Toyota Camry owners & service manuals

Toyota Camry (XV70): Terminals Of Ecu

TERMINALS OF ECU

TERMINALS OF ECU

*a

Component without harness connected

(Skid Control ECU (Brake Actuator Assembly))

-

-

HINT:

  • As a waterproof connector is used for the brake actuator assembly, voltage and waveform inspections cannot be performed with the connector connected.
  • Use the Techstream to read data and perform Active Tests when inspecting the operation and communication status of the brake actuator assembly.

    Click here

Terminal No. (Symbol)

Terminal Description

1 (+BM)

ABS motor relay power supply

2 (SP1)

Speed signal output

3 (STPO)

Stop light control relay (stop light switch assembly) output

4 (FR-)

Front wheel speed RH (-) signal input

5

-

6

-

7

-

8 (FL-)

Front wheel speed LH (-) signal input

9 (STP)

Stop light switch assembly signal input

10

-

11

-

12

-

13 (GND2)

Pump motor ground

14 (CANL)

CAN communication line L

15

-

16 (FR+)

Front wheel speed RH (+) power supply output

17 (RR+)

Rear wheel speed RH (+) power supply output

18 (RL-)

Rear wheel speed LH (-) signal input

19 (FL+)

Front wheel speed LH (+) power supply output

20

-

21

-

22 (CSW)

VSC OFF switch input

23

-

24 (STP2)

Stop light signal input

25 (+BS)

ABS solenoid relay power supply

26 (CANH)

CAN communication line H

27

-

28 (IG1)

IG1 power source input

29 (RR-)

Rear wheel speed RH (-) signal input

30

-

31 (RL+)

Rear wheel speed LH (+) power supply output

32

-

33

-

34

-

35

-

36

-

37

-

38 (GND1)

Skid control ECU (brake actuator assembly) ground

TERMINAL INSPECTION

(a) Disconnect the A33 skid control ECU (brake actuator assembly) 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))

-

-

(b) Measure the voltage or resistance according to the value(s) in the table below.

Standard

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

A33-1 (+BM) - Body ground

B - Body ground

ABS motor relay power supply

Always

11 to 14 V

A33-3 (STPO) - Body ground

L - Body ground

Stop light control relay (stop light switch assembly) output

Always

11 to 14 V

A33-9 (STP) - Body ground

GR - Body ground

Stop light switch assembly signal input

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

11 to 14 V → 1.5 V or less

A33-13 (GND2) - Body ground

W-B - Body ground

Pump motor ground

1 minute or more after disconnecting the cable from the negative (-) battery terminal

Below 1 Ω

A33-22 (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

A33-24 (STP2) - Body ground

R - Body ground

Stop light signal input

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

11 to 14 V → 1.5 V or less

A33-25 (+BS) - Body ground

L - Body ground

ABS solenoid relay power supply

Always

11 to 14 V

A33-28 (IG1) - Body ground

B - Body ground

IG1 power source input

Ignition switch ON

11 to 14 V

A33-38 (GND1) - Body ground

W-B - Body ground

Skid control ECU (brake actuator assembly) ground

1 minute or more after disconnecting the cable from the negative (-) battery terminal

Below 1 Ω

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