Toyota Corolla Cross Owners & Service Manuals

Toyota Corolla Cross: Terminals Of Ecu

TERMINALS OF ECU

CHECK BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY

(a) Disconnect the A189 electric brake booster (brake booster with master cylinder assembly) connector and measure the voltage or resistance on the wire harness side.

*a

Front view of wire harness connector

(to Electric Brake Booster (Brake Booster with Master Cylinder Assembly))

-

-

HINT:

The voltage cannot be measured with the connector connected to the electric brake booster (brake booster with master cylinder assembly) as the connector is watertight.

Standard:

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

A189-1 (CBKP) - Body ground

Electric brake booster (brake booster with master cylinder assembly) backup power supply input

-

-

A189-2 (CA1H)

CAN communication line 1 (H)

-

-

A189-3

-

-

-

A189-4 (IGR) - Body ground

IGR power source input

Ignition switch ON

11 to 14 V

A189-5 (STP) - Body ground

Stop light switch assembly input

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

11 to 14 V → Below 1.5 V

A189-6 (SKS1)

Relative displacement sensor (brake booster with master cylinder assembly) 1 signal input

-

-

A189-7 (SKS2)

Relative displacement sensor (brake booster with master cylinder assembly) 2 signal input

-

-

A189-8 (CWKP) - Body ground

Brake control power supply assembly operation signal output

Always

11 to 14 V

A189-9 (CA2H)

CAN communication line 2 (H)

-

-

A189-10

-

-

-

A189-11 (+BS) - Body ground

Electric brake booster (Brake booster with master cylinder assembly) power supply input

Always

11 to 14 V

A189-12 (CA1L)

CAN communication line 1 (L)

-

-

A189-13

-

-

-

A189-14

-

-

-

A189-15

-

-

-

A189-16

-

-

-

A189-17 (CTY) - Body ground

Front door courtesy light switch assembly input (for driver side)

Driver door closed → open

11 to 14 V → Below 1.5 V

A189-18 (CA2L)

CAN communication line 2 (L)

-

-

A189-19 (VSK) - Body ground

Relative displacement sensor (brake booster with master cylinder assembly) power supply output

-

-

A189-20

-

-

-

A189-21 (CLIN) - Body ground

Communication line with brake control power supply assembly

-

-

A189-22

-

-

-

A189-23

-

-

-

A189-24

-

-

-

A189-25 (SKG) - Body ground

Relative displacement sensor (brake booster with master cylinder assembly) ground

-

-

A189-26 (GND) - Body ground

Electric brake booster (Brake booster with master cylinder assembly) ground

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

Below 1 Ω

CHECK BRAKE ACTUATOR ASSEMBLY

(a) Disconnect the A151 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:

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

Standard

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

*1: for Instrument Panel Side

*2: for Console Box

A151-1 (+BM) - Body ground

ABS motor relay power supply input

Always

11 to 14 V

A151-2

-

-

-

A151-3

-

-

-

A151-4 (LBL) - Body ground

Brake fluid level warning switch (Brake master cylinder reservoir assembly) input

-

-

A151-5 (CANH)

CAN communication line 1 (H)

-

-

A151-6 (SKS1)

Brake pedal stroke sensor 1 signal input

-

-

A151-7 (FL-)

Front speed sensor LH (-) signal input

-

-

A151-8

-

-

-

A151-9

-

-

-

A151-10

-

-

-

A151-11 (CA2H)

CAN communication line 2 (H)

-

-

A151-12

-

-

-

A151-13

-

-

-

A151-14 (GND2) - Body ground

Skid control ECU (brake actuator assembly) ground 2

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

Below 1 Ω

A151-15

-

-

-

A151-16

-

-

-

A151-17 (VSK)

Brake pedal stroke sensor assembly power supply output

-

-

A151-18

-

-

-

A151-19 (CANL)

CAN communication line 1 (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 2 (L)

-

-

A151-26 (FR-)

Front wheel speed RH (-) signal input

-

-

A151-27 (STPO) - Body ground

Stop light control relay (stop light switch assembly) output

Always

11 to 14 V

A151-28

-

-

-

A151-29 (SKG)

Brake pedal stroke sensor assembly ground

-

-

A151-30 (+BS) - Body ground

ABS solenoid relay power supply

Always

11 to 14 V

A151-31

-

-

-

A151-32

-

-

-

A151-33 (SP1)

Speed sensor signal output for meter

-

-

A151-34

-

-

-

A151-35 (PKB) - Body ground

Electric parking brake switch (Electric parking brake switch assembly) input

Electric parking brake switch (electric parking brake switch assembly) is pushed → released

Below 1 Ω → 10 kΩ or higher

A151-36 (IGR) - Body ground

IGR power source input

Ignition switch ON

11 to 14 V

A151-37 (RR-)

Rear speed sensor RH (-) signal input

-

-

A151-38 (CSW) - Body ground

VSC OFF switch input

VSC OFF switch is pushed → released

Below 1 Ω → 10 kΩ or higher*1

Below 50 Ω → 10 kΩ or higher*2

A151-39 (RL+)

Rear speed sensor LH (+) power supply output

-

-

A151-40

-

-

-

A151-41 (STP) - Body ground

Stop light switch assembly signal input

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

11 to 14 V → Below 1.5 V

A151-42 (SKS2)

Brake pedal stroke sensor 2 signal input

-

-

A151-43 (STP2) - Body ground

Stop light signal input

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

11 to 14 V → Below 1.5 V

A151-44 (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 1 Ω → 10 kΩ or higher

A151-45

-

-

-

A151-46 (GND1) - Body ground

Skid control ECU (brake actuator assembly) ground 1

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

Below 1 Ω

    READ NEXT:

     Diagnosis System

    DIAGNOSIS SYSTEM ABS, VSC, BRAKE HOLD, ELECTRONICALLY CONTROLLED BRAKE SYSTEM DTC (a) If the skid control ECU detects a malfunction, the ABS warning light, brake system warning light (red indicato

     Dtc Check / Clear

    DTC CHECK / CLEAR HINT: DTCs which are stored in the skid control ECU can be displayed on the GTS. The GTS can display the confirmed and permanent DTCs. If a malfunction is detected during

     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

    SEE MORE:

     Removal

    REMOVAL CAUTION / NOTICE / HINT COMPONENTS (REMOVAL) Procedure Part Name Code 1 REAR CENTER SEAT OUTER BELT ASSEMBLY 73350C - - - 2 REAR SEATBACK ASSEMBLY RH - - - Procedure Part Name Code

     On-vehicle Inspection

    ON-VEHICLE INSPECTION CAUTION / NOTICE / HINT CAUTION: When working near the engine room while the engine has started or the power source mode is ignition switch to ON, do not touch the fan and generator V belt or rotating components such as the fan, etc. Touching the fan and generator V

    © 2020-2024 Copyright www.tcorollacross.com