Last Modified: 01-30-2024 6.11:8.1.0 Doc ID: RM100000001EABS
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): ABS Warning Light Remains ON; 2019 MY RAV4 RAV4 HV [11/2018 - 02/2019]

ABS 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 ABS warning light remains on:

  • The skid control ECU (brake booster with master cylinder assembly) connector is disconnected from the brake booster with master cylinder assembly.
  • There is a malfunction in the skid control ECU (brake booster with master cylinder assembly) internal circuit.
  • There is an open in the wire harness between the combination meter assembly and the skid control ECU (brake booster with master cylinder assembly).
  • The ABS control system is defective.

HINT:

In some cases, the Techstream cannot be used when the skid control ECU (brake booster with master cylinder assembly) is malfunctioning.

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.

READ VALUE USING TECHSTREAM (ABS WARNING LIGHT)

(a) Connect the Techstream to the DLC3.

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

(c) 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

ABS Warning Light

ABS warning light

ON or OFF

ON: Warning light on

OFF: Warning light off

-

Chassis > ABS/VSC/TRAC > Data List

Tester Display

ABS Warning Light

(d) Check the Techstream display condition of the ABS warning light.

Result

Proceed to

Display of the Data List remains OFF.

A

Display of the Data List remains ON.

B
A

INSPECT METER / GAUGE SYSTEM

B

REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY