Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Manual — part 775

LAN(diag)-9

Electrical Component Location

LAN SYSTEM (DIAGNOSTICS)

5 door model

4 door model

(1)

LAN00339

LAN00425

(2)

LAN00905

(5)

LAN00909

(5)

LAN00299

(7)

LAN00008

(11)

(8)

LAN00350

LAN(diag)-10

Control Module I/O Signal

LAN SYSTEM (DIAGNOSTICS)

5. Control Module I/O Signal

A: ELECTRICAL SPECIFICATION

Contents

Terminal No.

Standard

Measuring condition

BAT (control)

B6 ←→ chassis ground

9 — 16 V

Always

BAT (backup)

C2 ←→ chassis ground

9 — 16 V

Always

BAT (door lock)

A34 ←→ chassis ground

9 — 16 V

Always

ACC (rear wiper)

D21 ←→ chassis ground

Less than 1.5 V → 9 — 16 V

ACC OFF → ACC ON

Ground

A28 ←→ chassis ground

Less than 1.5 V

Always

Ground

B17 ←→ chassis ground

Less than 1.5 V

Always

Ground

C20 ←→ chassis ground

Less than 1.5 V

Always

Ground

D27 ←→ chassis ground

Less than 1.5 V

Always

Key warning switch

D2 ←→ chassis ground

Less than 1.5 V → 9 — 16 V

With key removed → inserted

ACC

B7 ←→ chassis ground

Less than 1.5 V → 9 — 16 V

ACC OFF → ACC ON

IGN

B1 ←→ chassis ground

Less than 1.5 V → 9 — 16 V

IGN OFF → IGN ON

Stop light switch

B2 ←→ chassis ground

Less than 1.5 V → 8 V or more

With brake pedal released → depressed

Door switch, driver’s
seat

A19 ←→ chassis ground

8 V or more → less than 1.5 V

With driver’s door closed → opened

Door switch, passen-
ger’s seat

A32 ←→ chassis ground

8 V or more → less than 1.5 V

With passenger’s door closed → opened

Door switch, rear RH
seat

A6 ←→ chassis ground

8 V or more → less than 1.5 V

With rear RH seat door closed → opened

Door switch, rear LH
seat

A20 ←→ chassis ground

8 V or more → less than 1.5 V

With rear LH seat door closed → opened

Door switch, trunk/rear
gate

A33 ←→ chassis ground

8 V or more → less than 1.5 V

With trunk or rear gate closed → opened

Rear gate opener but-
ton

C24 ←→ chassis ground

8 V or more → less than 1.5 V

Switch OFF → ON

Manual switch (LOCK)

A15 ←→ chassis ground

8 V or more → less than 1.5 V

Switch OFF → ON

Manual switch
(UNLOCK)

A29 ←→ chassis ground

8 V or more → less than 1.5 V

Switch OFF → ON

Delivery (test) mode
connector

A17 ←→ chassis ground

8 V or more → less than 1.5 V

When delivery (test) mode connector is

connected

Front wiper input RTN

C5 ←→ chassis ground

8 V or more → less than 1.5 V

When front wiper is reversed

Rear wiper switch ON

C18 ←→ chassis ground

8 V or more → less than 1.5 V

Switch OFF → ON

SIDE

A: i84

1

2

3

4

5

6

7

8

9

10

11

12

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

13

B281

C:

B280

B:

B279

D:

1

2

3

4

5

6

7

8

9

10

11

12

14

15

16

17

18

19

20

21

22

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26

13

1

2

3

4

5

6

7

8

9

10

11

12

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15

16

17

18

19

20

21

22

23

24

25

26

27

28

13

1

2

3

4

5

6

7

8

9

10

11

12

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

13

LAN00314

SIDE

SIDE

SIDE

LAN(diag)-11

Control Module I/O Signal

LAN SYSTEM (DIAGNOSTICS)

Rear wiper switch
(INT)

C27 ←→ chassis ground

8 V or more → less than 1.5 V

Switch OFF → ON

Rear wiper switch
washer

C28 ←→ chassis ground

8 V or more → less than 1.5 V

Switch OFF → ON

Lighting I switch

B11 ←→ chassis ground

8 V or more → less than 1.5 V

Switch OFF → ON

Lighting II switch

C8 ←→ chassis ground

8 V or more → less than 1.5 V

Switch OFF → ON

D6 ←→ chassis ground

8 V or more → less than 1.5 V

Key warning switch ON and lighting switch

OFF → ON

Dimmer switch, Hi
beam

B12 ←→ chassis ground

8 V or more → less than 1.5 V

Switch OFF → ON

Dimmer switch, pass-
ing

B22 ←→ chassis ground

8 V or more → less than 1.5 V

Switch OFF → ON

Front fog light switch

B24 ←→ chassis ground

8 V or more → less than 1.5 V

Switch OFF → ON

MT reverse switch

B18 ←→ chassis ground

Less than 1.5 V → 8 V or more

Other than reverse → reverse

Parking brake switch

C15 ←→ chassis ground

8 V or more → less than 1.5 V

With parking brake not operated → oper-

ated

Bright switch

A14 ←→ chassis ground

Less than 1.5 V → 8 V or more

Switch OFF → ON

Illumination (Vi1)

