Vehicle Stability Control System (For Hydraulic Brake Booster) Trc Off Indicator Light Does Not Come On


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK CAN COMMUNICATION LINE

INSPECT VSC OFF SWITCH

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

READ VALUE USING INTELLIGENT TESTER (TRC/VSC OFF MODE)

VEHICLE STABILITY CONTROL SYSTEM (for Hydraulic Brake Booster) - TRC OFF Indicator Light does not Come ON


DESCRIPTION

Refer to TRC OFF Indicator Light Remains ON (LandCruiser RM000004522022X_05.html)

WIRING DIAGRAM

Refer to TRC OFF Indicator Light Remains ON (LandCruiser RM000004522022X_06.html)

INSPECTION PROCEDURE

NOTICE:
When replacing the master cylinder solenoid, perform calibration (LandCruiser RM00000452J00ZX.html).
1.CHECK CAN COMMUNICATION LINE

  1. Turn the ignition switch off.

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to ON.

  1. Turn the intelligent tester on.

  1. Select CAN Bus Check from the System Selection Menu screen and follow the prompts on the screen to inspect the CAN bus (for LHD: LandCruiser RM000000WIB0ECX.html, for RHD: LandCruiser RM000000WIB0EEX.html).

    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) (LandCruiser RM000001RSO0C5X.html)

C
GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) (LandCruiser RM000001RSO0BZX.html)
A


2.INSPECT VSC OFF SWITCH

  1. Remove the VSC OFF switch (LandCruiser RM000001WZ2051X.html).



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

    Standard Resistance:
    Tester Connection
    		Switch Condition
    		Specified Condition
    6 - 3
    		Switch is not pushed
    		10 kΩ or higher
    Switch is pushed
    		Below 1 Ω
    Text in Illustration
    *a
    		Component without harness connected
    (VSC OFF Switch)
    Result
    Result
    		Proceed to
    NG
    		A
    OK (for LHD)
    		B
    OK (for RHD)
    		C


NG
REPLACE VSC OFF SWITCH (LandCruiser RM000001WZ2051X.html)
OK


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

  1. Disconnect the A7 skid control ECU (master cylinder solenoid) connector.

  1. Disconnect the G9 VSC OFF switch connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    A7-9 (CSW) - G9-6
    		Always
    		Below 1 Ω
    A7-9 (CSW) - Body ground
    		Always
    		10 kΩ or higher
    G9-3 - Body ground
    		Always
    		Below 1 Ω


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


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

  1. Turn the ignition switch off.

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to ON.

  1. Turn the intelligent tester 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 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.
    Result
    Result
    		Proceed to
    OK
    		A
    NG (for LHD)
    		B
    NG (for RHD)
    		C


B
REPLACE MASTER CYLINDER SOLENOID (LandCruiser RM00000171U02DX.html)

C
REPLACE MASTER CYLINDER SOLENOID (LandCruiser RM00000171U02EX.html)
A

GO TO METER / GAUGE SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) (LandCruiser RM000002Z4L055X.html)