2008 Lexus IS FFACTORY OEM SERVICE PROCEDURE

Knock Sensor: Installation

  1. INSTALL KNOCK CONTROL SENS OR 
    1. Install the 4 knock control sensors with the 4 bolts so that the sensors are angled as shown in the illustration

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

      NOTE: The acceptable installation angle of the knock control sensors is within +/-10° from the horizontal position.
    2. Connect the 4 knock control sensor connectors.
      Fig 1: Identifying Knock Control Sensors With Bolts
      G05751979Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. INSTALL CASE SEPARATOR 
    1. Install the case separator with the 4 bolts.

      Torque: 10 N*m (102 kgf*cm, 7 ft.*lbf) 

      Fig 2: Locating Case Separator Bolts
      G04943090Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Connect the fuel pressure sensor connector.
      3. Fig 3: Identifying Fuel Pressure Sensor Connector
      G04943089Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. INSTALL NO. 4 FUEL PIPE SUB-ASSEMBLY  (See INSTALLATION )
  4. INSTALL NO. 2 ENGINE COVER SUB-ASSEMBLY LH  (See INSTALLATION )
  5. INSTALL NO. 1 ENGINE COVER SUB-ASSEMBLY  (See INSTALLATION )
  6. INSTALL INTAKE AIR SURGE TANK ASSEMBLY 
    1. Install the intake air surge tank assembly (See INSTALLATION )
  7. CONNECT CABLE TO NEGATIVE BATTERY TERMINAL 
    NOTE: When disconnecting the cable, some systems need to be initialized after the cable is reconnected (See INITIALIZATION ).
  8. INSPECT FOR FUEL LEAK  (See ON-VEHICLE INSPECTION )
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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