Air Switching Valve Inspection


  1. INSPECT AIR SWITCHING VALVE ASSEMBLY

Air Switching Valve -- Inspection



1. INSPECT AIR SWITCHING VALVE ASSEMBLY

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    1 - 2
    		20°C (68°F)
    		4.5 to 5.5 Ω
    1 - Body ground
    		Always
    		1 MΩ or higher
    2 - Body ground
    HINT:
    When measuring the resistance make sure that the surface temperature of the air switching valve is 20°C.
    If the result is not as specified, replace the air switching valve assembly.


  1. Check the operation of the air switching valve.



      Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.2Tr-Fe Emission Control.Emission Control System.Air Switching Valve Inspection

    1. Check that air does not flow from port A to port B.

      Text in Illustration
      *a
      		Port A
      *b
      		Port B
      Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155
      		Air
      NOTICE:
      Make sure the applied pressure is 30 kPa (0.3 kgf/cm2, 4.4 psi) or less.
      If the result is not as specified, replace the air switching valve assembly.


      2. Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.2Tr-Fe Emission Control.Emission Control System.Air Switching Valve Inspection

    2. Apply battery voltage across terminals 1 and 2.

      Text in Illustration
      *a
      		Component without harness connected
      (Air Switching Valve Assembly)
      *a
      		Port A
      *c
      		Port B
      Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155
      		Air
      NOTICE:
      Apply voltage for 2 minutes or less.

    3. Check that air flows from port A to port B.
      If the result is not as specified, replace the air switching valve assembly.