Knock Sensor: Removal

DISCHARGE FUEL SYSTEM PRESSURE (See ON-VEHICLE INSPECTION )
DRAIN ENGINE COOLANT (See COOLANT )
REMOVE V-BANK COVER SUB-ASSEMBLY (See REMOVAL )
REMOVE AIR CLEANER CAP SUB-ASSEMBLY
REMOVE EMISSION CONTROL VALVE SET
REMOVE INTAKE AIR SURGE TANK
REMOVE INTAKE MANIFOLD
1. Disconnect the fuel pipe No. 1.
  1. Remove the fuel pipe clamp.
    
    Fig 1: Disconnecting Fuel Pipe No. 1
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. Pinch the tube connector and then pull out the fuel pipe No. 1.
    NOTE:
    Check the connector for dirt, mud or other contamination. Clean if necessary.
    
    Be sure to keep the tube connector, pipe and O-ring clean. They can become contaminated easily.
    
    Do not use tools when disconnecting the fuel pipe.
    
    Do not bend or twist the nylon tube. Protect the connector by covering it with a vinyl or plastic bag.
    
    When the pipe and the connector are stuck, push and pull the connector to release it. Then pull the connector out carefully.
    
    Fig 2: Identifying Tube Connector
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Lock the hose clamp, as shown in the illustration.
3. Disconnect the heater inlet water hose.
  
  Fig 3: Locating Hose Clamp
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Remove the nut and disconnect the ground cable.
5. Disconnect the 6 fuel injector connectors.
  
  Fig 4: Locating Fuel Injector Connectors
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
6. Loosen and remove the intake manifold's 9 bolts and 2 nuts uniformly in the numerical order shown in the illustration.
7. Remove the intake manifold.
  NOTE: Fully removing each bolt and nut one by one may damage the intake manifold, bolts and nuts.
REMOVE ENGINE MOVING CONTROL ROD

Fig 5: Identifying Loosening Sequence Of Intake Manifold Bolts And Nuts
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
REMOVE WATER OUTLET
1. Disconnect the radiator hose inlet.
  
  Fig 6: Locating Radiator Hose Inlet
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the ECT sensor connector.
3. Remove the clamp.
4. Remove the 2 bolts, 2 nuts and 2 washers.
5. Lock the hose clamp as shown in the illustration. Then remove the water outlet together with the water by-pass hose No. 1.
6. Remove the 2 gaskets from the 2 cylinder heads.
  
  Fig 7: Locating ECT Sensor Connector Bolts, Nuts And Washers
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
REMOVE KNOCK SENSOR
1. Disconnect the 2 knock sensor connectors.
2. Remove the 2 nuts and 2 knock sensors.
  
  Fig 8: Locating Knock Sensor Connectors
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002