Fig 1: Control Module I/O Signal - Connector Terminal

Courtesy of SUBARU OF AMERICA, INC.

Terminal No.

Content

Measuring condition

Standard

(B280) No. 1 ↔ Chassis ground

GND

Always

Less than 1.5 V

(B280) No. 2 ↔ Chassis ground

Front wiper return

When front wiper is reversed

Less than 1 V → 9 V or more

(B280) No. 3 ↔ Chassis ground

Lighting relay power supply (redundant circuit)

ACC or key-in switch ON

10 - 13 V

(B280) No. 4 ↔ Chassis ground

ACC input

ACC ON (model with the keyless access with push button start system)

Less than 1.5 V → 10 - 13 V

(B280) No. 4 ↔ Chassis ground

Key-in switch

When key is inserted (model without the keyless access with push button start system)

Less than 1.5 V → 10 - 13 V

(B280) No. 5

(B280) No. 6

(B280) No. 7

(B280) No. 8

(B280) No. 9

(B280) No. 10 ↔ Chassis ground

Stop light SW

Stop light switch OFF → ON

Less than 1.5 V → 8 V or more

(B280) No. 11 ↔ Chassis ground

Impact sensor

Apply an impact

8 V or more

(B280) No. 12

(B280) No. 13

(B280) No. 14

(B280) No. 15 ↔ Chassis ground

Front fog light output

Front fog light switch at ON position

9 V or more → less than 1.0 V

(B280) No. 16 ↔ Chassis ground

Lighting relay I output

Lighting I switch at ON position

9 V or more → less than 1.0 V

(B280) No. 17 ↔ Chassis ground

Lighting Hi relay output

Dimmer switch at Hi position

9 V or more → less than 1.0 V

(B280) No. 18

(B280) No. 19 ↔ Chassis ground

Illumination sensor signal

Ignition switch OFF → ON

0.2 - 4.5 V

(B280) No. 20 ↔ Chassis ground

Answer-back buzzer output

When answer-back operates

Less than 1.0 V → 9 V or more

(B280) No. 21

Security UART

(Models without the keyless access with push button start system)

Serial communication

(B280) No. 22

(B280) No. 23

(B280) No. 24 ↔ Chassis ground

Security horn output

When security is operating

8 V or more → less than 1.0 V

(B280) No. 25 ↔ Chassis ground

Key ring illumination

Illumination ON (models without the keyless access with push button start system)

Pulse output

(B280) No. 26 ↔ Chassis ground

Rear defogger relay output

Rear defogger switch ON

9 V or more → less than 1.0 V

(B280) No. 27 ↔ Chassis ground

Lighting Lo relay output (redundant circuit)

Lighting II switch at ON position

9 V or more → less than 1.0 V

(B280) No. 28

(B280) No. 29 Illumination sensor

GND

(B280) No. 30

(B280) No. 31 ↔ Chassis ground

ECM immobilizer communication

Communicating with ECM (model without keyless access with push button start system)

Serial communication

(B280) No. 32 ↔ Chassis ground

ACC power supply

ACC ON

Less than 1.5 V → 10 - 13 V

(B280) No. 33

(B280) No. 34 ↔ Chassis ground

Lighting II switch (redundant circuit)

Switch at II position

8 V or more → less than 1.5 V

(B281) No. 1 ↔ (B280) No. 29

Illumination sensor power supply

Ignition switch OFF → ON

Less than 1.5 V → 4.5 V or more

(B281) No. 2 ↔ (B281) No. 30

Immobilizer antenna amplifier power supply

Communicating with ignition key (model without keyless access with push button start system)

4.5 V - 5.5 V

(B281) No. 3 ↔ Chassis ground

Ignition power supply

Ignition switch ON

Less than 1.5 V → 10 - 13 V

(B281) No. 4 ↔ Chassis ground

Key lock solenoid output

LOCK status is ON (CVT model without the keyless access with push button start system)⁽²⁾

Less than 1.0 V → 9 V or more

(B281) No. 5 ↔ Chassis ground

Shift lock solenoid output

When shift lock is operating (CVT models)

Less than 1.0 V → 9 V or more

(B281) No. 6 ↔ Chassis ground

Battery power supply (shift lock/key lock)

Always (CVT model)

10 - 13 V

(B281) No. 7 ↔ Chassis ground

Battery power supply (back-up)

