2003 Lexus LS 430FACTORY OEM SERVICE PROCEDURE

Suspension Control System: Precaution

WARNING: This page is about a different car, the 2005 Toyota 4Runner. However, it is still accessible from the selected car via links, so may be relevant.
  1. JACK OR LIFT UP AND DOWN 
    1. When jacking up or lifting up, stop operating the air suspension control system by pressing the height control OFF switch.
      Fig 1: Identifying Height Control OFF Switch
      G02572421Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. DISCONNECT AND CONNECT HEIGHT CONTROL TUBE 
    NOTE:
    • Disconnecting and connecting the height control tube should be performed by hand to prevent foreign objects form entering.
    • Never damage the height control tube.
    1. Disconnect the height control tube.
      1. Pinch "A" of the connector No. 1 and pull it out from the housing.
        Fig 2: Pinching "A" And Pulling Out From Housing
        G02572422Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Set SST to the tube.

        SST 09730-00010

        Fig 3: Setting SST To Tube
        G02572423Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      3. Insert SST into the housing to expand the claw of connector No. 2 in the housing.
        Fig 4: Inserting SST Into Housing To Expand Claw Of Connector No. 2 In Housing
        G02572424Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      4. Pull out the tube with SST inserted.
        NOTE: Never pull the tube forcibly.
      5. Insert a flat-head thin-bladed screwdriver into the circular hole on the housing, remove a connector No. 2, 2 O-rings and a plate from the housing.

      HINT:

      O-ring, plate and connector No.2 are non-reusable parts.

    2. Install height control tube O-ring and plate.
      Fig 5: Installing Height Control Tube O-Ring And Plate
      G02572425Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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.