2006 Lexus RX 400h FWDFACTORY OEM SERVICE PROCEDURE

Knock Sensor: Installation

  1. INSTALL KNOCK CONTROL SENSOR 
    1. Install the 2 knock sensors so that it is horizontal as shown in the illustration. Then install the 2 bolts.
      Fig 1: Identifying Knock Sensors Is Horizontal
      G04110907Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Torque: 20 N*m (199 kgf*cm, 15 ft.*lbf) 

      HINT:

      It is acceptable for the sensor to be tilted 5°. 

    2. Connect the 2 knock sensor connectors.
      Fig 2: Identifying Knock Sensor Connectors
      G04110908Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. INSTALL WATER OUTLET (See  INSTALLATION  ) 
  3. INSTALL INTAKE MANIFOLD 
    1. Install the intake manifold with the 9 bolts, 2 nuts and 2 washers. Using several steps, tighten the bolts and nuts uniformly in the sequence shown in the illustration.

      Torque: 15 N*m (153 kgf*cm, 11 ft.*lbf) 

    2. Retighten the water outlet mounting bolts and nuts.

      Torque: 15 N*m (153 kgf*cm, 11 ft.*lbf) 

    3. Connect the 6 fuel injector connectors.
    4. Install the ground cable with the nut.

      Torque: 8.4 N*m (86 kgf*cm, 74 in.*lbf) 

      Fig 3: Tightening Bolts And Nuts In Sequence
      G04110909Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. CONNECT RADIATOR HOSE INLET 
    1. Connect the radiator hose inlet.
      Fig 4: Identifying Radiator Hose Inlet
      G04110910Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. CONNECT HEATER WATER INLET HOSE 
    1. Connect the heater water inlet hose.
      Fig 5: Identifying Heater Water Inlet Hose
      G04110911Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  6. CONNECT FUEL PIPE SUB-ASSEMBLY 
    1. Align the quick connector with the pipe, then push in the quick connector until the retainer makes a "click" sound to connect the fuel hose to the fuel pipe.
      Fig 6: Aligning Quick Connector With Pipe
      G04110912Courtesy 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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