Vehicle Stability Control System (W/O Vdim) Vsc Warning 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 COMBINATION METER ASSEMBLY

VEHICLE STABILITY CONTROL SYSTEM (w/o VDIM) - VSC Warning Light Remains ON


DESCRIPTION

The skid control ECU is connected to the combination meter via CAN and multiplex communications.
If the ECU stores a DTC, the master caution indicator light will come on and the DTC will be displayed on the multi information display in the combination meter.

WIRING DIAGRAM


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


INSPECTION PROCEDURE

NOTICE:
When replacing the brake actuator assembly, perform zero point calibration (Click here).
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 COMBINATION METER ASSEMBLY

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

    OK:
    The VSC warning (multi information display and master caution indicator light) 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