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:

How to proceed with troubleshooting
Hint: Use the procedure to troubleshoot the power door lock control system. *: Use the intelligent tester. Vehicle brought to workshop Inspect battery voltage Standard voltage: 11 to 14 v If the voltage is below 11 v, recharge or replace the battery before proceeding. ...

Rear airbag sensor
Components On-vehicle inspection Check rear airbag sensor (vehicle not involved in collision) Perform a diagnostic system check (see page rs- 49). Check rear airbag sensor (vehicle involved in collision and airbag has not deployed) Perform a diagnostic system check ...

Terminals of ecu
Skid control ecu Hint: *1: W/ 16-inch disc *2: W/ downhill assist control *3: For 2wd (w/ auto lsd) Check skid control ecu Disconnect the a19 ecu connector. Measure the voltage and resistance of the wire harness side connector. Hint: The voltage cannot be measured ...

В© 2011-2019 Copyright www.trav4.net