2007 Lexus LX 470FACTORY OEM SERVICE PROCEDURE

Knock Sensor: Installation

  1. INSTALL KNOCK CONTROL SENSOR 
    1. Install the 2 knock sensors with the 2 nuts, as shown in the illustration.

      Torque: 20 N*m (204 kgf*cm, 15 ft.*lbf) 

    2. Connect the 2 knock sensor connectors.
  2. INSTALL AIR PUMP ASSEMBLY (See  INSTALLATION  ) 
  3. INSTALL INTAKE MANIFOLD ASSEMBLY (see  INSTALLATION  ) 
  4. CONNECT FUEL MAIN HOSE (see  INSTALLATION  ) 
  5. CONNECT FUEL RETURN HOSE (see  INSTALLATION  ) 
  6. INSTALL INTAKE AIR CONNECTOR PIPE (See  INSTALLATION   ) 
  7. INSTALL V-BANK COVER SUB-ASSEMBLY (See  INSTALLATION   ) 
    Fig 1: Identifying Knock Sensor Angle
    G05196939Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  8. CONNECT CABLE TO NEGATIVE BATTERY TERMINAL 
  9. PERFORM INITIALIZATION 
    1. Perform initialization (see INITIALIZATION ).
      NOTE: Certain systems need to be initialized after disconnecting and reconnecting the cable from the negative (-) battery terminal.
  10. ADD ENGINE COOLANT (see  REPLACEMENT  ) 
  11. CHECK FOR ENGINE COOLANT LEAKS 
    1. Check for engine coolant leaks (see ON-VEHICLE INSPECTION ).
  12. CHECK FOR FUEL LEAKS 
    1. Check for fuel leaks (see ON-VEHICLE INSPECTION ).
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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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