Toyota Yaris: Vehicle Stability Control System / Terminals Of Ecu

Toyota Yaris XP210 (2020-2022) Reapir and Service Manual / Brake / Brake Control / Dynamic Control Systems / Vehicle Stability Control System / 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 (GND2)

Pump motor ground

2

- (Not used)

3

- (Not used)

4

- (Not used)

5 (STP2)

Stop light switch assembly input

6

- (Not used)

7

- (Not used)

8

- (Not used)

9

- (Not used)

10 (CANL)

CAN communication line L

11

- (Not used)

12 (IGR)

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

- (Not used)

25 (GND1)

Skid control ECU (brake actuator assembly) ground

26 (STPO)

Stop light switch assembly output

27

- (Not used)

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 (combination switch assembly) input

34

- (Not used)

35 (STP)

Stop light switch assembly input

36 (CA2H)

CAN communication line H

37 (CA2L)

CAN communication line L

38 (+BS)

Solenoid relay power supply

TERMINAL INSPECTION

(a) Disconnect the A108 connector and measure the voltage or resistance on the wire harness side.

*a

Front view of wire harness connector

(to Skid Control ECU [Brake Actuator Assembly])

-

-

HINT:

Voltage cannot be measured with the connector connected to the skid control ECU (brake actuator assembly) as the connector is watertight.

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

A108-1 (GND2) - Body ground

Pump motor ground

Always

Below 1 Ω

A108-5 (STP2) - Body ground

Stop light switch assembly input

Brake pedal depressed → released

8 to 14 V → Below 1.5 V

A108-12 (IGR) - Body ground

ECU power supply input

Ignition switch ON

10.5 to 16 V

A108-13 (BM) - Body ground

Motor relay power supply

Always

11 to 14 V

A108-14 (SP1) - Body ground

Speed signal output for speedometer

Ignition switch ON

11 to 14 V

A108-25 (GND1) - Body ground

Skid control ECU (brake actuator assembly) ground

Always

Below 1 Ω

A108-26 (STPO) - Body ground

Stop light switch assembly output

Ignition switch ON

11 to 14 V

A108-33 (CSW) - Body ground

VSC OFF switch (combination switch assembly) input

VSC OFF switch (combination switch assembly) pressed and held → released

Below 1 Ω → 10 kΩ or higher

A108-35 (STP) - 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

A108-38 (+BS) - Body ground

Solenoid relay power supply

Always

11 to 14 V

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