Always

10 - 13 V

(B281) No. 8

Illumination output

Illumination ON

Pulse output

(B281) No. 9 ↔ Chassis ground

Turn signal RH input/output

When turn signal switch (RH) is operating

9 V or more → less than 1.5 V

(B281) No. 10 ↔ Chassis ground

Immobilizer antenna (A)

Communicating with ignition key (model without keyless access with push button start system)

Serial communication

(B281) No. 11

(B281) No. 12 ↔ Chassis ground

MT reverse switch

Reverse switch ON (MT model)

Less than 1.5 V → 8 V or more

(B281) No. 13

(B281) No. 14

(B281) No. 15 ↔ Chassis ground

Dimmer Hi beam switch

Switch at Hi beam position

8 V or more → less than 1.5 V

(B281) No. 16 ↔ Chassis ground

Lighting AUTO switch

Switch at AUTO position

8 V or more → less than 1.5 V

(B281) No. 17 ↔ Chassis ground

Lighting I switch

Switch at I position

8 V or more → less than 1.5 V

(B281) No. 18 ↔ Chassis ground

P range switch

Shift lever shifted from P range to other than P range

8 V or more → less than 1.5 V

(B281) No. 19 ↔ Chassis ground

Lighting relay power supply (control)

ACC or key-in switch ON

10 - 13 V

(B281) No. 20

Driving system CAN communication circuit 1 (Hi)

Except for sleep status⁽¹⁾

Serial communication

(B281) No. 21 ↔ Chassis ground

Turn signal LH input/output

When turn signal switch (LH) is operating

9 V or more → less than 1.5 V

(B281) No. 22

Immobilizer antenna (B)

Communicating with ignition key (model without keyless access with push button start system)

Serial communication

(B281) No. 23

(B281) No. 24

(B281) No. 25 ↔ Chassis ground

Dimmer passing switch

Switch at passing position

8 V or more → less than 1.5 V

(B281) No. 26 ↔ Chassis ground

Front fog light switch

Front fog light switch ON

8 V or more → less than 1.5 V

(B281) No. 27

(B281) No. 28

Driving system CAN communication circuit 1 (Lo)

Except for sleep status⁽¹⁾

Serial communication

(B281) No. 29

Accessory connector

(B281) No. 30 ↔ Chassisground

Immobilizer antenna amplifier GND

Always (models without the keyless access with push button start system)

Less than 1.5 V

(B281) No. 31 ↔ Chassis ground

GND

Always

Less than 1.5 V

(B281) No. 32

(B281) No. 33

(B281) No. 34 ↔ Chassis ground

Lighting II switch (control)

Switch at II position

8 V or more → less than 1.5 V

(B281) No. 35 ↔ Chassis ground

Lighting Lo relay output (control)

Lighting II switch at ON position

9 V or more → less than 1.0 V

(i84) No. 1 ↔ Chassis ground

GND

Always

Less than 1.5 V

(i84) No. 2

(i84) No. 3 ↔ Chassis ground

Luggage/trunk light output

Luggage/trunk in open state

Pulse output

(i84) No. 4 ↔ Chassis ground

Room light output

Room light ON (doors interlocked)

Pulse output

(i84) No. 5

(i84) No. 6 ↔ Chassis ground

Battery power supply (control)

Always

10 - 13 V

(i84) No. 7

(i84) No. 8

(i84) No. 9 ↔ Chassis ground

Manual switch (LOCK)

Driver's door lock switch ON

8 V or more → less than 1.5 V

(i84) No. 10 ↔ Chassis ground

Opener switch (trunk/rear gate)

Rear gate/trunk opener switch ON

8 V or more → less than 1.5 V

(i84) No. 11

(i84) No. 12 ↔ Chassis ground

Door lock status switch (driver's)

Door in UNLOCK state (models with the keyless access with push button start system)

8 V or more → less than 1.5 V

(i84) No. 13 ↔ Chassis ground

Door switch (passenger's seat)

With passenger's door closed → opened

8 V or more → less than 1.5 V

(i84) No. 14 ↔ Chassis ground

Door switch (driver's seat)

With driver's door closed → opened

8 V or more → less than 1.5 V

(i84) No. 15

(i84) No. 16 ↔ Chassis ground

Illumination output 2

Illumination ON

Pulse output

(i84) No. 17

(i84) No. 18

(i84) No. 19

(i84) No. 20 ↔ Chassis ground

Manual switch (UNLOCK)

