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:
Diagnosis system
Description
Power door lock control system data can be read in the
data link connector 3 (dlc3) of the vehicle. When the
system seems to be malfunctioning, use the intelligent
tester to check for malfunctions and perform repairs.
Check dlc3
The ecu uses iso 15765-4 for communi ...
Light bulbs
You may replace the following bulbs by yourself. The difficulty
level of replacement varies depending on the bulb. If necessary
bulb replacement seems difficult to perform, contact your
toyota dealer.
For more information about replacing other light bulbs, contact
your toyota dealer.
Prepari ...
Location of the interior lights
Rear interior light
Front interior lights/personal lights
Open tray lights (if equipped)*
Footwell lights (if equipped)*
Front cup holder lights (if equipped)*
*: These lights turn on when a door is unlocked.
When the shift lever is in a position other than P, the brightness of these
ligh ...
