Toyota Corolla Cross Owners & Service Manuals

Toyota Corolla Cross: Terminals Of Ecu

Toyota Corolla Cross (2022-2024) Service Manual / Brake / Brake Control / Dynamic Control Systems / Electronically Controlled Brake System (for Gasoline Model) / Terminals Of Ecu

TERMINALS OF ECU

TERMINAL INSPECTION

(a) Disconnect the A151 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))

-

-

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 GTS to read data and perform Active Tests when inspecting the operation and communication status of the brake actuator assembly.

    Click here

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

Standard

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition
*: w/ Brake Pedal Load Sensing Switch

A151-1 (+BM) - Body ground

ABS motor relay power supply

Always

11 to 14 V

A151-2

-

-

-

A151-3

-

-

-

A151-4 (STP) - 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

A151-5 (CANH)

CAN communication line H

-

-

A151-6

-

-

-

A151-7 (FL-)

Front wheel speed LH (-) signal input

-

-

A151-8

-

-

-

A151-9

-

-

-

A151-10 (FSW+)*

Brake pedal load sensing switch (brake pedal support assembly) input

Brake pedal depressed → released

950 to 1050 Ω → 203 to 223 Ω

A151-11 (CA2H)

CAN communication line H

-

-

A151-12

-

-

-

A151-13

-

-

-

A151-14 (GND2) - Body ground

Pump motor ground

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

Below 1 Ω

A151-15

-

-

-

A151-16

-

-

-

A151-17

-

-

-

A151-18

-

-

-

A151-19 (CANL)

CAN communication line L

-

-

A151-20

-

-

-

A151-21 (FR+)

Front wheel speed RH (+) power supply output

-

-

A151-22 (RR+)

Rear wheel speed RH (+) power supply output

-

-

A151-23 (RL-)

Rear wheel speed LH (-) signal input

-

-

A151-24 (FL+)

Front wheel speed LH (+) power supply output

-

-

A151-25 (CA2L)

CAN communication line L

-

-

A151-26 (FR-)

Front wheel speed RH (-) signal input

-

-

A151-27 (STPO) - Body ground

Stop light signal output

Always

11 to 14 V

A151-28

-

-

-

A151-29

-

-

-

A151-30 (+BS) - Body ground

ABS solenoid relay power supply

Always

11 to 14 V

A151-31

-

-

-

A151-32

-

-

-

A151-33 (SP1)

Speed signal output

-

-

A151-34

-

-

-

A151-35

-

-

-

A151-36 (IGR) - Body ground

IG power source input

Ignition switch ON

11 to 14 V

A151-37 (RR-)

Rear wheel speed RH (-) signal input

-

-

A151-38 (CSW) - Body ground

VSC OFF switch (combination switch assembly) input

VSC OFF switch (combination switch assembly) on → off (Pressed → not pressed)

Below 50 Ω → 10 kΩ or higher

A151-39 (RL+)

Rear wheel speed LH (+) power supply output

-

-

A151-40

-

-

-

A151-41

-

-

-

A151-42 (HZRI) - 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 50 Ω → 10 kΩ or higher

A151-43 (STP2) - 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

A151-44

-

-

-

A151-45

-

-

-

A151-46 (GND1) - Body ground

Skid control ECU (brake actuator assembly) ground

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

Below 1 Ω

    READ NEXT:

     Dtc Check / Clear

    DTC CHECK / CLEAR DTC CHECK (a) Turn the ignition switch off. (b) Connect the GTS to the DLC3. (c) Turn the ignition switch to ON. (d) Turn the GTS on. (e) Read the DTCs following the prompts on

     Freeze Frame Data

    FREEZE FRAME DATA FREEZE FRAME DATA/INFORMATION (a) Using the GTS, check the vehicle condition (ECU, sensor) when the brake system operates or a DTC is output. CHECK FREEZE FRAME DATA AND INFORMA

     Fail-safe Chart

    FAIL-SAFE CHART FAIL-SAFE CHART (a) When the skid control ECU (brake actuator assembly) detects a solenoid valve malfunction or abnormal signal from a sensor, the brake actuator assembly cuts po

    SEE MORE:

     Power Source Mode does not Change to ON (IG and ACC)

    DESCRIPTION When the ignition switch cannot be turned to ACC or ON, interior verification may be abnormal or there may be a malfunction in the ACC relay or IG relay circuit. If interior verification cannot be performed, the certification ECU (smart key ECU assembly) may be malfunctioning or communic

     Light Sensor Circuit Malfunction (B124400)

    DESCRIPTION The automatic light control sensor detects ambient light. The sensor creates an electrical signal based on the amount of light detected, and sends the signal to the main body ECU (multiplex network body ECU). The main body ECU (multiplex network body ECU) turns on or off the headlights a

    © 2020-2024 Copyright www.tcorollacross.com