Last Modified: 01-30-2024 6.11:8.1.0 Doc ID: RM100000001EACH
Model Year Start: 2019 Model: RAV4 Prod Date Range: [11/2018 - 02/2019]
Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/o Vacuum Brake Booster): Brake Control Warning Light does not Come ON; 2019 MY RAV4 RAV4 HV [11/2018 - 02/2019]

Brake Control Warning Light does not Come ON

DESCRIPTION

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

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 2019 MY RAV4 RAV4 HV [11/2018 - 02/2019]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/o Vacuum Brake Booster): UTILITY

PROCEDURE

1.

PERFORM ACTIVE TEST USING TECHSTREAM (BRAKE WARNING LIGHT / YELLOW (MINOR MALFUNCTION))

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Select the Active Test on the Techstream.

Click here 2019 MY RAV4 RAV4 HV [11/2018 - 02/2019]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/o Vacuum Brake Booster): DATA LIST / ACTIVE TEST

Chassis > ABS/VSC/TRAC > Active Test

Tester Display

Measurement Item

Control Range

Diagnostic Note

ECB Warning Light

Brake warning light / yellow (minor malfunction)

Warning light ON/OFF

  • Observe combination meter assembly
  • ECB: Electronically Controlled Brake System

(d) Select the Data List on the Techstream.

Click here 2019 MY RAV4 RAV4 HV [11/2018 - 02/2019]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/o Vacuum Brake Booster): DATA LIST / ACTIVE TEST

Chassis > ABS/VSC/TRAC > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

ECB Warning Light

Brake warning light / yellow (minor malfunction)

ON or OFF

ON: Warning light on

OFF: Warning light off

ECB: Electronically Controlled Brake System

Chassis > ABS/VSC/TRAC > Active Test

Active Test Display

ECB Warning Light

Data List Display

ECB Warning Light

(e) Check the operating condition of the brake warning light / yellow (minor malfunction) when operating it using the Techstream.

Result

Proceed to

Brake warning light / yellow (minor malfunction) in the Data List does not change using the Active Test.

A

Brake warning light / yellow (minor malfunction) in the Data List turns ON/OFF using the Active Test.

B

A

REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY

B

2.

INSPECT COMBINATION METER ASSEMBLY

(a) Turn the power switch off.

(b) Perform the Active Test of the combination meter assembly (meter CPU) using the Techstream.

Click here 2019 - 2020 MY RAV4 RAV4 HV [11/2018 - 08/2020]; METER / GAUGE / DISPLAY: METER / GAUGE SYSTEM: DATA LIST / ACTIVE TEST

Body Electrical > Combination Meter > Active Test

Tester Display

ECB Warning

(c) Check the combination meter assembly.

OK:

The brake warning light / yellow (minor malfunction) turns on or off in accordance with the Techstream operation.

OK

REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY

NG

INSPECT METER / GAUGE SYSTEM