Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Terminals Of Ecu

*a

Component without harness connected

(Skid Control ECU (Brake Actuator Assembly))

-

-

1 (+BM)

ABS motor relay power supply

2

-

3

-

4

-

5 (CANH)

CAN communication line H

6 (CSW)

VSC OFF switch input

7 (FL-)

Front wheel speed LH (-) signal input

8

-

9

-

10 (STPO)

Stop light control relay (stop light switch assembly) output

11

-

12

-

13

-

14 (GND2)

Pump motor ground

15

-

16

-

17

-

18

-

19 (CANL)

CAN communication line L

20

-

21 (FR+)

Front wheel speed RH (+) signal input

22 (RR+)

Rear wheel speed RH (+) signal input

23 (RL-)

Rear wheel speed LH (-) signal input

24 (FL+)

Front wheel speed LH (+) signal input

25

-

26 (FR-)

Front wheel speed RH (-) signal input

27

-

28

-

29

-

30 (+BS)

ABS solenoid relay power supply

31

-

32

-

33

-

34 (SP1)

Speed signal output for speedometer

35

-

36 (IG1)

IG1 power source input

37 (RR-)

Rear wheel speed RH (-) signal input

38

-

39 (RL+)

Rear wheel speed LH (+) signal input

40

-

41

-

42 (STP)

Stop light switch assembly input

43 (HZRI)

Brake hold switch (electric parking brake switch assembly) input

44 (STP2)

Stop light control relay (stop light switch assembly) input

45

-

46 (GND1)

Skid control ECU (brake actuator assembly) ground

*a

Front view of wire harness connector (to Skid Control ECU (Brake Actuator Assembly))

-

-

A28-1 (+BM) - Body ground

B - Body ground

ABS motor relay power supply

Always

11 to 14 V

A28-6 (CSW) - Body ground

P - Body ground

VSC OFF switch input

VSC OFF switch on → off (Pressed → not pressed)

Below 1 Ω → 10 kΩ or higher

A28-10 (STPO) - Body ground

L - Body ground

Stop light control relay (stop light switch assembly) output

Always

11 to 14 V

A28-14 (GND2) - Body ground

W-B - Body ground

Pump motor ground

Always

Below 1 Ω

A28-30 (+BS) - Body ground

G - Body ground

ABS solenoid relay power supply

Always

11 to 14 V

A28-36 (IG1) - Body ground

B - Body ground

IG1 power source input

Engine switch on (IG)

11 to 14 V

A28-42 (STP) - Body ground

GR - Body ground

Stop light switch assembly input

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

(+BS x 0.85) to 14 V* → Below 1.5 V

A28-43 (HZRI) - Body ground

LG - Body ground

Brake hold switch (electric parking brake switch assembly) input

Brake hold switch (electric parking brake switch assembly) on → off (Pressed → not pressed)

Below 1 Ω → 10 kΩ or higher

A28-44 (STP2) - Body ground

R - Body ground

Stop light control relay (stop light switch assembly) input

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

(+BS x 0.85) to 14 V* → Below 1.5 V

A28-46 (GND1) - Body ground

W-B - Body ground

Skid control ECU (brake actuator assembly) ground

Always

Below 1 Ω