Honda Civic manuals

Subaru Legacy BN/BS (2015-2019) Service Manual: Electrical specification

Terminal No.

Content

Measuring condition

Standard

A1 ←> Chassis ground

Ignition power supply

Ignition switch: ON

Battery voltage

A2

CAN-H (CAN communication line)

Measurement load (digital signal)

A3

CAN-L (CAN communication line)

Measurement load (digital signal)

A4 ←> Chassis ground

Ground

Always

0 V

A5 ←> Chassis ground

Driver’s side seat heater temperature sensor*4

Ignition switch: ON

Varies depending on temperature at seat heater

0 — 5 V

A6 ←> Chassis ground

Mode door actuator position signal

Ignition switch: ON

Mode door FACE position

4 V

Ignition switch: ON

Mode door DEF position

1 V

A7 ←> Chassis ground

Mode servo drive signal (FACE)

When turning towards FACE side: A7 is 12 V, B18 is GND

While operating: 12 V

While not operating: 0 V

A8 ←> Chassis ground

Battery power supply

Always

Battery voltage

A9

A10

A11 ←> Chassis ground

Air mix door actuator drive signal (HOT)*1 or air mix door actuator (driver’s seat) drive signal (HOT)*2

Turning towards HOT side: A11 is 12 V, A21 is GND

While operating: 12 V

While not operating: 0 V

A12 ←> Chassis ground

Each potentiometer and sensor power supply

Ignition switch: ON

5 V

A13

A14 ←> Chassis ground

Passenger’s side seat heater temperature sensor*4

Ignition switch: ON

Varies depending on temperature at seat heater

0 — 5 V

A15 ←> Chassis ground

Rear vent actuator position signal*3

Ignition switch: ON

Air mix door: Maximum cool position

1.8 V

Ignition switch: ON

Air mix door: Maximum hot position

4.1 V

A16 ←> Chassis ground

Air mix door actuator (passenger’s side) position signal*2

Ignition switch: ON

Air mix door: Maximum cool position

4 V

Ignition switch: ON

Air mix door: Maximum hot position

1 V

A17 ←> Chassis ground

Air mix door position signal*1 or air mix door (driver’s side) position signal*2

Ignition switch: ON

Air mix door: Maximum cool position

4 V

Ignition switch: ON

Air mix door: Maximum hot position

1 V

A18 ←> Chassis ground

Mode servo drive signal (DEF)

When turning towards DEF side: A18 is 12 V, A7 is GND

While operating: 12 V

While not operating: 0 V

A19

A20 ←> Chassis ground

ACC power supply

Ignition switch: ACC

Battery voltage

A21 ←> Chassis ground

Air mix door actuator drive signal (COOL)*1 or air mix door actuator (driver’s side) drive signal (COOL)*2

Turning towards COOL side: A21 is 12 V, A11 is GND

While operating: 12 V

While not operating: 0 V

A22 ←> Chassis ground

After-evaporator sensor signal

Ignition switch: ON

Varies depending on temperature after the evaporator

1 — 4.5 V

A23 ←> Chassis ground

In-vehicle sensor signal

Ignition switch: ON

25°C (77°F): Approx. 1.5 V

40°C (104°F): Approx. 1.0 V

A24 ←> Chassis ground

Pressure sensor signal

Ignition switch: ON

0.5 — 4.9 V

A25 ←> Chassis ground

Sunload sensor signal

Ignition switch: ON (0 V: No sunload)

0 — 4.9 V

A26 ←> Chassis ground

Flow sensor signal

Ignition switch: ON

0.3 — 4.7 V

B1 ←> Chassis ground

Driver’s side seat heater control *4

Ignition switch: ON

Seat heater switch: ON

0 V or battery voltage

B2 ←> Chassis ground

Seat heater (driver’s side) GND *4

Always

Less than 0.5 V

B3 ←> Chassis ground

Passenger’s side seat heater control *4

Ignition switch: ON

Seat heater switch: ON

0 V or battery voltage

B4 ←> Chassis ground

Seat heater (passenger’s side) GND *4

Always

Less than 0.5 V

B5 ←> Chassis ground

Blower motor voltage feedback*2

Ignition switch: ON

Blower switch: ON

0.45 — 10 V

B6 ←> Chassis ground

Blower motor control signal*2

Ignition switch: ON

Blower switch: ON

9.05 V

B7 ←> Chassis ground

Intake door actuator drive signal (RECIRC)

Intake door actuator operating on the RECIRC side

0.7 V or less

B8 ←> Chassis ground

Variable compressor solenoid valve

Ignition switch: ON

Blower switch: ON

A/C switch: ON

2 — 12 V

B9

B10

B11

A/C control panel communication

Measurement load (digital signal)

B12

A/C control panel communication

Measurement load (digital signal)

B13 ←> Chassis ground

Heater main relay drive signal*2

Ignition switch: ON

Blower switch: ON

0.7 V or less

B14

B15 ←> Chassis ground

Air mix door actuator (passenger’s side) drive signal (HOT)*2

Turning towards HOT side: B14 is 12 V, B15 is GND

While operating: 12 V

While not operating: 0 V

B16 ←> Chassis ground

Air mix door actuator (passenger’s side) drive signal (COOL)*2

Turning towards COOL side: B15 is 12 V, B14 is GND

While operating: 12 V

While not operating: 0 V

B17 ←> Chassis ground

Intake door actuator drive signal (FRESH)

Intake door actuator operating on the FRESH side

0.7 V or less

B18 ←> Chassis ground

Sensor GND

Always

Less than 0.5 V

B19

B20

B21

B22

B23 ←> Chassis ground

Rear vent actuator drive signal (HOT)*3

Turning towards HOT side: B22 is 12 V, B23 is GND

While operating: 12 V

While not operating: 0 V

B24 ←> Chassis ground

Rear vent actuator drive signal (COOL)*3

Turning towards COOL side: B23 is 12 V, B22 is GND

While operating: 12 V

While not operating: 0 V

*1: Manual A/C

*2: Auto A/C

*3: With rear seat A/C

*4: With seat heater

Wiring diagram
Refer to “Air Conditioning System” in the wiring diagram. Air Conditioning System > WIRING DIAGRAM ...

Diagnostic procedure with diagnostic trouble code (dtc)
...

Other materials:

Installation
1. Install the intake oil control solenoid to the chain cover, and connect the connector to the intake oil control solenoid.NOTE:• Use new O-rings.• Apply engine oil to O-ring.Tightening torque:6.4 N·m (0.7 kgf-m, 4.7 ft-lb)2. Install the air intake duct. (RH side only) Air Intak ...

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