2006 Lexus RX 400h AWDFACTORY OEM SERVICE PROCEDURE

Knock Sensor: Components: Removal

  1. DISCHARGE FUEL SYSTEM PRESSURE 

    (See FUEL SYSTEM )

  2. PRECAUTION 

    (See PRECAUTION )

  3. REMOVE ENGINE ROOM SIDE LH COVER (See  REMOVAL  ) 
  4. REMOVE ENGINE ROOM COVER SIDE (See  REMOVAL  ) 
  5. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL 
  6. DRAIN COOLANT (See  COOLANT  ) 
  7. REMOVE FRONT WIPER ARM AND BLADE ASSEMBLY RH (See  REMOVAL  ) 
  8. REMOVE FRONT WIPER ARM AND BLADE ASSEMBLY LH (See  REMOVAL  ) 
  9. REMOVE COWL TOP VENTILATOR LOUVER SUBASSEMBLY (See  REMOVAL  ) 
  10. REMOVE WINDSHIELD WIPER MOTOR AND LINK ASSEMBLY (See  REMOVAL  ) 
  11. REMOVE COWL TOP PANEL SUB-ASSEMBLY OUTER (See  REMOVAL  ) 
  12. REMOVE COOL AIR INTAKE DUCT SEAL (See  REMOVAL  ) 
  13. REMOVE AIR CLEANER CAP W/ INLET (See  REMOVAL   ) 
  14. REMOVE AIR CLEANER CASE W/ RESONATOR (See  REMOVAL   ) 
  15. SEPARATE BRAKE MASTER CYLINDER RESERVOIR SUB-ASSEMBLY (See  REMOVAL  ) 
  16. REMOVE RESERVOIR BRACKET (See  REMOVAL  ) 
  17. REMOVE AIR CLEANER BRACKET (See  REMOVAL  ) 
  18. REMOVE ENGINE MOVING CONTROL ROD (See  REMOVAL  ) 
  19. REMOVE EMISSION CONTROL VALVE SET 
    1. Disconnect the VSV connector (A).
    2. Remove the wire harness clamp (B).
    3. Disconnect the fuel vapor feed hose No. 1 (C).
    4. Disconnect the fuel vapor feed hose No. 2 (D).
    5. Remove the 2 nuts (E), then remove the emission control valve set.
      Fig 1: Identifying Emission Control Valve Set And Nuts
      G04110890Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  20. REMOVE INTAKE AIR SURGE TANK 
    1. Disconnect the throttle motor connector (A).
    2. Separate the water bypass hose No. 2 (B).
    3. Separate the water bypass hose No. 3 (C).
    4. Separate the fuel vapor feed hose (D).
      Fig 2: Identifying Throttle Motor Connector
      G04110891Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. Disconnect the ventilation hose.
      Fig 3: Identifying Ventilation Hose
      G04110892Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    6. Remove the 2 bolts, then remove the engine hanger No.1 (A).
    7. Remove the 2 bolts, then remove the surge tank stay No. 1 (B).
    8. Remove the 2 bolts, then remove the surge tank stay No. 2 (C).
      Fig 4: Identifying Engine Hanger No.1 And Bolts
      G04110893Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    9. Disconnect the ground cable connector.
    10. Using a socket hexagon wrench 8 mm, remove the 4 bolts.
    11. Remove the 2 nuts, then remove the emission control valve bracket and the intake air surge tank.
    12. Remove the gasket from the intake air surge tank.
      Fig 5: Identifying Ground Cable Connector
      G04110894Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  21. DISCONNECT FUEL PIPE SUB-ASSEMBLY 
    1. Remove the EFI fuel pipe clamp No.1.
    2. Pinch the quick connector and then pull out the fuel pipe No. 1.
      Fig 6: Identifying EFI Fuel Pipe Clamp No.1
      G04110895Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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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