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


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK VEHICLE TYPE

INSPECT MAGNET CLUTCH RELAY (A/C COMP)

INSPECT COOLER COMPRESSOR ASSEMBLY

INSPECT MAGNET CLUTCH ASSEMBLY

CHECK HARNESS AND CONNECTOR (ENGINE ROOM NO. 1 RELAY BLOCK, JUNCTION BLOCK - BATTERY)

CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - BATTERY)

CHECK HARNESS AND CONNECTOR (ENGINE ROOM NO. 1 RELAY BLOCK, JUNCTION BLOCK - COOLER COMPRESSOR)

CHECK ENGINE ROOM NO. 1 RELAY BLOCK, JUNCTION BLOCK (A/C COMP RELAY)

INSPECT COOLER COMPRESSOR ASSEMBLY

INSPECT MAGNET CLUTCH ASSEMBLY

CHECK HARNESS AND CONNECTOR (ENGINE ROOM NO. 1 RELAY BLOCK, JUNCTION BLOCK - BATTERY)

CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - BATTERY)

CHECK HARNESS AND CONNECTOR (ENGINE ROOM NO. 1 RELAY BLOCK, JUNCTION BLOCK - COOLER COMPRESSOR)

AIR CONDITIONING SYSTEM (for Automatic Air Conditioning System) - Air Conditioning Compressor Magnetic Clutch Circuit


DESCRIPTION

When the air conditioning amplifier assembly is turned ON, a magnet clutch assembly ON signal is sent from the MGC terminal of the air conditioning amplifier assembly. Then, the A/C COMP relay turns on to operate the magnet clutch assembly.

WIRING DIAGRAM


Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System).Air Conditioning System (For Automatic Air Conditioning System) Air Conditioning Compressor Magnetic Clutch Circuit


Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System).Air Conditioning System (For Automatic Air Conditioning System) Air Conditioning Compressor Magnetic Clutch Circuit


INSPECTION PROCEDURE

NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
1.CHECK VEHICLE TYPE

  1. Check the vehicle type.

    Result
    Result
    		Proceed to
    w/o Urea SCR System
    		A
    w/ Urea SCR System
    		B


B
Go to step 8
A


2.INSPECT MAGNET CLUTCH RELAY (A/C COMP)


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155

  1. Remove the A/C COMP relay from the engine room No. 1 relay block, junction block.

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    3 - 5
    		Battery voltage is not applied to terminals 1 and 2
    		10 kΩ or higher
    Battery voltage is applied to terminals 1 and 2
    		Below 1 Ω


NG
REPLACE MAGNET CLUTCH RELAY (A/C COMP)
OK


3.INSPECT COOLER COMPRESSOR ASSEMBLY


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System).Air Conditioning System (For Automatic Air Conditioning System) Air Conditioning Compressor Magnetic Clutch Circuit

  1. for 1GR-FE:
    Remove the cooler compressor assembly (LandCruiser RM00000180106QX.html).

  1. for 1KD-FTV:
    Remove the cooler compressor assembly (LandCruiser RM000000UAV00DX.html).

  1. for 2TR-FE:
    Remove the cooler compressor assembly (LandCruiser RM0000012JZ03VX.html).

  1. Disconnect the A magnet clutch connector.

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    3 (MG+) - A-1
    		Always
    		Below 1 Ω
    3 (MG+) - Body ground
    		Always
    		10 kΩ or higher
    Result
    Result
    		Proceed to
    OK
    		A
    NG (for 1GR-FE)
    		B
    NG (for 1KD-FTV)
    		C
    NG (for 2TR-FE)
    		D


B
REPLACE COOLER COMPRESSOR ASSEMBLY (LandCruiser RM00000180106QX.html)

C
REPLACE COOLER COMPRESSOR ASSEMBLY (LandCruiser RM000000UAV00DX.html)

D
REPLACE COOLER COMPRESSOR ASSEMBLY (LandCruiser RM0000012JZ03VX.html)
A


4.INSPECT MAGNET CLUTCH ASSEMBLY


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System).Air Conditioning System (For Automatic Air Conditioning System) Air Conditioning Compressor Magnetic Clutch Circuit

  1. Reconnect the A magnet clutch connector.

  1. Apply battery voltage to the magnet clutch assembly and check the operation of the magnet clutch assembly.

    OK:
    Measurement Condition
    		Specified Condition
    Battery positive (+) → Terminal 3 (MG+)
    Battery negative (-) → Body ground
    		Magnet clutch assembly operating sound can be heard, and magnetic clutch hub and rotor lock.
    Result
    Result
    		Proceed to
    OK
    		A
    NG (for 1GR-FE)
    		B
    NG (for 1KD-FTV)
    		C
    NG (for 2TR-FE)
    		D


B
REPLACE MAGNET CLUTCH ASSEMBLY (LandCruiser RM0000016AL09XX.html)

C
REPLACE MAGNET CLUTCH ASSEMBLY (LandCruiser RM000000UAW00AX.html)

D
REPLACE MAGNET CLUTCH ASSEMBLY (LandCruiser RM0000016AL09YX.html)
A


5.CHECK HARNESS AND CONNECTOR (ENGINE ROOM NO. 1 RELAY BLOCK, JUNCTION BLOCK - BATTERY)


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System).Air Conditioning System (For Automatic Air Conditioning System) Air Conditioning Compressor Magnetic Clutch Circuit

