Evaporator Temperature Sensor: Inspection

WARNING: This page is about a different car, the 2004 Lexus IS 300. However, it is still accessible from the selected car via links, so may be relevant.

REMOVE LOWER FINISH PANEL (See REMOVAL )
REMOVE EVAPORATOR TEMPERATURE SENSOR
1. Disconnect the connector.
2. Using a screwdriver, pull out the sensor with bracket plate.
  HINT:
  
  Tape the screwdriver tip before use.
  
  Fig 1: Removing Evaporator Temperature Sensor With Bracket Plate
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Release the 2 claws and remove the sensor from bracket plate.
  
  Fig 2: Removing Evaporator Temperature Sensor From Bracket Plate
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT EVAPORATOR TEMPERATURE SENSOR RESISTANCE
1. Place the sensor in cold water, and while changing the temperature of the water, measure resistance at the connector and at the same time, measure temperature of the water with a thermometer.
  
  Fig 3: Inspecting Evaporator Temperature Sensor Resistance
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Compare the 2 readings on Fig 4 .
  If resistance value is not as specified, replace the sensor.
  
  Fig 4: Evaporator Temperature Sensor Resistance Graph
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSTALL EVAPORATOR TEMPERATURE SENSOR
1. Install the sensor in bracket plate and 2 claws.
  
  Fig 5: Installing Sensor In Bracket Plate & 2 Claws
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Push in the sensor with the bracket plate.
3. Connect the connector.
INSTALL LOWER FINISH PANEL (See INSTALLATION )

Fig 6: Installing Evaporator Temperature Sensor
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002