Knock Sensor: Inspection

REMOVE ENGINE COVER
Remove the 4 nuts and engine cover.
REMOVE PS PUMP REAR STAY
REMOVE KNOCK SENSOR 1
1. Disconnect the knock sensor connector.
2. Using SST, remove the knock sensor.
  SST 09816-30010
  
  Fig 1: Removing Knock Sensor Using SST
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
REMOVE OIL DIPSTICK AND GUIDE FOR A/T (See REMOVAL )
REMOVE STARTER (See STARTER )
REMOVE KNOCK SENSOR 2 (See 2 )
INSPECT KNOCK SENSORS
Using an ohmmeter, check that there is no continuity between the terminal and body.

Fig 2: Checking There Is No Continuity Between Terminal & Body
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If there is continuity, replace the sensor.
REINSTALL KNOCK SENSORS.
1. Using SST, install the knock sensor.
  SST 09816-30010
  
  Torque: 44 N.m (450 kgf.Cm, 33 ft.lbf)
2. Connect the knock sensor connector.
REINSTALL STARTER (See STARTER )
REINSTALL OIL DIPSTICK AND GUIDE FOR A/T
NOTE: Use a new O-ring.
REINSTALL PS PUMP REAR STAY
Torque: 39.2 N.m (400 kgf.Cm, 29 ft.lbf)
REINSTALL ENGINE COVER
Reinstall the engine cover with the 4 nuts.