Toyota RAV4 (XA40) 2013-2018 Service Manual: 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 diagram
Inspection procedure
Inspection procedure
- Perform active test by intelligent tester (a/c mag clutch)
- Connect the intelligent tester (with can vim) to 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 compressor magnetic relay operates.
- Inspect fuse (ecu-ig1)
- Remove the ecu-ig1 fuse from the instrument panel junction block.
- Measure the resistance of the fuse.
Standard resistance:
below 1
- Inspect magnetic clutch relay (marking: mg clt)
- Remove the magnetic clutch relay from the engine room no. 1 Relay block.
- Measure the resistance of the relay.
Standard resistance
- Check wire harness (air conditioning amplifier - battery)
- Disconnect the e36 amplifier connector.
- Measure the voltage of the wire harness side connector.
Standard voltage 
- Check air conditioning amplifier (mgc voltage)
- Remove the air conditioning amplifier with its connectors still connected.
- Measure the voltage of the connector.
Standard voltage 
- Check magnetic clutch
- Disconnect the b47 magnetic clutch connector.
- Connect the battery's positive (+) lead to terminal 3 of the magnetic clutch and the negative (-) lead to the body ground.
Ok: magnetic clutch is engaged.
Repair or replace wire harness (magnetic clutch - ecu-ig1)
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
...
Ig power source circuit
Description
This is the main power source supplied to the air conditioning amplifier when
the ignition switch is on.
This power source is used for operating components, such as the air condition ...
Other materials:
Handling of hose clamps
Before removing the hose, check the clamp position
so that it can be reinstalled in the same position.
Replace any deformed or dented clamps with new
ones.
When reusing a hose, attach the clamp on the
clamp track portion of the hose.
For a spring type clamp, you may want to spread ...
Power outlets
The power outlet can be used for 12 v accessories that run on
less than 10 a.
Open the lid.
The power outlets can be used when
Vehicles without a smart key system
The engine switch is in the “acc” or “on” position.
Vehicles with a smart key system
The engine switch is in ...
Position initialization incomplete
Description
This dtc is output when the sliding roof drive gear (sliding roof ecu) has
not been initialized.
Wiring diagram
Refer to dtc b2341 (see page rf-11).
Inspection procedure
Initialize sliding roof drive gear sub-assembly (sliding roof ecu)
Check that the sliding roof ...