A12 ←→ chassis ground

Approx. 5 V

Always

Illumination (Vi2)

A3 ←→ chassis ground

0.5 V — 5.0 V

Always

Illumination (Vi3)

A26 ←→ chassis ground

Less than 1.5 V

Always

Fuel level sensor

C7 ←→ chassis ground

Approx. 2 — 96 Ω

Ignition ON

Wiper deicer & rear
defogger switch

A16 ←→ chassis ground

8 V or more → less than 1.5 V

Switch OFF → ON

Seat belt switch
(driver’s seat)

C16 ←→ chassis ground

Less than 1.5 V → 8 V or more

With seat belt unbuckled → buckled

Seat belt switch (pas-
senger’s seat)

C26 ←→ chassis ground

Less than 1.5 V → 8 V or more

With seat belt unbuckled → buckled

Impact sensor

B8 ←→ chassis ground

Less than 1.5 V → 8 V or more

When a shock is applied

Rear wiper output ON

D9 ←→ chassis ground

Less than 1 V → 9 V or more

When rear wiper operates

Rear wiper output RTN

D8 ←→ chassis ground

Less than 1 V → 9 V or more

When rear wiper reversed

Door lock output

A7 ←→ A8

Less than 1 V → 9 V or more

During lock output

Door unlock output

A8 ←→ A7

Less than 1 V → 9 V or more

While unlock output

Driver’s side door
unlock output

A23 ←→ A7

Less than 1 V → 9 V or more

While unlock output

Trunk/rear gate
UNLOCK output

A22 ←→ chassis ground

Less than 1 V → 9 V or more

4 door: While trunk UNLOCK output

5 door: While rear gate UNLOCK output

Lighting power supply

C1 ←→ chassis ground

Less than 1 V → 9 V or more

“With back-up fuse inserted, ACC ON or

IGN ON” or

“When key warning switch is ON”

D1 ←→ chassis ground

Clearance light relay
output

D19 ←→ chassis ground

9 V or more → less than 1 V

Small light ON

Lo beam relay output

C3 ←→ chassis ground

9 V or more → less than 1 V

Headlight switch ON

D7 ←→ chassis ground

9 V or more → less than 1 V

Headlight switch ON

Hi beam relay output

D20 ←→ chassis ground

9 V or more → less than 1 V

“Headlight switch ON and Hi beam ON” or

“Passing switch ON”

Front fog light relay
output

D17 ←→ chassis ground

9 V or more → less than 1 V

Headlight switch ON, and front fog light

switch ON

DRL cancel output

D18 ←→ chassis ground

9 V or more → less than 1 V

When Hi beam 100 % illuminates

Room light output

D5

Pulse control

Illumination is adjusted through PWM con-

trol

Key ring illumination
output

C23

Pulse control

Illumination is adjusted through PWM con-

trol

Contents

Terminal No.

Standard

Measuring condition

LAN(diag)-12

Control Module I/O Signal

LAN SYSTEM (DIAGNOSTICS)

B: WIRING DIAGRAM

<Ref. to WI-171, WIRING DIAGRAM, CAN Communication System.>

Illumination output

A2

Pulse control

Illumination is adjusted through PWM con-

trol

Map light output
(model with sunroof)

D4 ←→ chassis ground

Pulse control

Illumination is adjusted through PWM con-

trol

Rear defogger relay
output

D16 ←→ chassis ground

9 V or more → less than 1 V

While rear defogger output

Wiper deicer relay out-
put

D15 ←→ chassis ground

9 V or more → less than 1 V

While wiper deicer output

Seat belt warning light
(passenger’s seat)

A25 ←→ chassis ground

9 V or more → less than 1 V

Indicator go off → illuminate

Buzzer sound output

D24 ←→ chassis ground

Less than 1 V → 9 V or more

Door lock → unlock with keyless entry

system

Turn & hazard output

C22 ←→ chassis ground

9 V or more → less than 1 V

Door lock or unlock with keyless entry sys-

tem

Horn relay output

D29 ←→ chassis ground

9 V or more → less than 1 V

During security alarm operation

Security indicator out-
put

A10 ←→ chassis ground

9 V or more → less than 3 V

While indicator in combination meter

blinks

Immobilizer antenna 1

B26 ←→ B25

–30 — +30 V

While key secret code is verified

Immobilizer antenna 2

B25 ←→ B26

Immobilizer
communication_1

B4

Can not be measured because

of digital communication

Serial communication line

Immobilizer
communication_2

B15

Can not be measured because

of digital communication

Serial communication line

Keyless entry module
communication

A24

Can not be measured because

of digital communication

Serial communication line

SSM communication
(K line)

B20

Can not be measured because

of digital communication

Serial communication line

Body system CAN_Hi

A1 ←→ chassis ground

Can not be measured because

of digital communication

Serial communication line

Body system CAN_Lo

A9 ←→ chassis ground

Can not be measured because

of digital communication

Serial communication line

Driving system
CAN_Hi

B3 ←→ chassis ground

Can not be measured because

of digital communication

Serial communication line

Driving system
CAN_Lo

B9 ←→ chassis ground

Can not be measured because

of digital communication

Serial communication line

Contents

Terminal No.

Standard

Measuring condition