  1. Remove the A/C COMP relay from the engine room No. 1 relay block, junction block.

  1. Measure the voltage according to the value(s) in the table below.

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    A/C COMP relay terminal 1 - Body ground
    		Ignition switch ON
    		11 to 14 V
    A/C COMP relay terminal 5 - Body ground
    		Always
    		11 to 14 V
    Text in Illustration
    *1
    		A/C COMP Relay
    *a
    		Component without relay installed
    (Engine Room No. 1 Relay Block, Junction Block)


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


6.CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - BATTERY)


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System).Air Conditioning System (For Automatic Air Conditioning System) Air Conditioning Compressor Magnetic Clutch Circuit

  1. Disconnect the G25 amplifier connector.

  1. Measure the voltage according to the value(s) in the table below.

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    G25-20 (MGC) - Body ground
    		Ignition switch off
    		Below 1 V
    G25-20 (MGC) - Body ground
    		Ignition switch ON
    		11 to 14 V
    Text in Illustration
    *a
    		Front view of wire harness connector
    (to Air Conditioning Amplifier Assembly)


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


7.CHECK HARNESS AND CONNECTOR (ENGINE ROOM NO. 1 RELAY BLOCK, JUNCTION BLOCK - COOLER COMPRESSOR)

  1. Remove the A/C COMP relay from the engine room No. 1 relay block, junction block.

  1. Disconnect the C39 compressor connector.

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    A/C COMP relay terminal 3 - C39-3 (MG+)
    		Always
    		Below 1 Ω
    C39-3 (MG+) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE (LandCruiser RM0000045E302NX.html)

8.CHECK ENGINE ROOM NO. 1 RELAY BLOCK, JUNCTION BLOCK (A/C COMP RELAY)


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System).Air Conditioning System (For Automatic Air Conditioning System) Air Conditioning Compressor Magnetic Clutch Circuit

  1. Remove the engine room No. 1 relay block, junction block.

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    1J-9 - 1K-1
    		Battery voltage is not applied to 1K-12 and 1K-13
    		10 kΩ or higher
    Battery voltage is applied to 1K-12 and 1K-13
    		Below 1 Ω


NG
REPLACE ENGINE ROOM NO. 1 RELAY BLOCK, JUNCTION BLOCK
OK


9.INSPECT COOLER COMPRESSOR ASSEMBLY


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System).Air Conditioning System (For Automatic Air Conditioning System) Air Conditioning Compressor Magnetic Clutch Circuit

  1. Remove the cooler compressor assembly (LandCruiser RM00000180106SX.html).

  1. Disconnect the A magnet clutch connector.

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    3 (MG+) - A-1
    		Always
    		Below 1 Ω
    3 (MG+) - Body ground
    		Always
    		10 kΩ or higher


NG
REPLACE COOLER COMPRESSOR ASSEMBLY (LandCruiser RM00000180106SX.html)
OK


10.INSPECT MAGNET CLUTCH ASSEMBLY


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System).Air Conditioning System (For Automatic Air Conditioning System) Air Conditioning Compressor Magnetic Clutch Circuit

  1. Reconnect the A magnet clutch connector.

  1. Apply battery voltage to the magnet clutch assembly and check the operation of the magnet clutch assembly.

    OK:
    Measurement Condition
    		Specified Condition
    Battery positive (+) → Terminal 3 (MG+)
    Battery negative (-) → Body ground
    		Magnet clutch assembly operating sound can be heard, and magnetic clutch hub and rotor lock.


NG
REPLACE MAGNET CLUTCH ASSEMBLY (LandCruiser RM0000016AL0A1X.html)
OK


11.CHECK HARNESS AND CONNECTOR (ENGINE ROOM NO. 1 RELAY BLOCK, JUNCTION BLOCK - BATTERY)


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System).Air Conditioning System (For Automatic Air Conditioning System) Air Conditioning Compressor Magnetic Clutch Circuit

  1. Disconnect the 1K engine room No. 1 relay block, junction block connector.

  1. Measure the voltage according to the value(s) in the table below.

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    1K-1 - Body ground
    		Ignition switch ON
    		11 to 14 V
    1K-13 - Body ground
    		Always
    		11 to 14 V
    Text in Illustration
    *a
    		Front view of wire harness connector
    (to Engine Room No. 1 Relay Block, Junction Block)


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


12.CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - BATTERY)


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System).Air Conditioning System (For Automatic Air Conditioning System) Air Conditioning Compressor Magnetic Clutch Circuit

  1. Disconnect the G25 amplifier connector.

  1. Measure the voltage according to the value(s) in the table below.

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    G25-20 (MGC) - Body ground
    		Ignition switch off
    		Below 1 V
    G25-20 (MGC) - Body ground
    		Ignition switch ON
    		11 to 14 V
    Text in Illustration
    *a
    		Front view of wire harness connector
    (to Air Conditioning Amplifier Assembly)


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


13.CHECK HARNESS AND CONNECTOR (ENGINE ROOM NO. 1 RELAY BLOCK, JUNCTION BLOCK - COOLER COMPRESSOR)

  1. Disconnect the 1J engine room No. 1 relay block, junction block connector.

  1. Disconnect the C39 cooler compressor assembly connector.

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    1J-9 - C39-3 (MG+)
    		Always
    		Below 1 Ω
    C39-3 (MG+) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE (LandCruiser RM0000045E302NX.html)