Heater Switch Inspection


  1. INSPECT HEATER SWITCH ASSEMBLY

  2. INSPECT IDLE UP SWITCH

Heater Switch -- Inspection



1. INSPECT HEATER SWITCH 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).Heater Switch Inspection

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

    Standard Resistance:
    Tester Connection
    		Switch Condition
    		Specified Condition
    6 (+S) - 3 (E)
    		Heater switch assembly off
    		10 kΩ or higher
    Heater switch assembly on
    		Below 1 Ω

  1. Apply battery voltage to the connector and check the LED illumination.

    OK:
    Measurement Condition
    		Specified Condition
    Battery positive (+) → Terminal 5 (ILL+)
    Battery negative (-) → Terminal 4 (ILL-)
    		LED illuminates
    Text in Illustration
    *a
    		Component without harness connected
    (Heater Switch Assembly)
    If the result is not as specified, there may be a malfunction in the heater switch assembly.


2. INSPECT IDLE UP SWITCH


Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System).Heater Switch Inspection

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

    Standard Resistance:
    Tester Connection
    		Switch Condition
    		Specified Condition
    6 (SW) - 3 (E)
    		Idle up switch off
    		10 kΩ or higher
    Idle up switch on
    		Below 1 Ω

  1. Apply battery voltage to the connector and check the LED illumination.

    OK:
    Measurement Condition
    		Specified Condition
    Battery positive (+) → Terminal 5 (ILL+)
    Battery negative (-) → Terminal 4 (ILL-)
    		LED illuminates
    Text in Illustration
    *a
    		Component without harness connected
    (Idle Up Switch)
    If the result is not as specified, there may be a malfunction in the idle up switch.