2003 Lexus LS 430FACTORY OEM SERVICE PROCEDURE

With Hand-Held Tester

  1. Hook up the hand-held tester to the DLC3. See Figure.
  2. Check that the shift lever is at "P" position. Turn the steering wheel to the straight ahead position.
  3. Start the engine and check that the "VSC TEST" is displayed on the multi-information display. If the "VSC TEST" does not display, check the VSC warning indicator circuit and Ts terminal circuit. See SYSTEM TESTING .
  4. Shift the lever to the "D" range and drive the vehicle at approximately 3 mph (5 km/h). Turn the steering wheel either to left or right 90 degrees or more and continue until completing a 180 degree or more turn. Do not spin the wheels. Stop the vehicle and shift the lever to "P" position. Ensure the VSC buzzer sounds for 3 seconds.
  5. If the VSC buzzer sounds, the sensor check is normal. If the buzzer does not sound, check the VSC buzzer circuit. Then do the sensor check again. See SYSTEM TESTING .
  6. If the buzzer still won't sound, there is a malfunction in the VSC sensor. Check the DTC. See DIAGNOSTIC TROUBLE CODE DEFINITIONS  under SELF-DIAGNOSTIC SYSTEM.
  7. Using special tool (09843-18040) connect terminals Tc and CG of DLC3. See Figure.
  8. Read the number of displays on the multi-information display.
  9. Disconnect the special tool and turn ignition switch OFF.
Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.

Shop Manual-Ready ToolsCompare Repair QuoteQuote Shield Pro

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

Rather have a pro handle this?

A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.

Comes to youSame-day available12-month warranty
Get a Free Quote

No obligation. See pricing before you book.