Toyota Tacoma 2015-2018 Service Manual: Terminals Of Ecu

*a

Component without harness connected

(Skid Control ECU [Brake Actuator Assembly])

-

-

1 (GND2)

Pump motor ground

2

- (Not used)

3 (EXI)*1

4WD detection switch (Transfer shift actuator assembly) input

A.D.D. position switch (Differential motor actuator assembly) signal input

4

- (Not used)

5 (EXI4)*1

L4 detection switch (Transfer shift actuator assembly) input

6

- (Not used)

7 (STP2)*2

Stop light switch assembly input

8

- (Not used)

9

- (Not used)

10 (CANL)

CAN communication line L

11 (EXI3)

Back up light sw input

12 (IG1)

ECU power supply input

13 (BM)

Motor relay power supply

14 (SP1)

Speed signal output for speedometer

15 (RR-)

Rear wheel speed RH (-) signal input

16 (RR+)

Rear wheel speed RH (+) power supply output

17 (FL-)

Front wheel speed LH (-) signal input

18 (FL+)

Front wheel speed LH (+) power supply output

19

- (Not used)

20

- (Not used)

21

- (Not used)

22 (CANH)

CAN communication line H

23

- (Not used)

24 (TS)*3

Sensor check input

25 (GND1)

Skid control ECU (Brake actuator assembly) ground

26 (STPO)*2

STOP Relay output

27 (HDCS)

4WD identification signal input*1

28 (RL-)

Rear wheel speed LH (-) signal input

29 (RL+)

Rear wheel speed LH (+) power supply output

30 (FR-)

Front wheel speed RH (-) signal input

31 (FR+)

Front wheel speed RH (+) power supply output

32

- (Not used)

33 (CSW)

VSC OFF switch input

34

- (Not used)

35 (STP)

STOP Relay input

36

- (Not used)

37

- (Not used)

38 (+BS)

Solenoid relay power supply

*a

Front view of wire harness connector

(to Skid Control ECU [Brake Actuator Assembly])

-

-

S1-1 (GND2) - Body ground

W-B - Body ground

Pump motor ground

Always

Below 1 Ω

S1-3 (EXI) - Body ground*1

LG - Body ground

4WD detection switch (Transfer shift actuator assembly) input

11 to 14 V

A.D.D. position switch (Differential motor actuator assembly) signal input

11 to 14 V

S1-5 (EXI4) - Body ground*1

GR - Body ground

L4 detection switch (Transfer shift actuator assembly) input

11 to 14 V

S1-7 (STP2) - Body ground

L - Body ground

Stop light switch assembly input

Stop light switch assembly on → off (Brake pedal depressed → released)

8 to 14 V → Below 1.5 V

S1-12 (IG1) - Body ground

G - Body ground

ECU power supply input

Ignition switch ON

11 to 14 V

S1-13 (BM) - Body ground

B - Body ground

Motor relay power supply

Always

11 to 14 V

S1-14 (SP1) - Body ground

G - Body ground

Speed signal output for speedometer

Ignition switch ON

11 to 14 V

S1-25 (GND1) - Body ground

W-B - Body ground

Skid control ECU (Brake actuator assembly) ground

Always

Below 1 Ω

S1-26 (STPO) - Body ground

B - Body ground

STOP Relay output

Ignition switch ON

11 to 14 V

S1-33 (CSW) - Body ground

GR - Body ground

VSC OFF switch input

VSC OFF switch pressed and held → released

Below 1 Ω → 10 kΩ or higher

S1-35 (STP) - Body ground

SB - Body ground

STOP Relay input

Stop light switch assembly on → off (Brake pedal depressed → released)

8 to 14 V → Below 1.5 V

S1-38 (+BS) - Body ground

R - Body ground

Solenoid relay power supply

Always

11 to 14 V