Knock Sensor: Inspection

WARNING: This page is about a different car, the 2006 Lexus IS 350. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT KNOCK SENSOR
1. Measure the resistance between the terminals.
  Standard resistance: 120 to 280 kΩ at 20°C (68°F)
  
  If the result is not as specified, replace the sensor.
  
  Fig 1: Measuring Resistance Between Knock Sensor Terminals
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002