Air Conditioning System (For Automatic Air Conditioning System) Compressor Circuit

Heater & Air Conditioning System. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35
Air Conditioning. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

PERFORM ACTIVE TEST USING INTELLIGENT TESTER (A/C MAG CLUTCH)

INSPECT FUSE (ECU-IG1)

INSPECT MAGNETIC CLUTCH RELAY (Marking: MG CLT)

CHECK WIRE HARNESS (AIR CONDITIONING AMPLIFIER - BATTERY)

CHECK AIR CONDITIONING AMPLIFIER (MGC VOLTAGE)

CHECK MAGNETIC CLUTCH

AIR CONDITIONING SYSTEM (for Automatic Air Conditioning System) - 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


Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System).Air Conditioning System (For Automatic Air Conditioning System) Compressor Circuit


INSPECTION PROCEDURE

1.PERFORM ACTIVE TEST USING INTELLIGENT TESTER (A/C MAG CLUTCH)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch on (IG) and turn the intelligent tester main switch ON.

  1. Select the item below in the ACTIVE TEST and then check that the compressor magnetic relay operates.

    Air conditioning amplifier
    Item
    		Test Details / Display (Range)
    		Diagnostic Note
    Magnetic Clutch Relay
    		Magnetic clutch relay / OFF, ON
    		Operating sound can be heard


NG
Go to step 2
OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

2.INSPECT FUSE (ECU-IG1)

  1. Remove the ECU-IG1 fuse from the instrument panel junction block.

  1. Measure the resistance of the fuse.

    Standard resistance:
    Below 1 Ω


NG
REPLACE FUSE
OK


3.INSPECT MAGNETIC CLUTCH RELAY (Marking: MG CLT)


    Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System).Air Conditioning System (For Automatic Air Conditioning System) Compressor Circuit

  1. Remove the magnetic clutch relay from the engine room No. 1 relay block.

  1. Measure the resistance of the relay.

    Standard resistance:
    Tester Connection
    		Specified Condition
    3 - 5
    		10 kΩ or higher
    3 - 5
    		Below 1 Ω
    (when battery voltage is applied to terminals 1 and 2)


NG
REPLACE MAGNETIC CLUTCH RELAY
OK


4.CHECK WIRE HARNESS (AIR CONDITIONING AMPLIFIER - BATTERY)


    Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System).Air Conditioning System (For Automatic Air Conditioning System) Compressor Circuit

  1. Disconnect the E41 amplifier connector.

  1. Measure the voltage of the wire harness side connector.

    Standard voltage:
    Tester Connection
    		Condition
    		Specified Condition
    E41-20 (MGC) - Body ground
    		Ignition switch on (IG)
    		10 to 14 V
    E41-20 (MGC) - Body ground
    		Ignition switch Off
    		Below 1 V


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


5.CHECK AIR CONDITIONING AMPLIFIER (MGC VOLTAGE)


    Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System).Air Conditioning System (For Automatic Air Conditioning System) Compressor Circuit

  1. Remove the air conditioning amplifier with its connectors still connected.

  1. Measure the voltage of the connector.

    Standard voltage:
    Tester Connection
    		Condition
    		Specified Condition
    E41-20 (MGC) - Body ground
    		Ignition switch ON
    A/C switch OFF
    		10 to 14 V
    E41-20 (MGC) - Body ground
    		Ignition switch ON
    A/C switch ON
    		Below 1.5 V


NG
REPLACE AIR CONDITIONING AMPLIFIER
OK


6.CHECK MAGNETIC CLUTCH


    Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System).Air Conditioning System (For Automatic Air Conditioning System) Compressor Circuit

  1. Disconnect the B82 magnetic clutch connector.

  1. 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.


NG
REPLACE MAGNETIC CLUTCH
OK

REPAIR OR REPLACE WIRE HARNESS (MAGNETIC CLUTCH - ECU-IG1)