Door unlock switch ON

8 V or more → less than 1.5 V

(i84) No. 21 ↔ Chassis ground

Bright switch

When bright (dimmer cancel) function is ON

8 V or more → less than 1.5 V

(i84) No. 22

(i84) No. 23 ↔ Chassis ground

Door lock status switch (passenger's)

Door in UNLOCK state (models with the keyless access with push button start system)

8 V or more → less than 1.5 V

(i84) No. 24 ↔ Chassis ground

Door switch (rear seat LH)

Rear left door closed → open

8 V or more → less than 1.5 V

(i84) No. 25 ↔ Chassis ground

Door switch (rear seat RH)

Rear right door closed → open

8 V or more → less than 1.5 V

(i84) No. 26

(i84) No. 27

Driving system CAN communication circuit 2 (Hi)

Except for sleep status⁽¹⁾

Serial communication

(i84) No. 28

(i84) No. 29

(i84) No. 30

(i84) No. 31

(i84) No. 32 ↔ Chassis ground

Parking brake switch

When parking brake is OFF

Less than 1.5 V → 8 V or more

(i84) No. 33 ↔ Chassis ground

Rear gate/trunk switch

Rear gate/trunk closed → open

8 V or more → less than 1.5 V

(i84) No. 34

(i84) No. 35

Driving system CAN communication circuit 2 (Lo)

Except for sleep status⁽¹⁾

Serial communication

(i171) No. 1 ↔ Chassis ground

Battery power supply (door lock)

Always

10 - 13 V

(i171) No. 2 ↔ Chassis ground

Door lock (all seats LOCK)

When LOCK signal is output

Less than 1.0 V → 9 V or more

(i171) No. 3 ↔ Chassis ground

Door lock (all seats UNLOCK)

When UNLOCK signal is output

Less than 1.0 V → 9 V or more

(i171) No. 4 ↔ Chassis ground

Door lock (driver's seat UNLOCK)

When driver's side door lock is output

Less than 0.5 V → 8 V or more

(i171) No. 5

(i171) No. 6

(i171) No. 7 ↔ Chassis ground

Door lock (rear gate/trunk UNLOCK)

When UNLOCK signal is output

Less than 1.0 V → 9 V or more

(i171) No. 8 ↔ Chassis ground

Map light output

Map light ON (keyless answer-back, etc.)

Pulse output

(i171) No. 9 ↔ Chassis ground

Wiper deicer relay output

Wiper deicer switch ON

9 V or more → less than 1.0 V

(i171) No. 10 ↔ Chassis ground

DRL cancel output

Headlight switch ON or Hi beam ON, passing switch ON

9 V or more → less than 1.0 V

(i171) No. 11 ↔ Chassis ground

Keyless entry/TPMS communication circuit

When door lock/unlock is operated with the keyless transmitter, or when TPMS is operated

Serial communication

(i171) No. 12 ↔ Chassis ground

Illumination switch (Vi1)

While clearance light illuminates

Approx. 5 V

(i171) No. 13

(i171) No. 14 ↔ Chassis ground

SRF OFF SW input

When SRF OFF SW is pressed

8 V or more → less than 1.5 V

(i171) No. 15

(i171) No. 16

(i171) No. 17

(i171) No. 18 ↔ Chassis ground

Turn/hazard output

When answer-back is output

9 V or more → less than 1.0 V

(i171) No. 19

(i171) No. 20 ↔ Chassis ground

SRF relay output (R)

When SRF RH FOG is operating

9 V or more → less than 1.0 V

(i171) No. 21 ↔ Chassis ground

SRF relay output (L)

When SRF LH FOG is operating

9 V or more → less than 1.0 V

(i171) No. 22 ↔ Chassis ground

Illumination switch (Vi2)

While clearance light illuminates

0.5 - 4.8 V

(i171) No. 23

(i171) No. 24

(i171) No. 25

(i171) No. 26 ↔ Chassis ground

Security light

When security light is illuminating

9 V or more → less than 1.0 V

(i171) No. 27

(i171) No. 28 ↔ Chassis ground

Illumination switch (Vi3)

Always

Less than 1.5 V

(i171) No. 29 ↔ Chassis ground

GND

Always

Less than 1.5 V

(i171) No. 30

(i171) No. 31

⁽¹⁾	For CAN sleep state, hold on for approx. one minute with ignition OFF and the doors, trunk, and rear gate all closed.

⁽²⁾	Use an oscilloscope for measurement due to short output time.

Safety Warning

Electrical Specification

Use the Manual With the Right Hardware

When to See a Mechanic