Toyota RAV4 manuals

Toyota RAV4 Service Manual: Room temperature sensor circuit

Toyota RAV4. Room temperature sensor circuit


Description

The room temperature sensor is installed in the instrument panel to detect the room temperature and control the heater and air conditioner auto mode. The resistance of the room temperature sensor changes in accordance with the room temperature. 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 room temperature sensor and reads voltage changes as changes in the resistance of the room temperature sensor.

Toyota RAV4. Room temperature sensor circuit


Wiring diagram

Toyota RAV4. Wiring diagram


Inspection procedure

  1. Read value of intelligent tester (room 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 (room temp)


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

Toyota RAV4. Read value of intelligent tester (room temp)




  1. Inspect cooler thermistor (room temperature sensor)

Toyota RAV4. Inspect cooler thermistor (room temperature sensor)


  1. Remove the room temperature sensor.
  2. Measure the resistance of the sensor.

Standard resistance


Notice:

Hint:

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



  1. Check wire harness (room temperature sensor - air conditioning amplifier)

Toyota RAV4. Check wire harness (room temperature sensor - air conditioning amplifier)


  1. Disconnect the e21 sensor connector.
  2. Disconnect the e37 amplifier connector.
  3. Measure the resistance of the wire harness side connectors.

Standard resistance




Replace air conditioning amplifier assembly

Diagnostic trouble code chart (2006/01- )
Hint: When the air conditioning system functions properly, dtc b1400/00 is output. Hint: *1: Dtc b1422/22 (compressor lock sensor circuit) is indicated only for a currently occurring malf ...

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 ...

Other materials:

How to use this manual
General information General description This manual is written in accordance with sae j2008. Diagnosis Removing / installing, replacing, disassembling / reassembling, checking and adjusting Final inspection The following procedures are omitted from this manual. Howeve ...

Setup menu
You can adjust the audio system to your desired settings. Display “setup” screen Press the “setup” button to display the “setup” screen. Select to adjust the settings for operation sounds, screen animation, etc. Select to display the voice settings screen. Select to adjus ...

Diagnostic trouble code chart
Hint: If no abnormality is found when inspecting parts, check the skid control ecu and check for poor contact at the ground points. If a dtc is displayed during the dtc check, check the circuit for the dtc listed in the table below. For details of each dtc, refer to the page indicated. ...

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