2001 Lexus LS 430FACTORY OEM SERVICE PROCEDURE

Using Scan Tool

  1. Remove intake manifold cover located on top of engine. Start and warm engine up to normal operating temperature. Shut engine off. Connect scan tool to DLC3. See Figure. Use scan tool to read engine RPM.
  2. Connect timing light to lead wire at ignition coil electrical connector on top of driver's side valve cover at cylinder No. 1. See Figure. Cylinder No. 1 is front cylinder on left side of engine when viewed from flywheel end of engine. See Figure.
  3. Apply parking brake. Place transmission in Neutral. Ensure idle speed is 700-800 RPM. Check timing marks located on timing belt cover, near crankshaft pulley. Ensure base timing is 8-12 degrees BTDC at idle with A/C and all accessories off. Shut engine off. Remove timing light and scan tool. Reinstall intake manifold cover.
Factory Service Tools

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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.

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