Subaru Crosstrek Service Manual: Control module i/o signal Electrical specification

1

Security indicator

27

Ambient sensor

2

Charge warning light

28

UART (MFD)

3

Oil pressure warning light

29

Steering switch (+)

4

RH turn indicator

30

Pedestrian alert device

6

LH turn indicator

32

CAN communication line (−)

8

Auto headlight beam leveler warning light

33

CAN communication line (+)

15

Driver’s seat belt switch

36

Ambient sensor GND

16

Passenger’s seat belt switch

37

Fuel level sensor GND

20

Ignition power supply

38

GND

21

Washer fluid level sensor

39

Backup ignition power supply

23

Brake fluid level switch

40

Battery power supply

25

Fuel level sensor

—

—

1 ←> Chassis ground

Voltage

Security indicator light off > on

0 V > 10 — 14 V

2 ←> Chassis ground

Voltage

Charge warning light off > on

0 V > 10 — 14 V

3 ←> Chassis ground

Voltage

Oil pressure warning light off > on

0 V > 10 — 14 V

4 ←> Chassis ground

Voltage

RH turn indicator off > on

0 V > 10 — 14 V

6 ←> Chassis ground

Voltage

LH turn indicator off > on

0 V > 10 — 14 V

8 ←> Chassis ground

Voltage

Auto headlight beam leveler warning light off > on

0 V > 10 — 14 V

15 ←> Chassis ground

Resistance

Driver’s seat belt switch ON

Less than 1 ?

16 ←> Chassis ground

Resistance

Passenger’s seat belt switch ON

Less than 1 ?

20 ←> Chassis ground

Voltage

IG OFF > ON

0 V > 10 — 14 V

21 ←> Chassis ground

—

Washer fluid level sensor

—

23 ←> Chassis ground

—

Brake fluid level switch

—

25 ←> 37

Resistance

Fuel level sensor

10 — 600 ?

27 ←> 36

Resistance

Ambient sensor

1 — 35 k?

28 (UART) ←> Chassis ground

—

Cannot be measured

—

32 (CAN−) ←> Chassis ground

—

Cannot be measured

—

33 (CAN+) ←> Chassis ground

—

Cannot be measured

—

34 ←> Chassis ground

Resistance

Always

Less than 1 ?

35 ←> Chassis ground

Resistance

Always

Less than 1 ?

36 ←> Chassis ground

Resistance

Always

Less than 1 ?

37 ←> Chassis ground

Resistance

Always

Less than 1 ?

38 ←> Chassis ground

Resistance

Always

Less than 1 ?

39 ←> Chassis ground

Resistance

Always

Less than 1 ?

40 ←> Chassis ground

Voltage

Always

10 — 14 V

1

Battery power supply

7

—

2

GND

8

—

3

Ignition power supply

9

UART (meter)

4

Switch communication line (−)

10

Passenger’s airbag ON

5

CAN communication line (−)

11

Passenger’s airbag OFF

6

CAN communication line (+)

12

Switch communication line (+)

1 (+B) ←> Chassis ground

Voltage

Always

10 — 14 V

2 (GND) ←> Chassis ground

Resistance

Always

Less than 1 ?

3 (IGN) ←> Chassis ground

Voltage

IG OFF > ON

0 V > 10 — 14 V

4 (STR−) ←> Chassis ground

—

Cannot be measured (switch communication line)

—

5 (CAN−) ←> Chassis ground

—

Cannot be measured (CAN communication line)

—

6 (CAN+) ←> Chassis ground

—

Cannot be measured (CAN communication line)

—

9 (UART) ←> Chassis ground

—

Cannot be measured (meter communication line)

—

10 ←> Chassis ground

Voltage

Passenger’s airbag ON indicator (when illuminating)

Less than 1 V

11 ←> Chassis ground

Voltage

Passenger’s airbag OFF indicator (when illuminating)

Less than 1 V

12 (STR+) ←> Chassis ground

—

Cannot be measured (switch communication line)

—