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:
Front seatback heater
Inspection
Inspect front seatback heater assembly
lh
Measure the resistance of the seatback heater.
Standard resistance
If the result is not as specified, replace the seatback
heater assembly
Inspect front seatback heater assembly
rh
Hint:
Use the same procedures desc ...
Instrument cluster
For the purpose of explanation, the following illustrations display all
warning lights and indicators illuminated.
â– With 7-inch multi-information display
The display of the speedometer can be selected from two types,
analog or digital.
When analog speedometer is displayed
The units used on the m ...
Dtc check / clear
Check dtc (using sst (check wire))
Check the dtcs (present trouble code).
Turn the ignition switch on, and wait for
approximately 60 seconds.
Using sst, connect terminals 13(tc) and 4(cg)
of the dlc3.
Sst 09843-18040
Notice:
Connect the terminals to the correct
positio ...
