Vehicle Stability Control System Vsc Off Indicator Light Remains On


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK FOR DTC

CHECK TERMINAL VOLTAGE (EXI3 TERMINAL)

CHECK HARNESS AND CONNECTOR (EXI3 TERMINAL CIRCUIT)

INSPECT REAR DIFFERENTIAL LOCK SYSTEM

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

PERFORM ACTIVE TEST USING INTELLIGENT TESTER (VSC WARNING LIGHT)

INSPECT VSC OFF SWITCH

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

CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - COMBINATION METER)

VEHICLE STABILITY CONTROL SYSTEM - VSC OFF Indicator Light Remains ON


DESCRIPTION

If the skid control ECU (brake actuator assembly) stores a DTC, the VSC OFF indicator light blinks in the combination meter.
Pressing the VSC OFF switch turns off traction control and pressing and holding this switch turns off traction control and VSC. If VSC turns off, the VSC OFF indicator light will come on.
for 4WD:
When the transfer position is LL, VSC is prohibited and the VSC OFF indicator and slip indicator lights turn on.
w/ Rear Differential Lock:
When the rear differential is locked, VSC is prohibited, and the VSC OFF indicator and slip indicator lights turn on.

WIRING DIAGRAM


Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.Brake Control.Vehicle Stability Control System.Vehicle Stability Control System Vsc Off Indicator Light Remains On


INSPECTION PROCEDURE

NOTICE:
  1. As there may be malfunctions in the transfer system related to when the transfer operates in LL, check the transfer system first (Toyota Fortuner RM00000112G003X.html).
  2. After replacing the brake actuator assembly, perform calibration (Toyota Fortuner RM000000XHR06WX.html).
  3. Before disconnecting the connector, make sure that there are no problems with the connection.
  4. After disconnecting the connector, make sure that the connector case and terminals are not deformed or corroded.
1.CHECK FOR DTC

  1. Check if DTCs for the VSC are output (Toyota Fortuner RM000000XHV0C7X.html).

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


B
REPAIR CIRCUITS INDICATED BY OUTPUT DTCS (Toyota Fortuner RM000000XHU08LX.html)
A


2.CHECK TERMINAL VOLTAGE (EXI3 TERMINAL)


    Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.Brake Control.Vehicle Stability Control System.Vehicle Stability Control System Vsc Off Indicator Light Remains On

  1. Turn the ignition switch off.

  1. Disconnect the skid control ECU (brake actuator assembly) connector.

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    S25-28 (EXI3) - Body ground
    		Ignition switch ON
    		11 to 14 V
    Text in Illustration
    *a
    		Front view of wire harness connector
    (to Skid Control ECU [Brake Actuator Assembly])
Result
Result
Proceed to
NG
w/ Rear Differential Lock
A
w/o Rear Differential Lock
B
OK
C


B
REPAIR OR REPLACE HARNESS OR CONNECTOR

C
Go to step 6
A


3.CHECK HARNESS AND CONNECTOR (EXI3 TERMINAL CIRCUIT)

  1. Turn the ignition switch off.

  1. Disconnect the rear differential lock position switch (No. 4 transfer indicator switch) connector.

  1. Disconnect the rear differential lock ECU (4 wheel drive control ECU) connector.

  1. Disconnect the skid control ECU (brake actuator assembly) connector.

  1. Disconnect the C28 combination meter connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    S25-28 (EXI3) - T29-2
    		Always
    		Below 1 Ω
    S25-28 (EXI3) - C28-9
    		Always
    		Below 1 Ω
    S25-28 (EXI3) - F18-1 (RLP)
    		Always
    		Below 1 Ω
    S25-28 (EXI3) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.INSPECT REAR DIFFERENTIAL LOCK SYSTEM


NG
GO TO DIFFERENTIAL SYSTEM (PROBLEM SYMPTOMS TABLE) (Toyota Fortuner RM000002M8U00LX.html)
OK


5.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
    		VSC OFF switch / Normal, Unknown, 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:
    The intelligent tester display changes according to VSC OFF switch operation.


NG
Go to step 7
OK


6.PERFORM ACTIVE TEST USING INTELLIGENT TESTER (VSC WARNING LIGHT)

  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 / Active Test.

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

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

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

Result
Result
Proceed to
Data List Display
Data List Display When Performing Active Test ON/OFF Operation
ON
Does not change between ON and OFF
A
Changes between ON and OFF
B
OFF
Does not change between ON and OFF
A
Changes between ON and OFF
B


B
Go to step 9
A

REPLACE BRAKE ACTUATOR ASSEMBLY (Toyota Fortuner RM0000010K0010X.html)

7.INSPECT VSC OFF SWITCH

  1. Turn the ignition switch off.

  1. Remove the VSC OFF switch (Toyota Fortuner RM000001WZ200QX.html).

  1. Inspect the VSC OFF switch (Toyota Fortuner RM000001WZ000SX.html).



NG
REPLACE VSC OFF SWITCH (Toyota Fortuner RM000001WZ200QX.html)
OK


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

  1. Turn the ignition switch off.

  1. Disconnect the VSC OFF switch connector.

  1. Disconnect the skid control ECU (brake actuator assembly) connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    S25-30 (CSW) - V5-3
    		Always
    		Below 1 Ω
    S25-30 (CSW) - Body ground
    		Always
    		10 kΩ or higher
    V5-4 - Body ground
    		Always
    		Below 1 Ω


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE BRAKE ACTUATOR ASSEMBLY (Toyota Fortuner RM0000010K0010X.html)

9.CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - COMBINATION METER)

  1. Turn the ignition switch off.

  1. Disconnect the skid control ECU (brake actuator assembly) connector.

  1. Disconnect the C28 combination meter connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    S25-15 (VSCW) - C28-16
    		Always
    		Below 1 Ω
    S25-15 (VSCW) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

GO TO METER / GAUGE SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) (Toyota Fortuner RM0000011IT01AX.html)