VSC Warning Light does not Come ON: Wiring Diagram

WARNING: This page is about a different car, the 2006 Lexus IS 350. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Wiring Diagram

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NOTE: When replacing the skid control ECU, perform zero point calibration (See CALIBRATION ).

CHECK CAN COMMUNICATION SYSTEM

Check if the CAN communication system DTC is output (See DIAGNOSIS SYSTEM ).

Result

CONDITION CHART

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

B : INSPECT CAN COMMUNICATION SYSTEM

A : GO TO NEXT STEP

CHECK MULTIPLEX COMMUNICATION SYSTEM

Check if the multiplex communication system DTC is output (See DTC CHECK/CLEAR ).

Result

CONDITION CHART

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

B : INSPECT MULTIPLEX COMMUNICATION SYSTEM

A : GO TO NEXT STEP

CHECK VSC WARNING LIGHT

Connect the intelligent tester to the DLC3.
Start the engine.

Select the "VSC WARN 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:

VEHICLE CONDITION CHART

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

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 (See PROBLEM SYMPTOMS TABLE ).

OK : REPLACE SKID CONTROL ECU

NG : GO TO NEXT STEP

INSPECT COMBINATION METER ASSEMBLY
1. Turn the engine switch off.
2. Perform Active Test of the combination meter (meter CPU) using the intelligent tester (See DATA LIST / ACTIVE TEST ).
  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 (See PROBLEM SYMPTOMS TABLE ).
NG : REPLACE COMBINATION METER ASSEMBLY

OK : REPLACE SKID CONTROL ECU