Vehicle Stability Control System Trc Off Indicator 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

INSPECT IF SKID CONTROL ECU CONNECTOR IS SECURELY CONNECTED

CHECK CAN COMMUNICATION LINE

CHECK DTC (CAN COMMUNICATION SYSTEM)

READ VALUE USING GTS (TRC/VSC OFF MODE)

INSPECT VSC OFF SWITCH

CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - VSC OFF SWITCH)

VEHICLE STABILITY CONTROL SYSTEM - TRC OFF Indicator Light Remains ON


DESCRIPTION

The TRC OFF indicator light comes on when the VSC OFF switch is operated.

WIRING DIAGRAM


Land Cruiser. Urj200, 202 Grj200 Vdj200.Brake Control Dynamic Control Systems.Anti-Lock Brake System.Vehicle Stability Control System Trc Off Indicator Light Remains On


INSPECTION PROCEDURE

NOTICE:
After replacing the master cylinder solenoid, perform zero point calibration and store the system information (Click here).
1.INSPECT IF SKID CONTROL ECU CONNECTOR IS SECURELY CONNECTED

  1. Check the skid control ECU (master cylinder solenoid) connector connection.

    OK:
    The connector is securely connected.


NG
CONNECT CONNECTOR TO ECU CORRECTLY
OK


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 and 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.CHECK DTC (CAN COMMUNICATION SYSTEM)

  1. Turn the ignition switch off.

  1. Connect the GTS to the DLC3.

  1. Turn the ignition switch to ON and the GTS on.

  1. Check for DTCs (for LHD: Click here, for RHD: Click here).

    Result
    Result
    		Proceed to
    CAN system DTC is not output
    		A
    CAN system DTC is output (for LHD)
    		B
    CAN system DTC is output (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


4.READ VALUE USING GTS (TRC/VSC OFF MODE)

  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
    TRC/VSC Off Mode
    		TRC/VSC off mode/ Normal, TRC OFF, Unknown or VSC OFF
    		Normal: Normal mode
    TRC OFF: TRC OFF mode
    VSC OFF: VSC OFF mode
    		-

  1. Check that the mode display changes according to VSC OFF switch operation.

    OK:
    Display changes according to switch operation.


NG
Go to step 5
OK

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

5.INSPECT VSC OFF SWITCH

  1. Remove the VSC OFF switch (Click here).

  1. Inspect the VSC OFF switch (Click here).



NG
REPLACE VSC OFF SWITCH (Click here)
OK


6.CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - VSC OFF SWITCH)

  1. Turn the ignition switch off.

  1. Disconnect the A24 skid control ECU (master cylinder solenoid) connector.

  1. Disconnect the G13 VSC OFF switch connector.

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

    Standard Resistance:

    Tester Connection
    		Condition
    		Specified Condition
    A24-9 (CSW) - G13-6
    		Always
    		Below 1 Ω
    A24-9 (CSW) - Body ground
    		Always
    		10 kΩ or higher
    G13-3 - Body ground
    		Always
    		Below 1 Ω

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


B
REPLACE MASTER CYLINDER SOLENOID (Click here)

C
REPLACE MASTER CYLINDER SOLENOID (Click here)
A

REPAIR OR REPLACE HARNESS OR CONNECTOR