2009 Lexus LS 600hLFACTORY OEM SERVICE PROCEDURE

Zero Point Calibration

  1. Zero point calibration procedures
    1. Check that all of the following conditions are met:
      • The vehicle is parked on a level surface.
      • No objects are placed on the front passenger seat.
      • The front passenger seat belt buckle switch is OFF.
    2. Adjust the seat position according to the table below.
      Adjustment Item Position
      Slide Direction Rearmost position
      Reclining Angle Upright position
      Headrest Height Lowest position
      Lifter Height Lowest position
    3. Connect the Techstream to the DLC3.
    4. Turn the power switch ON (IG).
    5. Perform zero point calibration by following the prompts on the tester screen.

      HINT: 

      • Refer to the Techstream operator's manual for further details.
      • If the zero point calibration is performed when the calibration conditions are not satisfied, DTC B1797 is output.
      • If the zero point calibration has failed, DTC B1797 is output.
      • If After Exchange is selected before the previous ECU data are stored in the Techstream, the display screen returns to CONDITION SELECT ECU: Occupant Detect.
      Item Procedure
      DTC Perform DTC check and repair
      Write error Replace front seat set (with occupant classification ECU and occupant detection sensor)
      Temperature Check value of THERMISTOR TEMP in ECU DATA LIST
      Pressure Check value of FILTERED PRESS in ECU DATA LIST
      Crash counter -
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.