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Home >> Lexus >> 2006 >> GX 470 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - System And Circuit Testing, On-Vehicle Inspection, Removal, Inspection, Installation >> Knock Sensor, Intake Manifold >> Removal
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Knock Sensor, Intake Manifold: Removal

  1. DISCHARGE FUEL SYSTEM PRESSURE (See  REMOVAL  ) 
  2. DRAIN ENGINE COOLANT (See  REPLACEMENT  ) 
  3. REMOVE V-BANK COVER SUB-ASSEMBLY (See  REMOVAL  ) 
  4. REMOVE AIR CLEANER HOSE ASSEMBLY 
    1. Disconnect the vacuum hoses (for the power steering idle-up and fuel pressure regulator) and ventilation hose.
    2. Remove the air cleaner hose assembly.
  5. DISCONNECT FUEL HOSE (See  REMOVAL  ) 
  6. DISCONNECT FUEL HOSE NO.2 (See  REMOVAL  ) 
  7. DISCONNECT CONNECTORS FROM INTAKE MANIFOLD 
    1. Disconnect the throttle control connector.
    2. Disconnect the purge VSV connector.
    3. Disconnect the 8 injector connectors.
    4. Disconnect the ECT sensor connector.
    5. Disconnect the 2 VSV connectors for the air injection system.
    6. Disconnect the 8 ignition coil connectors.
    7. Disconnect the 2 air fuel ratio sensor connectors.
  8. DISCONNECT HOSES FROM INTAKE MANIFOLD 
    Fig 1: Identifying PCV Hoses, EVAP Hose & Vacuum Hoses
    G04968231Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
    1. Disconnect the vacuum hose [A] from the fuel pressure regulator.
    2. Disconnect the PCV hoses [B] from the PCV valve on the LH cylinder head.
    3. Disconnect the EVAP hose (from the charcoal canister) [C] from the VSV for the EVAP.
    4. Disconnect the 2 vacuum hoses [D] from the VSV for the air injection system.
  9. REMOVE INTAKE MANIFOLD 
    Fig 2: Identifying Water By-Pass Hoses
    G04968232Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
    1. Disconnect the 2 water by-pass hoses from the throttle body.
      2. Fig 3: Identifying Wire Clamps
      G04968233Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
    2. Disconnect the 2 wire clamps from the wire clamp bracket on the RH delivery pipe.
    3. Remove the bolt and nut holding the engine wire protector from the intake manifold and cylinder head.
    4. Remove the 2 bolts and ground cables from the RH and LH cylinder heads.
      5. Fig 4: Identifying V-Bank Cover Bracket & Bolt
      G04968234Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
    5. Remove the bolt and V-bank cover bracket from the intake manifold.
      6. Fig 5: Identifying Engine Hanger & Wire Bracket
      G04968235Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
    6. Disconnect the engine wire from the engine hanger and wire bracket.
    7. Remove the bolt and wire bracket from the intake manifold.
      8. Fig 6: Identifying Intake Manifold Assembly, Bolts & Nuts
      G04968236Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
    8. Remove the 6 bolts, 4 nuts, intake manifold assembly and 2 gaskets.
  10. REMOVE AIR PUMP ASSEMBLY WITH BRACKET (See  REMOVAL  ) 
  11. REMOVE KNOCK SENSOR 
    Fig 7: Identifying Knock Sensor
    G04968237Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
    1. Disconnect the 2 knock sensor connectors.
    2. Remove the 2 nuts and 2 knock sensors.
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