Knock Sensor: Removal

REMOVE CYLINDER HEAD SUB-ASSEMBLY (See REMOVAL )
DISCONNECT HEATER WATER INLET HOSE A
1. Disconnect the heater water inlet hose A.
  
  Fig 1: Identifying Heater Water Inlet Hose A
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
REMOVE WATER OUTLET PIPE NO.1
1. Remove the 4 wire harness clamps [A].
2. Remove the 3 bolts [B] and the water outlet pipe.
  
  Fig 2: Locating Wire Harness Clamps & Water Outlet Pipe Bolts
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
REMOVE KNOCK SENSOR
1. Disconnect the 2 knock sensor connectors.
2. Remove the 2 bolts and the 2 knock sensors.
  
  Fig 3: Identifying Knock Sensor Connectors & Knock Sensors With Bolts
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002