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Last Modified: 11-27-2007 1.6 J
Service Category: Brake Section: Brake Control/Dynamic Control System
Model Year: 2008 Model: LX570 Doc ID: RM000001DXL00PX
Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: DESCRIPTION (2008 LX570)

ABS Warning Light does not Come ON

DESCRIPTION

If any of the following is detected, the ABS warning light remains on.

  • The skid control ECU connectors are disconnected from the skid control ECU.
  • There is a malfunction in the skid control ECU internal circuit.
  • There is an open in the harness between the combination meter and skid control ECU.

HINT:

There is a case that the Techstream cannot be used when the skid control ECU is abnormal.

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:

When replacing the master cylinder solenoid, perform zero point calibration BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: CALIBRATION (2008 LX570) .

PROCEDURE

1.

INSPECT ABS WARNING LIGHT

(a) Disconnect the skid control ECU connector.

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

(c) Check that the ABS warning light comes on.

OK:

ABS warning light comes on.

OK

2.

CHECK CAN COMMUNICATION LINE

(a) Turn the engine switch off.

(b) Connect the Techstream to the DLC3.

(c) Turn the engine switch on (IG) and the Techstream on.

(d) Select "CAN Bus Check" from the System Selection Menu screen, and follow the prompts on the screen to inspect the CAN Bus.

OK:

"CAN Bus Check" indicates no malfunctions in CAN communication.

OK

3.

CHECK DTC (for CAN Communication System)

(a) Turn the engine switch off.

(b) Connect the Techstream to the DLC3.

(c) Turn the engine switch on (IG) and the Techstream on.

(d) Check for DTCs NETWORKING: CAN COMMUNICATION SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING (2008 LX570) .

Result

Result

Proceed to

CAN system DTC is not output.

A

CAN system DTC is output.

B
A

4.

CHECK OPERATION OF ABS WARNING LIGHT (ACTIVE TEST)

(a) Turn the engine switch off.

(b) Connect the Techstream to the DLC3.

(c) Turn the engine switch on (IG) and the Techstream on.

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

(e) Check the condition of the ABS warning light by operating the Techstream.

Combination Meter

Tester Display

Test Part

Control Range

Diagnostic Note

Indicat. Lamp ABS

ABS Warning Light

Warning light ON/OFF

-

OK:

The warning light turns on when operating the Techstream.

OK