Knock Sensor: Removal

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 RADIATOR SUPPORT OPENING COVER (See REMOVAL )
REMOVE ENGINE UNDER COVER LH
DRAIN ENGINE COOLANT (See COOLANT )
REMOVE AIR CLEANER ASSEMBLY (See REMOVAL )
REMOVE OIL DIPSTICK GUIDE
1. Remove the dipstick.
2. Disconnect the wire harness clamp.
3. Remove the bolt and dipstick guide.
  
  Fig 1: Locating Wire Harness Clamp
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
REMOVE INTAKE MANIFOLD SUB-ASSEMBLY
1. Disconnect the ventilation hose from the throttle with motor body.
2. Disconnect the No. 2 ventilation hose.
3. Disconnect the No. 1 fuel vapor feed hose.
  
  Fig 2: Locating No. 1 Fuel Vapor Feed Hose
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Disconnect the water by-pass hose.
5. Disconnect the No. 2 water by-pass hose.
  
  Fig 3: Locating No. 2 Water By-Pass Hose
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
6. Disconnect the throttle control motor connector.
7. Disconnect the throttle position sensor connector.
  
  Fig 4: Locating Throttle Position Sensor Connector
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
8. Disconnect the 3 wire harness clamps.
9. Disconnect the connector clamp.
10. Remove the bolt and harness clamp bracket.
  
  Fig 5: Locating Wire Harness Clamps
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
11. Remove the No. 1 fuel vapor feed hose from the hose clamp.
12. Remove the 3 bolts, 2 nuts and intake manifold.
  
  Fig 6: Locating Intake Manifold Bolts And Nuts
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
13. Remove the gasket from the cylinder head.
  
  Fig 7: Locating Cylinder Head Gasket
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
REMOVE KNOCK SENSOR
1. Disconnect the knock sensor connector.
2. Remove the nut and sensor.
  
  Fig 8: Locating Knock Sensor Connector Nut
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002