Vehicle Stability Control System (W/ Vdim) Vsc Warning Light Does Not Come 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 VSC WARNING LIGHT

INSPECT COMBINATION METER ASSEMBLY

VEHICLE STABILITY CONTROL SYSTEM (w/ VDIM) - VSC Warning Light does not Come 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/ Vdim) Vsc Warning Light Does Not Come On


INSPECTION PROCEDURE

NOTICE:
When replacing the skid control ECU, perform zero point calibration and store system information (Click here).
1.CHECK CAN COMMUNICATION SYSTEM

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

    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 VSC WARNING LIGHT

  1. Connect the intelligent tester to the DLC3.

  1. Start the engine.

  1. Select the "VSC Warning Lamp" in the Active Test and operate the VSC warning (multi information display and master caution indicator light) light by the intelligent tester.

    ABS / VSC:
    Item (Display)
    		Vehicle Condition / Test Details
    		Diagnostic Note
    VSC Warning Lamp
    		Turn VSC warning (multi information display and master caution indicator light) light ON / OFF
    		Observe combination meter

  1. Check that "ON" and "OFF" of the VSC warning (multi information display and master caution indicator light) light are indicated on the combination meter when using the intelligent tester.

    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).


OK
REPLACE SKID CONTROL ECU
NG


4.INSPECT COMBINATION METER ASSEMBLY

  1. Turn the engine switch off.

  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 (Click here).


NG
REPLACE COMBINATION METER ASSEMBLY
OK

REPLACE SKID CONTROL ECU