Toyota RAV4 (XA40) 2013-2018 Service Manual: Blower motor circuit
Description
The blower motor is operated by signals from the air conditioning amplifier. Blower motor speed signals are transmitted in accordance with changes in the duty ratio.
Wiring diagram
Inspection procedure
- Perform active test by intelligent tester (blower motor)
- Connect the intelligent tester to (with can vim) the dlc3.
- Turn the ignition switch on and turn the intelligent tester main switch on.
- Select the item below in the active test, and then check that the blower motor operates.
- Inspect fuse (htr)
- Remove the htr h-fuse from the engine room no. 2 Relay block.
- Measure the resistance of the h-fuse.
Standard resistance:
below 1 
- Check wire harness (blower motor - body ground)
- Disconnect the e53 motor connector.
- Measure the resistance of the wire harness side connector.
Standard resistance
- Check wire harness (blower motor - battery)
- Disconnect the e53 motor connector.
- Measure the voltage of the wire harness side connector.
Standard voltage
- Check blower w/ fan motor sub-assembly
- Disconnect the e37 amplifier connector.
- Connect the e53 motor connector.
- Measure the voltage of the connector.
Standard voltage
- Check wire harness (air conditioning amplifier - body ground)
- Disconnect the e37 amplifier connector.
- Measure the voltage of the wire harness side connector
Standard voltage
- Check air conditioning amplifier
- Remove the air conditioning amplifier with its connectors still connected.
- Check the waveform of the amplifier connector.
Ok: waveform is as shown in the illustration.
Hint:
The waveform varies with the blower level.
Replace blower w/ fan motor sub-assembly
Air conditioning control panel does not operate
Description
This circuit consists of the air conditioning control and the air
conditioning amplifier. When the air
conditioning control is operated, signals are transmitted to the air
conditioni ...
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:
Ecm communication stop mode (2006/01- )
Description
Wiring diagram
Inspection procedure
Notice:
Turn the ignition switch off before measuring the resistances of the
main wire and branch
wire.
After the ignition switch is turned off, check that the key reminder
warning system and light
reminder warning system ...
Data list / active test
Hint:
Using the intelligent tester's data list allows switch, sensor,
actuator and other item values to be read without removing
any parts. Reading the data list early in troubleshooting is
one way to save time.
Data list for occupant classification ecu
Connect the intelligent test ...
Battery current sensor
On-vehicle inspection
Check battery current sensor assembly
Measure the resistance of the sensor.
Standard resistance
If the result is not as specified, replace the sensor
assembly.
Measure the resistance of the sensor.
Standard resistance
If the result is not as specified, ...
