Manifold Absolute Pressure Sensor On-Vehicle Inspection


  1. INSPECT AIR PRESSURE SENSOR

Manifold Absolute Pressure Sensor -- On-Vehicle Inspection



1. INSPECT AIR PRESSURE SENSOR


  1. Inspect the power source voltage.

    1. Disconnect the air pressure sensor connector.

    2. Turn the ignition switch to ON.



      3. Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.2Tr-Fe Engine Control.Sfi System.Manifold Absolute Pressure Sensor On-Vehicle Inspection

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

      Standard Voltage:
      Tester Connection
      		Switch Condition
      		Specified Condition
      3 (VC) - 1 (E2)
      		Ignition switch ON
      		4.75 to 5.25 V
      Text in Illustration
      *a
      		Front view of wire harness connector
      (to Air Pressure Sensor)
      If the result is not as specified, inspect the wire harness and ECM.

    4. Turn the ignition switch off.

    5. Connect the air pressure sensor connector.



  1. Check the pressure.



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

    1. Connect a pressure gauge to the air pressure sensor as shown in the illustration.

    2. Connect the GTS to the DLC3.

    3. Turn the ignition switch to ON.

    4. Turn the GTS on

    5. Enter the following menus: Powertrain / Engine and ECT / Data List / Air Pump Pressure (absolute).

    6. Check that the pressure displayed on the GTS fluctuates when applying pressure to the air pressure sensor with the pressure gauge.

      OK:
      Pressure fluctuates in response to pressure applied with pressure gauge.
      HINT:
      The GTS displays the air pump pressure (Air Pump Pressure (absolute)) as absolute pressure.
      If the result is not as specified, replace the air pressure sensor.