Air Conditioning: Thermistor: Inspection

REMOVE BLOWER UNIT (See REMOVAL )
REMOVE THERMISTOR
1. Disconnect the thermistor connector.
2. Disconnect the connector clamp.
3. Release the 4 claws and remove the harness.
4. Using a screwdriver, pull out the thermistor from the A/C unit.
  HINT:
  
  Tape the screwdriver tip before use.
  
  Fig 1: Releasing Harness Claws & Removing Thermistor From A/C Unit
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
5. Release the 2 claws and remove the thermistor from the bracket plate.
  
  Fig 2: Releasing Claws & Removing Thermistor From Bracket Plate
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT THERMISTOR
1. Place the thermistor in cold water, and while changing the temperature of water, measure resistance at the connector and at the same time, measure temperature of water with a thermometer.
  
  Fig 3: Placing Thermistor In Cold Water & Measuring Resistance
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Compare the 2 readings on the graphs.
  If resistance is not as specified, replace the thermistor.
  
  Fig 4: Thermistor Resistance Graph
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
REINSTALL THERMISTOR
1. Install the thermistor to the bracket plate.
2. Install the thermistor to the A/C unit case.
3. Connect the connector clamp.
4. Connect the thermistor connector.
REINSTALL BLOWER UNIT (See REMOVAL )