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
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 ...
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
Notice:
Dtcs for the can communication system are as
follows: u0073, u0100, u0105, u0121, u0122, u0123,
u0124, u0126, u0129, c1280, c1296, c1297, and
b1499.
Refer to the troubleshooting procedures of each
system if dtcs regarding the can communication
system are not output.
Turn th ...
On-vehicle inspection
Check ignition coil assembly and perform spark test
Notice:
in this section, the terms "cold" and "hot" refer to
the temperature of the coils. "Cold" means
approximately -10 to 50°c (14 to 122°f). "Hot" means
approximately 50 to 100°c (122 to 212 ...
Brake master cylinder
Components
On-vehicle inspection
Check brake fluid level warning switch
Remove the reservoir filler cap and strainer.
Disconnect the brake fluid level warning switch
connector.
Measure the resistance of the switch.
Hint:
There is a float inside the reservoir. Its positio ...