Toyota Avalon Service & Repair Manual: Terminals Of Ecu

TERMINALS OF ECU

TERMINALS OF ECU

*a

Component without harness connected

(Skid Control ECU (Brake Actuator Assembly))

-

-

Terminal No. (Symbol)

Terminal Description

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

TERMINAL INSPECTION

(a) Disconnect the connector and measure the voltage and resistance on the wire harness side.

*a

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

-

-

HINT:

The voltage cannot be measured with the connector connected to the skid control ECU (brake actuator assembly) because the connector is watertight.

Standard

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

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

HINT:

*: The minimum voltage value varies depending on the +BS terminal voltage value. The minimum voltage is 85% or more of the +BS terminal voltage.

    System Diagram

    Test Mode Procedure

    See More:

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