Air Conditioning System (For Automatic Air Conditioning System) Rear Magnetic Valve Circuit

Vehicle Interior. Land Cruiser. Urj200, 202 Grj200 Vdj200
Heating Air Conditioning. Land Cruiser. Urj200, 202 Grj200 Vdj200

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

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

INSPECT FUSE (A/C IG)

CHECK HARNESS AND CONNECTOR (WIRING AIR CONDITIONING HARNESS - BATTERY)

CHECK HARNESS AND CONNECTOR (WIRING AIR CONDITIONING HARNESS - AIR CONDITIONING AMPLIFIER)

CHECK REAR COOLING UNIT EXPANSION VALVE (OPERATION)

CHECK WIRING AIR CONDITIONING HARNESS SUB-ASSEMBLY (OPERATION)

AIR CONDITIONING SYSTEM (for Automatic Air Conditioning System) - Rear Magnetic Valve Circuit


DESCRIPTION

The rear cooling unit expansion valve (rear magnetic valve) is controlled by the air conditioning amplifier assembly.

WIRING DIAGRAM


Land Cruiser. Urj200, 202 Grj200 Vdj200.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System).Air Conditioning System (For Automatic Air Conditioning System) Rear Magnetic Valve Circuit


INSPECTION PROCEDURE

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

  1. Select the Active Test, use the intelligent tester to generate a control command, and then check that the rear cooling unit expansion valve operates.

    OK:
    Rear cooling unit expansion valve operates normally.

    Air Conditioner
    Tester Display
    		Test Part
    		Control Range
    		Diagnostic Note
    Rear A/C Mag Valv
    		Rear cooling unit expansion valve
    		OFF or ON
    		-


NG
Go to step 2
OK

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY (Click here)

2.INSPECT FUSE (A/C IG)

  1. Remove the A/C IG fuse from the cowl side junction block LH.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    A/C IG fuse
    		Always
    		Below 1 Ω


NG
REPLACE FUSE
OK


3.CHECK HARNESS AND CONNECTOR (WIRING AIR CONDITIONING HARNESS - BATTERY)


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System).Air Conditioning System (For Automatic Air Conditioning System) Rear Magnetic Valve Circuit

  1. Disconnect the wiring air conditioning harness sub-assembly connector.

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    2 (+S) - Body ground
    		Engine switch off
    		Below 1 V
    Engine switch on (IG)
    		11 to 14 V


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.CHECK HARNESS AND CONNECTOR (WIRING AIR CONDITIONING HARNESS - AIR CONDITIONING AMPLIFIER)
Land Cruiser. Urj200, 202 Grj200 Vdj200.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System).Air Conditioning System (For Automatic Air Conditioning System) Rear Magnetic Valve Circuit

  1. Disconnect the wiring air conditioning harness sub-assembly connector.

  1. Disconnect the E36 amplifier connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    3 (RMGV) - E36-19 (RMGV)
    		Always
    		Below 1 Ω
    3 (RMGV) - Body ground
    		Always
    		10 kΩ or higher
    E36-19 (RMGV) - Body ground


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


5.CHECK REAR COOLING UNIT EXPANSION VALVE (OPERATION)

  1. Replace the rear cooling unit expansion valve (Click here).

    HINT:
    Since the rear cooling unit expansion valve cannot be inspected while it is removed from the vehicle, replace the rear cooling unit expansion valve with a normal one and check that the condition returns to normal.
    OK:
    Same problem does not occur.


NG
Go to step 6
OK

REPLACE REAR COOLING UNIT EXPANSION VALVE (Click here)

6.CHECK WIRING AIR CONDITIONING HARNESS SUB-ASSEMBLY (OPERATION)

  1. Replace the wiring air conditioning harness sub-assembly with a normal one and check that the condition returns to normal.

    OK:
    Same problem does not occur.


NG
REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY (Click here)
OK

REPLACE WIRING AIR CONDITIONING HARNESS SUB-ASSEMBLY