Vehicle Stability Control System (For Hydraulic Brake Booster) Multi-Terrain Select Indicator Light Does Not Come On


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK CAN COMMUNICATION LINE

CHECK LIN COMMUNICATION LINE

CHECK DTC

READ VALUE USING GTS (OFF-ROAD GUIDANCE SWITCH AND DIAL SWITCH SIGNAL)

INSPECT COMBINATION METER ASSEMBLY

CHECK HARNESS AND CONNECTOR (CENTER CLUSTER MODULE SWITCH - DRIVING SUPPORT SWITCH CONTROL ECU)

INSPECT CENTER CLUSTER MODULE SWITCH

VEHICLE STABILITY CONTROL SYSTEM (for Hydraulic Brake Booster) - Multi-terrain Select Indicator Light does not Come ON


DESCRIPTION

When the multi-terrain select switch (center cluster module switch) is operated, multi-terrain select control is enabled and the multi-terrain select indicator light illuminates.
After selecting a road surface type displayed on the multi-information display using the multi-terrain select road mode selector (center cluster module switch), the system optimizes throttle control and brake fluid pressure control for wheels that slip when accelerating, which allows the power lost when wheels slip during acceleration to be distributed to all 4 wheels.
The slip indicator light blinks while the system is operating.
The system can operate under the following conditions:
  1. The vehicle stability control system is normal.
  2. The system is not in VSC OFF mode or TRC OFF mode.
  3. Crawl control is not operating.
  4. Shift position not P or N.
  5. The transfer is set to L4.
When there is a malfunction in the multi-terrain select system, a message is displayed on the multi-information display.
A mode screen display signal is sent to the combination meter assembly via LIN communication from the driving support switch control ECU to display the multi-terrain select road mode on the multi-information display.

WIRING DIAGRAM


Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Brake Control Dynamic Control Systems.Anti-Lock Brake System.Vehicle Stability Control System (For Hydraulic Brake Booster) Multi-Terrain Select Indicator Light Does Not Come On


INSPECTION PROCEDURE

NOTICE:
When replacing the skid control ECU (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 TROUBLESHOOT ECU CONTROLLED SYSTEMS) (LandCruiser RM000001RSO0C5X.html)

C
GO TO CAN COMMUNICATION SYSTEM (HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS) (LandCruiser RM000001RSO0BZX.html)
A


2.CHECK LIN COMMUNICATION LINE

  1. Use the GTS to check if the LIN communication system is functioning normally.

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


B
GO TO LIN COMMUNICATION SYSTEM (HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS) (LandCruiser RM000001RSO0BWX.html)
A


3.CHECK DTC

  1. Check for DTCs (LandCruiser RM0000046KV016X.html).

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


B
REPAIR CIRCUITS INDICATED BY OUTPUT DTCS (LandCruiser RM0000045Z601DX.html)
A


4.READ VALUE USING GTS (OFF-ROAD GUIDANCE SWITCH AND DIAL SWITCH SIGNAL)

  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: Body Electrical / D-SEAT SW / Data List.

  1. Check the Data List for proper functioning of the multi-terrain select switch (center cluster module switch) and multi-terrain select road mode selector (center cluster module switch).

    D-SEAT SW
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    Off-road Guidance Switch
    		Multi-terrain select switch/ ON or OFF
    		ON: Switch on
    OFF: Switch off
    		-
    Dial Switch Signal 1
    		Crawl speed selector/Multi-terrain select road mode selector signal 1/ ON or OFF
    		Switches between ON and OFF according to the ON/OFF Combination Chart (LandCruiser RM00000452G01FX_04_0009.html)
    		-
    Dial Switch Signal 2
    		Crawl speed selector/Multi-terrain select road mode selector signal 2/ ON or OFF
    		-
    Dial Switch Signal 3
    		Crawl speed selector/Multi-terrain select road mode selector signal 3/ ON or OFF
    		-
    OK:
    The GTS display changes according to multi-terrain select switch (center cluster module switch) and multi-terrain select road mode selector (center cluster module switch) operation.


NG
Go to step 6
OK


5.INSPECT COMBINATION METER ASSEMBLY

  1. Perform an Active Test of the combination meter assembly using the GTS (LandCruiser RM0000012G70JTX.html).

    OK:
    The multi-terrain select indicator light turns on or off in accordance with the Active Test operation.
    Result
    Result
    		Proceed to
    NG
    		A
    OK (for LHD)
    		B
    OK (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)

6.CHECK HARNESS AND CONNECTOR (CENTER CLUSTER MODULE SWITCH - DRIVING SUPPORT SWITCH CONTROL ECU)

  1. Disconnect the G156 center cluster module switch connector.

  1. Disconnect the G162 driving support switch control ECU connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    G162-8 (MTS) - G156-20 (FRE)
    		Always
    		Below 1 Ω
    G162-4 (MOD1) - G156-17 (ECU)
    		Always
    		Below 1 Ω
    G162-11 (MOD3) - G156-19 (DN)
    		Always
    		Below 1 Ω
    G162-2 (MOD2) - G156-18 (UP)
    		Always
    		Below 1 Ω
    G156-24 (E) - Body ground
    		Always
    		Below 1 Ω
    G162-8 (MTS) or G156-20 (FRE) - Body ground
    		Always
    		10 kΩ or higher
    G162-4 (MOD1) or G156-17 (ECU) - Body ground
    		Always
    		10 kΩ or higher
    G162-11 (MOD3) or G156-19 (DN) - Body ground
    		Always
    		10 kΩ or higher
    G162-2 (MOD2) or G156-18 (UP) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


7.INSPECT CENTER CLUSTER MODULE SWITCH

  1. Remove the center cluster module switch (LandCruiser RM000005L2H001X.html).

  1. Inspect the multi-terrain select switch (center cluster module switch) and multi-terrain select road mode selector (center cluster module switch) (LandCruiser RM000005L2F001X.html).



NG
REPLACE CENTER CLUSTER MODULE SWITCH (LandCruiser RM000005L2H001X.html)
OK

REPLACE DRIVING SUPPORT SWITCH CONTROL ECU (LandCruiser RM00000466X024X.html)