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

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Other materials:

Inspection
Inspect engine coolant temperature sensor Measure the resistance of the sensor. Standard resistance Notice: If checking the sensor in water, be careful not to allow water to contact the terminals. After checking, wipe the water off the sensor. If the result is not as specified, ...

Rear seats
Adjustment procedure Pull up the lever. Then lean back to the desired angle and release the lever. When a person sits in the rear center position, align all seatbacks at the same angle. Folding down the rear seatbacks Before folding down the rear seatbacks Stow the rear center seat bel ...

Installation
Install ignition switch assembly Install the ignition switch with the 2 screws. Install the ignition key cylinder light connector. Install the ignition switch connector. Install steering column cover lower Attach the 4 claws to install the steering column l ...

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