Toyota RAV4 manuals

Toyota RAV4 (XA40) 2013-2018 Service Manual: Evaporator temperature sensor circuit

Toyota RAV4. Evaporator temperature sensor circuit


Description

The no. 1 Cooler thermistor (evaporator temperature sensor) is installed on the evaporator in the air conditioning unit to detect the temperature of the cooled air that has passed through the evaporator and to control the air conditioner. It sends signals to the air conditioning amplifier. The signals change in accordance with the resistance of the no. 1 Cooler thermistor (evaporator temperature sensor). As the temperature decreases, the resistance increases. As the temperature increases, the resistance decreases. The air conditioning amplifier applies a voltage (5 v) to the no. 1 Cooler thermistor (evaporator temperature sensor) and reads voltage changes as changes in the resistance of the no. 1 Cooler thermistor (evaporator temperature sensor). This sensor is used for frost prevention.

Toyota RAV4. Evaporator temperature sensor circuit


Wiring diagram

Toyota RAV4. Evaporator temperature sensor circuit


Inspection procedure

  1. Read value of intelligent tester (evap fin temp)

  1. Connect the intelligent tester (with can vim) to the dlc3.
  2. Turn the ignition switch on and turn the intelligent tester main switch on.
  3. Select the item below in the data list, and read the value displayed on the intelligent tester.

Toyota RAV4. Read value of intelligent tester (evap fin temp)


Ok: the display is as specified in the normal condition column.

Toyota RAV4. Read value of intelligent tester (evap fin temp)



  1. Inspect no. 1 Cooler thermistor (evaporator temperature sensor)

Toyota RAV4. Inspect no. 1 Cooler thermistor (evaporator temperature sensor)


  1. Remove the no. 1 Cooler thermistor.
  2. Measure the resistance of the thermistor.

Standard resistance


Notice:

Hint:

As the temperature increases, the resistance decreases (see the graph).



  1. Check wire harness (no. 1 Cooler thermistor - air conditioning amplifier)

Toyota RAV4. Check wire harness (no. 1 Cooler thermistor - air conditioning amplifier)


  1. Disconnect the e33 no. 1 Cooler thermistor connector.
  2. Disconnect the e36 amplifier connector.
  3. Measure the resistance of the wire harness side connectors.

Standard resistance




Replace air conditioning amplifier

Ambient temperature sensor circuit
Description The ambient temperature sensor is installed in the front part of the condenser to detect the ambient temperature and control the air conditioner. The sensor is connected to the c ...

Compressor lock sensor circuit
Description This sensor sends 1 pulse per engine revolution to the air conditioning amplifier. If the ratio of the compressor speed divided by the engine speed is smaller than a predetermined ...

Other materials:

Underdrive planetary gear
Components Disassembly Remove underdrive planetary gear preload (see page ax-240) Remove underdrive input shaft nut Sst 09930-00010 (09931-00010, 09931-00020), 09387-00050, 09564-16020 Using sst, loosen the staked part of the nut. Clamp the underdrive planetary gear in ...

List screen operation
When a list screen is displayed, use the appropriate buttons to scroll through the list. How to scroll   Select to scroll to the next or previous page. Appears to the right of titles, the complete titles are too long for the display. Select this button to scroll the title. Turn th ...

Bottle holders
Front Rear Caution Items unsuitable for the bottle holder Do not place anything other than a bottle in the bottle holders. Other items may be thrown out of the holders in the event of an accident or sudden braking and cause injury. Notice Items that should not be stowed in the bott ...

В© 2011-2025 Copyright www.trav4.net