Vehicle Stability Control System Turn Assist Indicator Light Circuit

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

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK CAN COMMUNICATION LINE

CHECK DTC (CAN COMMUNICATION SYSTEM)

INSPECT SUSPENSION CONTROL SWITCH OR INTEGRATION CONTROL AND PANEL ASSEMBLY

CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - TURN ASSIST FUNCTION SWITCH)

CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU EXI4 CIRCUIT)

CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU EXI4 CIRCUIT)

VEHICLE STABILITY CONTROL SYSTEM - Turn Assist Indicator Light Circuit


DESCRIPTION

When any of the following conditions are met, the turn assist system becomes operable and the turn assist indicator light illuminates.
  1. Crawl Control is operating.
  2. The turn assist function switch (suspension control switch)*1 or turn assist function switch (integration control and panel assembly)*2 is on.
    *1: w/o Entry and Start System
    *2: w/ Entry and Start System
  3. The center differential is "free".
  4. The vehicle is moving at a speed of 10 km/h (6 mph) or less.
  5. The shift lever is not in P, R or N.

WIRING DIAGRAM


Land Cruiser. Urj200, 202 Grj200 Vdj200.Brake Control Dynamic Control Systems.Anti-Lock Brake System.Vehicle Stability Control System Turn Assist Indicator Light Circuit


INSPECTION PROCEDURE

NOTICE:
After replacing the master cylinder solenoid, perform zero point calibration and store the system information (Click here).
1.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 (with Central Gateway ECU))
    		B
    NG (for LHD (without Central Gateway ECU))
    		C
    NG (for RHD (with Central Gateway ECU))
    		D
    NG (for RHD (without Central Gateway ECU))
    		E


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)

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

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


2.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. for LHD (with Central Gateway ECU):
    Check for DTCs (Click here).

  1. for LHD (without Central Gateway ECU):
    Check for DTCs (Click here).

  1. for RHD (with Central Gateway ECU):
    Check for DTCs (Click here).

  1. for RHD (without Central Gateway ECU):
    Check for DTCs (Click here).

    Result
    Result
    		Proceed to
    CAN DTC is not output
    		A
    CAN DTC is output (for LHD (with Central Gateway ECU))
    		B
    CAN DTC is output (for LHD (without Central Gateway ECU))
    		C
    CAN DTC is output (for RHD (with Central Gateway ECU))
    		D
    CAN DTC is output (for RHD (without Central Gateway ECU))
    		E


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)

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

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


3.INSPECT SUSPENSION CONTROL SWITCH OR INTEGRATION CONTROL AND PANEL ASSEMBLY

  1. w/o Entry and Start System:
    Remove the turn assist function switch (suspension control switch) (Click here).

  1. w/ Entry and Start System:
    Remove the turn assist function switch (integration control and panel assembly) (Click here).

  1. w/o Entry and Start System:
    Inspect the turn assist function switch (suspension control switch) (Click here).

  1. w/ Entry and Start System:
    Inspect the turn assist function switch (integration control and panel assembly) (Click here).


Result
Result
Proceed to
OK
A
NG (w/o Entry and Start System)
B
NG (w/ Entry and Start System)
C


B
REPLACE SUSPENSION CONTROL SWITCH (Click here)

C
REPLACE INTEGRATION CONTROL AND PANEL ASSEMBLY (Click here)
A


4.CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - TURN ASSIST FUNCTION SWITCH)

  1. Turn the ignition switch off.

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

  1. Disconnect the V4 turn assist function switch (suspension control switch)*1 or V8 turn assist function switch (integration control and panel assembly)*2 connector.

    1. *1: w/o Entry and Start System
    2. *2: w/ Entry and Start System

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

    Standard Resistance:

    w/o Entry and Start System:
    Tester Connection
    		Condition
    		Specified Condition
    A24-29 (EXI4) - V4-2 (ECU)
    		Always
    		Below 1 Ω
    A24-29 (EXI4) - Body ground
    		Always
    		10 kΩ or higher
    V4-16 (E) - Body ground
    		Always
    		Below 1 Ω

    w/ Entry and Start System:
    Tester Connection
    		Condition
    		Specified Condition
    A24-29 (EXI4) - V8-12 (ECU)
    		Always
    		Below 1 Ω
    A24-29 (EXI4) - Body ground
    		Always
    		10 kΩ or higher
    V8-10 (E) - Body ground
    		Always
    		Below 1 Ω

    Result
    Result
    		Proceed to
    OK (w/o Entry and Start System)
    		A
    OK (w/ Entry and Start System)
    		B
    NG
    		C


B
Go to step 6

C
REPAIR OR REPLACE HARNESS OR CONNECTOR
A


5.CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU EXI4 CIRCUIT)

  1. Turn the ignition switch off.

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



    Land Cruiser. Urj200, 202 Grj200 Vdj200.Brake Control Dynamic Control Systems.Anti-Lock Brake System.Vehicle Stability Control System Turn Assist Indicator Light Circuit

  1. Disconnect the turn assist function switch (suspension control switch) connector.

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    V4-2 (ECU) - Body ground
    		Ignition switch ON
    		11 to 14 V
    *a
    		Front view of wire harness connector
    (to Turn Assist Function Switch [Suspension Control Switch])


NG
REPLACE MASTER CYLINDER SOLENOID (Click here)
OK

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

6.CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU EXI4 CIRCUIT)

  1. Turn the ignition switch off.

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



    Land Cruiser. Urj200, 202 Grj200 Vdj200.Brake Control Dynamic Control Systems.Anti-Lock Brake System.Vehicle Stability Control System Turn Assist Indicator Light Circuit

  1. Disconnect the turn assist function switch (integration control and panel assembly) connector.

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    V8-12 (ECU) - Body ground
    		Ignition switch ON
    		11 to 14 V
    *a
    		Front view of wire harness connector
    (to Turn Assist Function Switch [Integration Control and Panel Assembly])
    Result
    Result
    		Proceed to
    OK
    		A
    NG (for LHD)
    		B
    NG (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)