Knock Sensor: Removal

DISCHARGE FUEL SYSTEM PRESSURE (See DISASSEMBLY )
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.
DRAIN ENGINE COOLANT (See COOLANT )
REMOVE INTAKE MANIFOLD ASSEMBLY
1. Remove the intake manifold (see REMOVAL ).
REMOVE KNOCK SENSOR
1. Disconnect the 2 knock sensor connectors.
2. Remove the 2 nuts and 2 knock sensors.
  
  Fig 1: Identifying Knock Sensors
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002