Knock Sensor, Intake Manifold: Removal

DISCHARGE FUEL SYSTEM PRESSURE (see ON-VEHICLE INSPECTION )
DRAIN COOLANT (see REPLACEMENT )
DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL
CAUTION: Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to prevent airbag and seat belt pretensioner activation.
REMOVE NO. 1 ENGINE COVER (see ON-VEHICLE INSPECTION )
REMOVE AIR CLEANER CAP (see REMOVAL )
REMOVE THROTTLE BODY (see INSPECTION )
REMOVE FUEL DELIVERY PIPE (see REMOVAL )
DISCONNECT FUEL TUBE
REMOVE HEATER WATER INLET HOSE
1. Remove the hose clamp.
2. Remove the heater water inlet hose from the heater radiator unit and cylinder head.
REMOVE HEATER WATER OUTLET HOSE
1. Remove the heater water outlet hose from the heater radiator unit and water by-pass pipe.
REMOVE INTAKE MANIFOLD
1. Disconnect the union to check valve hose from the brake booster.
2. Disconnect the camshaft timing oil control valve connector.
3. Remove the wire harness clamp.
4. Remove the union to check valve hose from the vacuum hose clamp.
5. Remove the 5 bolts, 2 nuts and intake manifold.
  
  Fig 1: Locating Intake Manifold Nuts And Bolts
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
6. Remove the gasket from the intake manifold.
Fig 2: Locating Intake Manifold Gasket
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
REMOVE INTAKE MANIFOLD INSULATOR
1. Remove the intake manifold insulator from the cylinder block.
Fig 3: Removing Intake Manifold Insulator
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
REMOVE KNOCK SENSOR
1. Disconnect the sensor connector.
2. Remove the nut and sensor.
Fig 4: Measuring Resistance Of Sensor
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002