Anti-Lock Brake System Brake Warning Light Remains On

Brake. Land Cruiser. Urj200, 202 Grj200 Vdj200
Brake Control Dynamic Control Systems. Land Cruiser. Urj200, 202 Grj200 Vdj200

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK DTC

CHECK CAN COMMUNICATION LINE

READ VALUE USING GTS (PARKING BRAKE SW)

PERFORM ACTIVE TEST USING GTS (BRAKE WARNING LIGHT)

INSPECT PARKING BRAKE SWITCH

CHECK HARNESS AND CONNECTOR (PARKING BRAKE SWITCH - MAIN BODY ECU)

ANTI-LOCK BRAKE SYSTEM - Brake Warning Light Remains ON


DESCRIPTION

The brake warning light comes on when brake fluid is insufficient, the parking brake is applied or the EBD is defective.

WIRING DIAGRAM


Land Cruiser. Urj200, 202 Grj200 Vdj200.Brake Control Dynamic Control Systems.Anti-Lock Brake System.Anti-Lock Brake System Brake Warning Light Remains On


INSPECTION PROCEDURE

NOTICE:
After replacing the master cylinder solenoid, perform calibration (Click here).
1.CHECK DTC

  1. Check for DTCs (Click here).

    Result
    Result
    		Proceed to
    DTC is not output
    		A
    DTC is output
    		B


B
REPAIR CIRCUITS INDICATED BY OUTPUT DTCS (Click here)
A


2.CHECK CAN COMMUNICATION LINE

  1. Turn the ignition switch off.

  1. Connect the GTS to the DLC3.

  1. Turn the ignition switch to ON.

  1. Turn the GTS on.

  1. 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.

    Result
    Result
    		Proceed to
    OK
    		A
    NG (for LHD)
    		B
    NG (for RHD)
    		C


B
GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) (Click here)

C
GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) (Click here)
A


3.READ VALUE USING GTS (PARKING BRAKE SW)

  1. Turn the ignition switch off.

  1. Connect the GTS to the DLC3.

  1. Turn the ignition switch to ON.

  1. Turn the GTS on.

  1. Enter the following menus: Chassis / ABS/VSC/TRC / Data List.

    ABS/VSC/TRC
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    Parking Brake SW
    		Parking brake switch/ ON or OFF
    		ON: Parking brake applied
    OFF: Parking brake released
    		-

  1. Using the GTS, check the input of the switch operation when the parking brake pedal is operated.

    OK:
    When the parking brake is operated, the display changes as shown above.


NG
Go to step 5
OK


4.PERFORM ACTIVE TEST USING GTS (BRAKE WARNING LIGHT)

  1. Turn the ignition switch off.

  1. Connect the GTS to the DLC3.

  1. Turn the ignition switch to ON.

  1. Turn the GTS on.

  1. Enter the following menus: Chassis / ABS/VSC/TRC / Active Test.

    ABS/VSC/TRC
    Tester Display
    		Test Part
    		Control Range
    		Diagnostic Note
    Brake Warning Light
    		Brake warning light
    		Warning light ON/OFF
    		Observe the combination meter.

  1. When performing the Brake Warning Light Active Test, check Brake Warning Light in the Data.

    ABS/VSC/TRC
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    Brake Warning Light
    		Brake warning light/ ON or OFF
    		ON: Warning light on
    OFF: Warning light off
    		-

    Result
    Result
    		Proceed to
    Data List Display
    		Data List Display when Performing Active Test ON/OFF Operation
    ON
    		Changes between ON and OFF
    		A
    Does not change between ON and OFF (for LHD)
    		B
    Does not change between ON and OFF (for RHD)
    		C
    OFF
    		Changes between ON and OFF
    		A
    Does not change between ON and OFF (for LHD)
    		B
    Does not change between ON and OFF (for RHD)
    		C


B
REPLACE MASTER CYLINDER SOLENOID (Click here)

C
REPLACE MASTER CYLINDER SOLENOID (Click here)
A

GO TO METER / GAUGE SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) (Click here)

5.INSPECT PARKING BRAKE SWITCH

  1. Disconnect the E53 parking brake switch connector.



    Land Cruiser. Urj200, 202 Grj200 Vdj200.Brake Control Dynamic Control Systems.Anti-Lock Brake System.Anti-Lock Brake System Brake Warning Light Remains On

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Switch Condition
    		Specified Condition
    1 - Body ground
    		Parking brake applied
    (Switch pin not pushed in)
    		Below 1 Ω
    Parking brake released
    (Switch pin pushed in)
    		10 kΩ or higher
    Text in Illustration
    *a
    		Component without harness connected
    (Parking Brake Switch)


NG
REPLACE PARKING BRAKE SWITCH ASSEMBLY (Click here)
OK


6.CHECK HARNESS AND CONNECTOR (PARKING BRAKE SWITCH - MAIN BODY ECU)

  1. Disconnect the E53 parking brake switch connector.

  1. Disconnect the 2D main body ECU (cowl side junction block LH).

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:

    Tester Connection
    		Condition
    		Specified Condition
    E53-1 - 2D-22
    		Always
    		Below 1 Ω
    E53-1 - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE MAIN BODY ECU (COWL SIDE JUNCTION BLOCK LH)