Air Conditioning System (For Automatic Air Conditioning System) Heater Control Switch Circuit

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

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK FOR DTC

CHECK OPERATION

INSPECT TEMPERATURE CONTROL SWITCH ASSEMBLY LH

CHECK HARNESS AND CONNECTOR (TEMPERATURE CONTROL SWITCH ASSEMBLY LH - AIR CONDITIONING CONTROL ASSEMBLY)

INSPECT TEMPERATURE CONTROL SWITCH ASSEMBLY RH

CHECK HARNESS AND CONNECTOR (TEMPERATURE CONTROL SWITCH ASSEMBLY RH - AIR CONDITIONING CONTROL ASSEMBLY)

CHECK AIR CONDITIONING CONTROL ASSEMBLY

AIR CONDITIONING SYSTEM (for Automatic Air Conditioning System) - Heater Control Switch Circuit


DESCRIPTION

The temperature control switch assembly LH and RH sends the temperature up and down signal to the air conditioning amplifier assembly through the air conditioning control 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) Heater Control Switch Circuit


INSPECTION PROCEDURE

1.CHECK FOR DTC

  1. Clear the DTCs (Click here).

  1. Check for DTCs (Click here).

    OK:
    DTC B14B2 is not output..


NG
GO TO DTC B14B2 (Click here)
OK


2.CHECK OPERATION

  1. Check that the temperature control switches operate.

    Result
    Result
    		Proceed to
    Temperature control switch LH does not operate
    		A
    Temperature control switch RH does not operate
    		B
    Temperature control switch LH and RH do not operate
    		C


B
Go to step 5

C
Go to step 7
A


3.INSPECT TEMPERATURE CONTROL SWITCH ASSEMBLY LH


    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) Heater Control Switch Circuit

  1. Remove the temperature control switch assembly LH (Click here).

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

    Standard Resistance:
    Tester Connection
    		Switch Condition
    		Specified Condition
    3 (UP) - 4 (SE)
    		UP switch pressed
    		Below 1 Ω
    UP switch not pressed
    		10 kΩ or higher
    5 (DOWN) - 4 (SE)
    		DOWN switch pressed
    		Below 1 Ω
    DOWN switch not pressed
    		10 kΩ or higher
    Text in Illustration
    *a
    		Component without harness connected
    (Temperature Control Switch Assembly LH)


NG
REPLACE TEMPERATURE CONTROL SWITCH ASSEMBLY LH (Click here)
OK


4.CHECK HARNESS AND CONNECTOR (TEMPERATURE CONTROL SWITCH ASSEMBLY LH - AIR CONDITIONING CONTROL ASSEMBLY)

  1. Disconnect the F133 temperature control switch assembly LH connector.

  1. Disconnect the F10 air conditioning control assembly connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    F133-3 (UP) - F10-12 (DTP+)
    		Always
    		Below 1 Ω
    F133-5 (DOWN) - F10-11 (DTP-)
    		Always
    		Below 1 Ω
    F133-4 (SE) - F10-9 (S5)
    		Always
    		Below 1 Ω
    F133-3 (UP) - Body ground
    		Always
    		10 kΩ or higher
    F133-5 (DOWN) - Body ground
    		Always
    		10 kΩ or higher
    F133-4 (SE) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE AIR CONDITIONING CONTROL ASSEMBLY (Click here)

5.INSPECT TEMPERATURE CONTROL SWITCH ASSEMBLY RH


    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) Heater Control Switch Circuit

  1. Remove the temperature control switch assembly RH (Click here).

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

    Standard Resistance:
    Tester Connection
    		Switch Condition
    		Specified Condition
    5 (UP) - 4 (SE)
    		UP switch pressed
    		Below 1 Ω
    UP switch not pressed
    		10 kΩ or higher
    3 (DOWN) - 4 (SE)
    		DOWN switch pressed
    		Below 1 Ω
    DOWN switch not pressed
    		10 kΩ or higher
    Text in Illustration
    *a
    		Component without harness connected
    (Temperature Control Switch Assembly LH)


NG
REPLACE TEMPERATURE CONTROL SWITCH ASSEMBLY RH (Click here)
OK


6.CHECK HARNESS AND CONNECTOR (TEMPERATURE CONTROL SWITCH ASSEMBLY RH - AIR CONDITIONING CONTROL ASSEMBLY)

  1. Disconnect the F132 temperature control switch assembly RH connector.

  1. Disconnect the F10 air conditioning control assembly connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    F132-5 (UP) - F10-10 (PTP+)
    		Always
    		Below 1 Ω
    F132-3 (DOWN) - F10-3 (PTP-)
    		Always
    		Below 1 Ω
    F132-4 (SE) - F10-2 (SG)
    		Always
    		Below 1 Ω
    F132-5 (UP) - Body ground
    		Always
    		10 kΩ or higher
    F132-3 (DOWN) - Body ground
    		Always
    		10 kΩ or higher
    F132-4 (SE) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE AIR CONDITIONING CONTROL ASSEMBLY (Click here)

7.CHECK AIR CONDITIONING CONTROL ASSEMBLY

  1. Replace the air conditioning control assembly with a new or normally functioning one (Click here).

  1. Check that the temperature control with temperature control switch LH and RH.

    OK:
    Temperature control with temperature control switch LH and RH.


NG
REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY (Click here)
OK

END (AIR CONDITIONING CONTROL ASSEMBLY IS DEFECTIVE)