Vehicle Stability Control System (W/O Vdim) Slip Indicator Light Remains On

Brake. Lexus Is250, Is220D. Gse20 Ale20
Brake Control. Lexus Is250, Is220D. Gse20 Ale20

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK CAN COMMUNICATION SYSTEM

CHECK MULTIPLEX COMMUNICATION SYSTEM

CHECK IF SKID CONTROL ECU CONNECTOR IS SECURELY CONNECTED

CHECK BATTERY

INSPECT TRACTION OFF SWITCH

INSPECT TRACTION OFF SWITCH (GROUND TERMINAL)

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

INSPECT COMBINATION METER ASSEMBLY

VEHICLE STABILITY CONTROL SYSTEM (w/o VDIM) - Slip Indicator Light Remains ON


DESCRIPTION

The skid control ECU is connected to the combination meter via CAN and multiplex communications.
The SLIP indicator blinks during VSC and/or TRC operation.
When the system fails, the SLIP indicator comes on to warn the driver (Click here).
The SLIP indicator comes on when traction control is terminated by pressing the traction OFF switch.

WIRING DIAGRAM


Lexus Is250, Is220D. Gse20 Ale20.Brake Control.Vehicle Stability Control System (W/ Vdim).Vehicle Stability Control System (W/O Vdim) Slip Indicator Light Remains On


INSPECTION PROCEDURE

NOTICE:
When replacing the brake actuator assembly, perform zero point calibration (Click here).
HINT:
The SLIP indicator light comes on when the traction OFF switch is ON.
1.CHECK CAN COMMUNICATION SYSTEM

  1. Check if the CAN communication system DTC is output (Click here for LHD (gasoline), Click here for RHD (gasoline), Click here for LHD (diesel), or Click here for RHD (diesel)).

    Result:

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


B
INSPECT CAN COMMUNICATION SYSTEM
A


2.CHECK MULTIPLEX COMMUNICATION SYSTEM

  1. Check if the multiplex communication system DTC is output (Click here).

    Result:

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


B
INSPECT MULTIPLEX COMMUNICATION SYSTEM
A


3.CHECK IF SKID CONTROL ECU CONNECTOR IS SECURELY CONNECTED

  1. Check if the skid control ECU connector is securely connected.

    OK:
    The connector should be securely connected.


NG
CONNECT CONNECTOR TO ECU CORRECTLY
OK


4.CHECK BATTERY

  1. Check the battery voltage.

    Standard voltage:
    11 to 14 V


NG
CHECK AND REPLACE CHARGING SYSTEM OR BATTERY
OK


5.INSPECT TRACTION OFF SWITCH


    Lexus Is250, Is220D. Gse20 Ale20.Brake Control.Vehicle Stability Control System (W/ Vdim).Vehicle Stability Control System (W/O Vdim) Slip Indicator Light Remains On

  1. Disconnect the traction OFF switch connector.

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

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    3 - 4
    		Switch is pressed
    		Below 1 Ω
    3 - 4
    		Switch is not pressed
    		10 kΩ or higher


NG
REPLACE TRACTION OFF SWITCH
OK


6.INSPECT TRACTION OFF SWITCH (GROUND TERMINAL)


    Lexus Is250, Is220D. Gse20 Ale20.Brake Control.Vehicle Stability Control System (W/ Vdim).Vehicle Stability Control System (W/O Vdim) Slip Indicator Light Remains On

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

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    J37-4 - Body ground
    		Always
    		Below 1 Ω


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (GROUND CIRCUIT)
OK


7.CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - TRACTION OFF SWITCH)


    Lexus Is250, Is220D. Gse20 Ale20.Brake Control.Vehicle Stability Control System (W/ Vdim).Vehicle Stability Control System (W/O Vdim) Slip Indicator Light Remains On

  1. Disconnect the skid control ECU connector.

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

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    A14-43 (CSW) - J37-3
    		Always
    		Below 1 Ω
    A14-43 (CSW) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


8.INSPECT COMBINATION METER ASSEMBLY

  1. Reconnect the skid control ECU connector and the traction OFF switch connector.

  1. Perform Active Test of the combination meter (meter CPU) using the intelligent tester (Click here).

    OK:
    The SLIP indicator light turns on or off in accordance with the intelligent tester.
    HINT:
    If troubleshooting has been carried out according to the Problem Symptoms Table, refer back to the table and proceed to the next step before replacing the part (Click here).


NG
REPLACE COMBINATION METER ASSEMBLY
OK

REPLACE BRAKE ACTUATOR ASSEMBLY