Lexus ES manuals

Lexus ES: ABS Warning Light Remains ON

DESCRIPTION

This procedure is for troubleshooting when the ABS warning light remains on but no DTCs are output.

The skid control ECU (brake actuator assembly) controls the ABS warning light in the combination meter assembly via CAN communication.

CAUTION / NOTICE / HINT

NOTICE:

  • After replacing the skid control ECU (brake actuator assembly), perform acceleration sensor zero point calibration and store system information memorization.

    Click here

  • Before performing this procedure, depress the brake pedal and confirm that the stop lights illuminate.

PROCEDURE

1.

CHECK VEHICLE CONTROL HISTORY (ELECTRONICALLY CONTROLLED BRAKE SYSTEM AND ELECTRIC PARKING BRAKE SYSTEM)

(a) Connect the Techstream to the DLC3.

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

(c) Enter the following menus: Chassis / Brake/EPB / Utility / Vehicle Control History (RoB).

(d) Using the Techstream, check for Vehicle Control History.

Click here

Chassis > Brake/EPB > Utility

Tester Display

Vehicle Control History (RoB)

HINT:

If vehicle control history is stored when the electronically controlled brake system and electric parking brake system are suspended, the ABS warning light illuminates.

Result

Proceed to

There is no vehicle control history for when the electronically controlled brake system and electric parking brake system were suspended.

A

There is vehicle control history for when the electronically controlled brake system and/or electric parking brake system were suspended.

B

B

PERFORM TROUBLESHOOTING AND REPAIR REGARDING VEHICLE CONTROL HISTORY

A

2.

INSPECT COMBINATION METER ASSEMBLY

(a) Connect the Techstream to the DLC3.

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

(c) Enter the following menus: Body Electrical / Combination Meter / Active Test.

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

Click here

Body Electrical > Combination Meter > Active Test

Tester Display

ABS Warning

(e) Check the combination meter assembly.

OK:

The ABS warning light turns on or off in accordance with Techstream operation.

OK

REPLACE BRAKE ACTUATOR ASSEMBLY

NG

INSPECT METER / GAUGE SYSTEM

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 Components

COMPONENTS ILLUSTRATION *1 NO. 1 FLOOR UNDER COVER *2 NO. 2 FLOOR UNDER COVER N*m (kgf*cm, ft.*lbf): Specified torque - - ILLUSTRATION *1 NO. 2 FUEL TANK PROTECTOR *2 NO. 1 FUEL TANK PROTECTOR SUB-ASSEMBLY *3 FUEL TANK MAIN TUBE SUB-ASSEMBLY *4 INLET FUEL

 Components

COMPONENTS ILLUSTRATION *1 COURTESY LIGHT ASSEMBLY *2 REAR DOOR ARMREST COVER *3 REAR DOOR INSIDE HANDLE SUB-ASSEMBLY *4 REAR DOOR TRIM BOARD SUB-ASSEMBLY *5 REAR DOOR TRIM UPPER PAD *6 REAR POWER WINDOW REGULATOR SWITCH ASSEMBLY WITH REAR DOOR UPPER ARMREST BASE PANEL

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