

0 — 102.3 

:

Resistance differs according to the fuel 

level (displays resistance combining 

level gauge main and sub)

Ambient sensor

B281

3

0.5 — 4.5 V

SIG

B281

10

0 V

GND

Seat belt switch 
(driver’s seat)

i84

4

Less than 1 

:

When driver’s seat belt is not worn

Seat belt switch 
(Passenger’s seat)

i84

13

Less than 1 

:

When passenger’s seat belt is not worn

Seat belt warning light 
(driver’s seat)

i84

20

Less than 1 

:

When driver’s seat belt is worn

Seat belt warning light 
(Passenger’s seat)

B281

27

Less than 1 

:

When passenger’s seat belt is worn

Rear wiper switch (ON)

B281

6

Less than 1 

:

Rear wiper switch ON

Rear wiper switch (INT)

B281

18

Less than 1 

:

Rear wiper switch ON

Rear washer switch

B281

27

Less than 1 

:

Rear washer switch ON

Rear wiper power supply

B280

21

10 — 13 V

Ignition switch ON

Rear wiper ON output

B280

1

10 — 13 V

Rear wiper switch ON

Rear wiper return

B280

8

10 — 13 V

At wiper reversing

1 — 8

10 — 13 V

Room light output

B280

3

1 V or less

When LOCK, UNLOCK 

with keyless entry

Key ring illumination output

B280

4

1 V or less

Ignition key removed, 

driver’s door open

Turn hazard output

B280

12

1 V or less

When operating keyless entry 

answer back

Keyless Buzzer Output

i84

6

10 — 13 V

When operating keyless entry 

answer back

Description

Connector 

No.

Terminal 

No.

Signal (V)

Note

Ignition switch ON

(engine OFF)

LAN(diag)-11

Control Module I/O Signal

LAN SYSTEM (DIAGNOSTICS)

B: WIRING DIAGRAM

<Ref. to WI-200, WIRING DIAGRAM, CAN Communication System.> <Ref. to WI-114, AUTO A/C MODEL,
WIRING DIAGRAM, Air Conditioning System.>

Security horn output

B280

11

1 V or less

When operating security horn

Security indicator light 
output

i84

33

Approx. 1 V

At ignition key removed, 

immobilizer operating

TPMS registration check 
signal input

B281

4

1 V or less

When inputting registration 

check signal

Keyless communication

i84

9

Serial communication

At keyless entry signal received

High speed CAN circuit

B280

20

Between B20 — B30

Serial communication

At communicating 

(sending and receiving)

High speed CAN circuit

B280

30

Low-speed CAN circuit 1

i84

27

Between A26 — A27

Serial communication

At communicating 

(sending and receiving)

Low-speed CAN circuit 1

i84

26

Low-speed CAN circuit 2

B280

26

Between B25 — B26

Serial communication

At communicating 

(sending and receiving)

(Model with auto A/C)

Low-speed CAN circuit 2

B280

25

Immobilizer antenna

B281

20 — 21

Serial communication

 — 

Immobilizer communica-
tion (main)

B280

18

(Back-up 

28)

Serial communication

 — 

Subaru Select Monitor 
communication

B280

19

Serial communication

 — 

Description

Connector 

No.

Terminal 

No.

Signal (V)

Note

Ignition switch ON

(engine OFF)

LAN(diag)-12

Subaru Select Monitor

LAN SYSTEM (DIAGNOSTICS)

6. Subaru Select Monitor

A: OPERATION

1. READ DIAGNOSTIC TROUBLE CODE 
(DTC)

NOTE:
• DTC is displayed in the sequence of inputting.
(When entering two DTCs or more simultaneously,
they are displayed in the sequence of priority.)
• When more than one DTC is displayed, perform
the diagnosis of top one.
1) Prepare the Subaru Select Monitor kit.
2) Connect the diagnosis cable to Subaru Select
Monitor.
3) Connect the Subaru Select Monitor to data link
connector.
Data link connector is located in the lower portion of
instrument panel (on the driver’s side).

CAUTION:
Do not connect scan tools other than the Suba-
ru Select Monitor.
4) Turn the ignition switch to ON (engine OFF) and
run the Subaru Select Monitor.
5) On the «Main Menu» display, select the {Each
System Check}.
6) On the «System Selection Menu» display, select
the {Integ. unit mode}.
7) On the «Integ. unit mode failure diag» display,
select the {Diagnostic Code(s) Display}.

NOTE:
• For details concerning the operation procedure,
refer to the “PC application help for Subaru Select
Monitor”.
• For details concerning DTCs, refer to the List of
Diagnostic Trouble Code (DTC). <Ref. to LAN(di-
ag)-31, List of Diagnostic Trouble Code (DTC).>

2. READ CURRENT DATA

1) On the «Main Menu» display screen, select the
{Each System Check}.
2) On the «System Selection Menu» display
screen, select the {Integ. Unit mode}.
3) On the «Integ. Unit mode failure diag» display
screen, select the {Current Data Display & Save}.
4) On the «Current Data Display & Save» display
screen, select the {Data Display}.
5) Using the scroll key, scroll the display screen up
or down until the desired data is shown.
A support list contains both of analog and digital
data, and they are shown in the following table.

LAN00110

LAN(diag)-13

Subaru Select Monitor

LAN SYSTEM (DIAGNOSTICS)

3. DISPLAY OF ANALOG DATA

Items to be displayed

Unit of measure

Description

Note

BATT voltage (control)

10 — 15 V

Body integrated unit input value

Always

BATT voltage (BACKUP)

10 — 15 V

Body integrated unit input value

Always

IG power supply voltage

10 — 15 V

Body integrated unit input value

Ignition switch ON

ACC voltage

10 — 15 V

Body integrated unit input value

Ignition switch ACC

Illumination VR Voltage

0 — 5 V

Body integrated unit output 

value

Illumination volume input value

Illumi. output d-ratio

0 — 100%

Body integrated unit input value

Small light ON

Illumination volume is other than bright.

Ambient temp sensor V

0 — 5 V

Body integrated unit output 

value

Ignition switch ON

Ambient Temperature

–40 — 87.5°C

Body integrated unit output 

value

Ignition switch ON

Fuel level voltage

0 — 8 V

Body integrated unit input value

Ignition switch ON

Fuel level resistance

0 — 102.3 

:

Body integrated unit input value

Ignition switch ON

key-lock solenoid V

6 — 12 V

Body integrated unit output 

value

Other than parking range

Key warning switch ON

number of regist.

0 — 4

Key No. to register

 

Front Wheel Speed

km/h

CAN data input value

Reception from VDC module

VDC/ABS latest f-code

DTC display 

(Temporarily)

CAN data input value

It is normal when DTC is not been input 

even if this code is displayed.

Reception from VDC

Blower Fan Steps

0 — 2 levels

CAN data input value

0: OFF, 1: Low, 2: 2 levels or more

Reception from air conditioner ECM 

(AUTO A/C model)

Fuel level resistance 2

0 — 102.3 

:

CAN data output value

Reception from body integrated unit

Fuel consumption

cc/s

CAN data input value

Reception from ECM and transmission 

to center monitor

Coolant Temp.

–40 — 130°C

CAN data input value

Reception from ECM

Vehicle longitudinal G

m/s

2

CAN data input value

Reception from VDC unit

SPORT Shift Stages

0 — 7 levels

CAN data input value

(0: Light OFF; 1 — 5: Gear display; 6: 

Fail; 7: ATF temperature High/Low)

Reception from TCM (AT model)

Shift Position

0 — 7 levels

CAN data input value

0: 1; 1: 2; 2: 3; 3: 4; 4: D; 5: N; 6: R; 7: 

P shift position (8 indicates no input)

Reception from TCM (AT model)

Off delay time

OFF, Short, Normal, 

Long

Body integrated unit setting 

items

Customize setting