BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/o Vacuum Brake Booster): Brake Warning Light Remains ON; 2019 - 2021 MY RAV4 RAV4 HV [02/2019

Last Modified: 01-30-2024	6.11:8.1.0	Doc ID: RM100000001HG9J
Model Year Start: 2019	Model: RAV4	Prod Date Range: [02/2019 - 12/2021]
Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/o Vacuum Brake Booster): Brake Warning Light Remains ON; 2019 - 2021 MY RAV4 RAV4 HV [02/2019 - 12/2021]

Brake Warning Light Remains ON

DESCRIPTION

The skid control ECU (brake booster with master cylinder assembly) is connected to the combination meter assembly via CAN communication.

If any of the following is detected, the brake warning light / red (malfunction) remains on:

The skid control ECU (brake booster with master cylinder assembly) connector is disconnected from the brake booster with master cylinder assembly.
The brake fluid level is insufficient.
EBD operation has been disabled.

CAUTION / NOTICE / HINT

NOTICE:

When replacing the skid control ECU (brake booster with master cylinder assembly), perform initialization and calibration of the linear solenoid valve.

Click here

PROCEDURE

1.	READ VALUE USING TECHSTREAM (BRAKE WARNING LIGHT / RED (MALFUNCTION))

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

Click here

Chassis > ABS/VSC/TRAC > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Brake Warning Light

Brake warning light / red (malfunction)

ON or OFF

ON: Warning light on

OFF: Warning light off

Chassis > ABS/VSC/TRAC > Data List

Tester Display
Brake Warning Light

(d) Check the Techstream display condition of the brake warning light / red (malfunction).

Result	Proceed to
Display of the Data List remains OFF.	A
Display of the Data List remains ON.	B

INSPECT METER / GAUGE SYSTEM

REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY