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:

Replacement
Replace timing chain cover oil seal Hint: There are 2 methods to replace the oil seal. If the timing chain cover is removed from the cylinder block: Using a screwdriver and hammer, tap out the oil seal. Apply multi-purpose grease to the lip of a new oil seal. Notice: ...

Spiral cable
Components Removal Caution: Be sure to read the precautionary notices concerning the srs airbag system before servicing it (see page rs-1). Disconnect cable from negative battery terminal Caution: Wait at least 90 seconds after disconnecting the cable from the negative (-) battery ...

Reducing fuel consumption
Vehicle features and options This chapter describes all standard, country-specific and optional features offered with the series. It also describes features and functions that are not necessarily available in your vehicle, e.g., due to the selected options or country versions. This also applies to ...

В© 2011-2023 Copyright www.trav4.net