Toyota RAV4 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)
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
...
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:
Components
...
Data list / active test
Read data list
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.
Connect the intelligent tester (with can vim) to the
dlc3 ...
Basic audio operations
Basic audio operations and functions common to each mode are
explained in this section.
Operating the audio system
Press this knob to turn the
audio system on and off, and
turn it to adjust the volume.
Press this button to eject a disc
Insert a disc into the disc slot
Press to pa ...