Last Modified: 05-08-2025 6.11:8.1.0 Doc ID: RM10000000214OI
Model Year Start: 2022 Model: RAV4 Prod Date Range: [12/2021 -           ]
Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/o Vacuum Brake Booster): TERMINALS OF ECU; 2022 - 2025 MY RAV4 RAV4 HV [12/2021 -        ]

TERMINALS OF ECU

CHECK BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY

(a) Disconnect the A104 No. 1 skid control ECU (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 No. 1 Skid Control ECU (Brake Booster with Master Cylinder Assembly))

-

-

HINT:

The voltage cannot be measured with the connector connected to the No. 1 skid control ECU (brake booster with master cylinder assembly) as the connector is watertight.

Standard

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

A104-1 (MRI1) - Body ground

Brake booster with accumulator pump assembly power supply input

Always

11 to 14 V

A104-2 (MGND) - Body ground

Brake booster with accumulator pump assembly ground

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

Below 1 Ω

A104-3 (SKS1)

Brake pedal stroke sensor 1 signal input

-

-

A104-4

-

-

-

A104-5

-

-

-

A104-6

-

-

-

A104-7

-

-

-

A104-8

-

-

-

A104-9

-

-

-

A104-10

-

-

-

A104-11

-

-

-

A104-12 (LBL)

Brake fluid level warning switch (Brake booster with master cylinder assembly) input

-

-

A104-13

-

-

-

A104-14 (+BI1) - Body ground

+BI1 power source input

Always

11 to 14 V

A104-15 (BS) - Body ground

Solenoid power supply input

Always

11 to 14 V

A104-16 (VSK1)

Brake pedal stroke sensor 1 power supply output

-

-

A104-17

-

-

-

A104-18 (SKG1)

Brake pedal stroke sensor 1 ground

-

-

A104-19

-

-

-

A104-20

-

-

-

A104-21

-

-

-

A104-22

-

-

-

A104-23

-

-

-

A104-24

-

-

-

A104-25 (CSW2)

No. 2 skid control ECU (brake actuator assembly) operation signal output

-

-

A104-26

-

-

-

A104-27

-

-

-

A104-28 (GND1) - Body ground

No. 1 skid control ECU (Brake booster with master cylinder assembly) ground

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

Below 1 Ω

A104-29 (M+)

Brake booster with accumulator pump assembly power supply (+)

-

-

A104-30 (M-)

Brake booster with accumulator pump assembly power supply (-)

-

-

A104-31 (IG1) - Body ground

IG1 power source input

Ignition switch ON

11 to 14 V

A104-32

-

-

-

A104-33

-

-

-

A104-34

-

-

-

A104-35 (CA2H)

CAN communication line 2 (H)

-

-

A104-36 (CA2L)

CAN communication line 2 (L)

-

-

A104-37 (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

A104-38 (CA1H)

CAN communication line 1 (H)

-

-

A104-39 (CA1L)

CAN communication line 1 (L)

-

-

A104-40 (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

A104-41

-

-

-

A104-42 (IG2) - Body ground

IG2 power source input

Ignition switch ON

11 to 14 V

CHECK BRAKE ACTUATOR ASSEMBLY

(a) Disconnect the A105 No. 2 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 No. 2 Skid Control ECU (brake actuator assembly))

-

-

HINT:

The voltage cannot be measured with the connector connected to the No. 2 skid control ECU (brake actuator assembly) as the connector is watertight.

Standard

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

A105-1 (GND1) - Body ground

No. 2 skid control ECU (brake actuator assembly) ground

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

Below 1 Ω

A105-2

-

-

-

A105-3

-

-

-

A105-4 (RL-)

Rear skid control sensor LH (-) signal input

-

-

A105-5 (RL+)

Rear skid control sensor LH (+) power supply output

-

-

A105-6 (FR-)

Front speed sensor RH (-) signal input

-

-

A105-7 (FR+)

Front speed sensor RH (+) power supply output

-

-

A105-8

-

-

-

A105-9 (CSW) - Body ground

VSC OFF switch input

VSC OFF switch is pushed → released

Below 1 Ω → 10 kΩ or higher

A105-10 (SKS2)

Brake pedal stroke sensor 2 signal input

-

-

A105-11 (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

A105-12

-

-

-

A105-13

-

-

-

A105-14 (+BS) - Body ground

ABS solenoid relay power supply input

Always

11 to 14 V

A105-15 (IG2) - Body ground

IG2 power source input

Ignition switch ON

11 to 14 V

A105-16 (CA2H)

CAN communication line 2 (H)

-

-

A105-17 (CA2L)

CAN communication line 2 (L)

-

-

A105-18 (SP1)

Speed sensor signal output

-

-

A105-19 (RR-)

Rear skid control sensor RH (-) signal input

-

-

A105-20 (RR+)

Rear skid control sensor RH (+) power supply output

-

-

A105-21 (FL-)

Front speed sensor LH (-) signal input

-

-

A105-22 (FL+)

Front speed sensor LH (+) power supply output

-

-

A105-23

-

-

-

A105-24

-

-

-

A105-25 (VSK2)

Brake pedal stroke sensor 2 power supply output

-

-

A105-26 (SKG2)

Brake pedal stroke sensor 2 ground

-

-

A105-27 (CANH)

CAN communication line (H)

-

-

A105-28

-

-

-

A105-29 (CTY) - Body ground

No. 2 Skid control ECU (brake actuator assembly) operation signal input

Ignition switch ON

11 to 14 V

A105-30 (GND2) - Body ground

ABS motor ground

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

Below 1 Ω

A105-31

-

-

-

A105-32 (STPO) - Body ground

Stop light control relay (Stop light switch assembly) output

Always

11 to 14 V

A105-33

-

-

-

A105-34

-

-

-

A105-35 (BH) - Body ground

Brake hold switch (integration control and panel assembly) input

Brake hold switch (integration control and panel assembly) is pushed → released

Below 1 Ω → 10 kΩ or higher

A105-36

-

-

-

A105-37 (STP2) - Body ground

Stop light control relay (Stop light switch assembly) input

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

11 to 14 V → Below 1.5 V

A105-38

-

-

-

A105-39

-

-

-

A105-40

-

-

-

A105-41

-

-

-

A105-42

-

-

-

A105-43 (CANL)

CAN communication line (L)

-

-

A105-44

-

-

-

A105-45 (IG1) - Body ground

IG1 power source input

Ignition switch ON

11 to 14 V

A105-46 (BM) - Body ground

ABS motor relay power supply input

Always

11 to 14 V