Toyota RAV4 manuals

Toyota RAV4 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).



Replace air conditioning harness assembly

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 ...

Solar sensor circuit (passenger side)
Description The solar sensor, which is installed on the upper side of the instrument panel, detects sunlight and controls the air conditioning auto mode. The output voltage from the solar se ...

Other materials:

Cd player operation
Insert disc or select “cd” on the audio source selection screen with a disc inserted to begin listening to a cd. Audio control screen Pressing the “audio” button displays the audio control screen from any screens of the selected source. Audio source selection screen appears Displ ...

Automatic transaxle assembly
Components Removal Remove engine assembly with transaxle Remove the engine with transaxle (see page em- 98). Drain automatic transaxle fluid Remove the drain plug and gasket, and drain atf. Install a new gasket and the drain plug. Torque: 47 n*m (479 kgf*cm, 35 ft. ...

Diagnosis system
Check dlc3 The ecm uses iso 15765-4 for communication. The terminal arrangement of the dlc3 complies with sae j1962 and matches the iso 15765-4 format. If the result is not as specified, the dlc3 may have a malfunction. Repair or replace the harness and connector. Hint: Conn ...

© 2011-2019 Copyright www.trav4.net