Last Modified: 07-31-2024 6.11:8.1.0 Doc ID: RM10000000260R0
Model Year Start: 2023 Model: GR Corolla Prod Date Range: [09/2022 -           ]
Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model without Electric Parking Brake System TMC Made): TERMINALS OF ECU; 2023 - 2025 MY Corolla Corolla Hatchback GR Corolla [09/2022 -        ]

TERMINALS OF ECU

TERMINAL INSPECTION

(a) Disconnect the A140 skid control ECU (brake actuator assembly) 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 (brake actuator assembly) as the connector is watertight.
  • Use the GTS to read data and perform Active Tests when inspecting the operation and communication status of the brake actuator assembly.

    Click here 2023 - 2025 MY Corolla Corolla Hatchback GR Corolla [09/2022 -        ]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model without Electric Parking Brake System TMC Made): DATA LIST / ACTIVE TEST

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

A140-1 (GND1) - 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

A140-2

-

-

-

A140-3

-

-

-

A140-4 (RL-)

Rear wheel speed LH (-) signal input

-

-

A140-5 (RL+)

Rear wheel speed LH (+) power supply output

-

-

A140-6 (FR-)

Front wheel speed RH (-) signal input

-

-

A140-7 (FR+)

Front wheel speed RH (+) power supply output

-

-

A140-8

-

-

-

A140-9 (CSW) - Body ground

VSC OFF switch (combination switch assembly) input

VSC OFF switch (combination switch assembly) is pushed → released

Below 1 Ω → 10 kΩ or higher

A140-10

-

-

-

A140-11 (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

A140-12

-

-

-

A140-13

-

-

-

A140-14 (+BS) - Body ground

Solenoid relay power supply

Always

11 to 14 V

A140-15

-

-

-

A140-16 (CA2H)

CAN communication line H

-

-

A140-17 (CA2L)

CAN communication line L

-

-

A140-18 (SP1) - Body ground

Speed signal output for speedometer

Ignition switch ON

11 to 14 V

A140-19 (RR-)

Rear wheel speed RH (-) signal input

-

-

A140-20 (RR+)

Rear wheel speed RH (+) power supply output

-

-

A140-21 (FL-)

Front wheel speed LH (-) signal input

-

-

A140-22 (FL+)

Front wheel speed LH (+) power supply output

-

-

A140-23

-

-

-

A140-24

-

-

-

A140-25

-

-

-

A140-26

-

-

-

A140-27 (CANH)

CAN communication line H

-

-

A140-28

-

-

-

A140-29

-

-

-

A140-30 (GND2) - Body ground

Pump motor ground

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

Below 1 Ω

A140-31

-

-

-

A140-32 (STPO) - Body ground

Stop light control relay (stop light switch assembly) output

Ignition switch ON

11 to 14 V

A140-33

-

-

-

A140-34

-

-

-

A140-35

-

-

-

A140-36

-

-

-

A140-37 (STP2) - Body ground

Stop light signal input

Brake pedal depressed → released

8 to 14 V → Below 1.5 V

A140-38

-

-

-

A140-39

-

-

-

A140-40

-

-

-

A140-41

-

-

-

A140-42

-

-

-

A140-43 (CANL)

CAN communication line L

-

-

A140-44

-

-

-

A140-45 (IGR) - Body ground

ECU power supply input

Ignition switch ON

11 to 14 V

A140-46 (BM) - Body ground

Motor relay power supply

Always

11 to 14 V