Toyota CH-R Service 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

- (Not used)

5 (CANH)

CAN communication line H

6 (CSW)

VSC OFF switch input

7 (FL-)

Front wheel speed LH (-) signal input

8

- (Not used)

9

- (Not used)

10 (STPO)

Stop light control relay output

11

- (Not used)

12

-

13

-

14 (GND2)

Pump motor ground

15

-

16

-

17 (FSW+)

Brake pedal load sensing switch input

18

- (Not used)

19 (CANL)

CAN communication line L

20

- (Not used)

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

- (Not used)

26 (FR-)

Front wheel speed RH (-) signal input

27

- (Not used)

28

- (Not used)

29

- (Not used)

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

- (Not used)

39 (RL+)

Rear wheel speed LH (+) signal input

40

- (Not used)

41

- (Not used)

42 (STP)

Stop light control relay input

43 (HZRI)

Brake hold switch input

44 (STP2)

Stop light switch input

45

-

46 (GND1)

Skid control ECU ground

TERMINAL INSPECTION

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

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

A42-1 (+BM) - Body ground

L - Body ground

ABS motor relay power supply

Always

11 to 14 V

A42-6 (CSW) - Body ground

R - Body ground

VSC OFF switch input

VSC OFF switch ON → OFF (Pressed → not pressed)

Below 1 Ω → 10 kΩ or higher

A42-10 (STPO) - Body ground

R - Body ground

Stop light control relay (stop light switch assembly) output

Ignition switch ON

11 to 14 V

A42-14 (GND2) - Body ground

W-B - Body ground

Pump motor ground

Always

Below 1 Ω

A42-17 (FSW+) - Body ground

GR - Body ground

Brake pedal load sensing switch input

Brake pedal load sensing switch OFF → ON (Brake pedal depressed → released)

950 to 1050 Ω → 203 to 223 Ω

A42-30 (+BS) - Body ground

W - Body ground

ABS solenoid relay power supply

Always

11 to 14 V

A42-36 (IG1) - Body ground

B - Body ground

IG1 power source input

Ignition switch ON

11 to 14 V

A42-42 (STP) - Body ground

SB - Body ground

Stop light control relay (stop light switch assembly) output

Stop light switch ON → OFF (Brake pedal depressed → released)

11 to 14 V* → Below 1.5 V

A42-43 (HZRI) - Body ground

B - Body ground

Brake hold switch input

Brake hold switch ON → OFF (Pressed → not pressed)

Below 1 Ω → 10 kΩ or higher

A42-44 (STP2) - Body ground

L - Body ground

Stop light switch input

Stop light switch assembly ON → OFF (Brake pedal depressed → released)

11 to 14 V* → Below 1.5 V

A42-46 (GND1) - Body ground

W-B - Body ground

Skid control ECU ground

Always

Below 1 Ω

HINT:

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

*a

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

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