2003 Lexus LS 430FACTORY OEM SERVICE PROCEDURE

On-Vehicle Repair

WARNING: This page is about a different car, the 2003 Lexus LX 470. However, it is still accessible from the selected car via links, so may be relevant.
  1. REMOVE ENGINE No. 2 UNDER COVER 
  2. DRAIN ATF 
  3. REMOVE OIL PAN (See  VALVE BODY ASSEMBLY   ) 
  4. REMOVE OIL STRAINER (See  VALVE BODY ASSEMBLY   ) 
    Fig 1: Disconnecting Solenoid Valve Connectors
    G01352569Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. REMOVE ATF TEMPERATURE SENSOR 
    1. Disconnect the 7 solenoid valve connectors.
    2. Remove the 2 bolts and disconnect the 2 ATF temperature sensors.
      Fig 2: Removing Transmission Wire Harness
      G01352570Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Disconnect the solenoid connector.
    4. Remove the bolt and the transmission wire harness.
      Fig 3: Connecting Solenoid Valve Connectors
      G01352571Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  6. INSTALL ATF TEMPERATURE SENSOR 
    1. Install the transmission wire harness.
    2. Install the bolt.

      Torque: 5.4 N.m (55 kgf.cm, 48 in.lbf) 

    3. Connect the solenoid connector.
    4. Connect the 7 solenoid valve connectors.
    5. Connect the 2 ATF temperature sensors with the 2 bolts.

      Torque: 

      A: 11 N.m (112 kgf.cm, 8 ft.lbf) 

      B: 10 N.m (100 kgf.cm, 7 ft.lbf) 

      Bolt length: 

      Bolt A: 36 mm (1.42 in.) 

      Bolt B: 12 mm (0.47 in.) 

      Sensor wire harness: 

      Fig 4: Sensor Wire Harness Color Table
      G01352572Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  7. INSTALL OIL STRAINER (See  VALVE BODY ASSEMBLY   ) 
  8. INSTALL OIL PAN (See  VALVE BODY ASSEMBLY   ) 
  9. FILL ATF AND CHECK ATF LEVEL (See  CHECKING FLUID LEVELS  ) 
  10. INSTALL ENGINE No. 2 UNDER 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.