Toyota RAV4 manuals

Toyota RAV4 Service Manual: Blower motor circuit

Description

When the heater control (blower switch) is set to position 1 or higher, the contact of the htr relay is closed, current flows to the blower motor, and the blower motor operates. The blower motor speed can be changed by exchanging the ground and the blower resistor circuit with the heater control (blower switch).

Wiring diagram

Toyota RAV4. Blower motor circuit


Inspection procedure

  1. Inspect fuse (htr)

  1. Remove the htr fuse from the engine room no. 2 Relay block.
  2. Measure the resistance of the fuse.

Standard resistance: below 1




  1. Inspect heater relay (marking: htr)

Toyota RAV4. Inspect heater relay (marking: htr)


  1. Remove the heater relay from the instrument panel junction block.
  2. Measure the resistance of the relay.

Standard resistance




  1. Inspect blower motor

Toyota RAV4. Inspect blower motor


  1. Disconnect the e54 motor connector.
  2. Connect the positive (+) lead from the battery to terminal 2 and the negative (-) lead to terminal 1, then check that the blower motor operates smoothly.

Ok: the blower motor operates smoothly.

  1. Measure the current.

Standard current 




  1. Check wire harness (heater control (blower switch) - battery)

  1. Disconnect the e24 heater control connector.
  2. Measure the voltage of the wire harness side connector.

Standard voltage


Toyota RAV4. Check wire harness (heater control (blower switch) - battery)




  1. Inspect heater control (blower switch)

Toyota RAV4. Inspect heater control (blower switch)


  1. Remove the heater control.
  2. Measure the resistance of the switch.

Standard resistance




  1. Inspect blower resistor

Toyota RAV4. Inspect blower resistor


  1. Remove the blower resistor.
  2. Measure the resistance of the resistor.

Standard resistance




  1. Check wire harness (heater control (blower switch) - blower resistor)

Toyota RAV4. Check wire harness (heater control (blower switch) - blower resistor)


  1. Disconnect the e24 heater control connector.
  2. Disconnect the e55 blower resistor connector.
  3. Measure the resistance of the wire harness side connectors.

Standard resistance




  1. Check wire harness (blower resistor - blower motor)

Toyota RAV4. Check wire harness (blower resistor - blower motor)


  1. Disconnect the e55 blower resistor connector.
  2. Disconnect the e54 motor connector
  3. Measure the resistance of the wire harness side connectors.

Standard resistance




  1. Check wire harness (blower motor - body ground)

Toyota RAV4. Check wire harness (blower motor - body ground)


  1. Disconnect the e54 motor connector.
  2. Measure the resistance of the wire harness side connector.

Standard resistance


  1. Measure the voltage of the wire harness side connector.

Standard voltage




  1. Check wire harness (air conditioning amplifier - battery)

Toyota RAV4. Check wire harness (air conditioning amplifier - battery)


  1. Disconnect the e36 amplifier connector.
  2. Measure the voltage of the wire harness side connector.

Standard voltage




  1. Check wire harness (air conditioning amplifier - body ground)

Toyota RAV4. Check wire harness (air conditioning amplifier - body ground)


  1. Disconnect the e36 amplifier connector.
  2. Measure the resistance of the wire harness side connector.

Standard resistance




Proceed to next circuit inspection shown in problem symptoms table

Multiplex communication circuit
Description The air conditioning amplifier communicates data with the ecm and combination meter through the can communication system. Wiring diagram Inspection procedure Check dt ...

Compressor circuit
Description When the a/c switch is turned on, the magnetic clutch on signal is sent from the air conditioning amplifier. Then the mg clt relay turns on to operate the magnetic clutch. Wiring diag ...

Other materials:

Definition of terms
Terms Definition Monitor description Description of what ecm monitors and how detects malfunctions (monitoring purpose and details). Related dtcs Group of diagnostic trouble codes that are output by ecm based on same malfunction detection logic. ...

Front passenger side seat belt warning light malfunction
Description When the ignition switch is on, the center airbag sensor transmits front seat inner belt status signals to the combination meter through the can bus line. If the front passenger seat belt is not fastened, the heater control panel (automatic a/c) or clock (manual a/c) blinks the fr ...

Installation
Caution: Be sure to read the precautionary notices concerning the srs airbag system before servicing it (see page rs-1). Install front passenger airbag assembly Attach the rear side hook of the front passenger airbag to the rear side airbag door. Bend the front side hook so that it a ...

В© 2011-2022 Copyright www.trav4.net