VACUUM SENSOR ON-VEHICLE INSPECTION

PROCEDURE


  1. INSPECT E.F.I. VACUUM SENSOR ASSEMBLY (MANIFOLD ABSOLUTE PRESSURE SENSOR)


    1. Connect the GTS to the DLC3.

    2. Turn the GTS on.

    3. Warm up the engine.

    4. Turn the A/C switch off.

    5. Enter the following menus: Powertrain / Engine / Data List / Turbocharger/Supercharger Inlet Pressure Bank1 and Turbocharger/Supercharger Inlet Pressure Bank2


      Powertrain > Engine > Data List
      Tester Display
      Turbocharger/Supercharger Inlet Pressure Bank1
      Turbocharger/Supercharger Inlet Pressure Bank2

    6. Read the air pressure value from the Data List.

      Tech Tips


      • Standard atmospheric pressure is approximately 101 kPa (abs) (15 psi (abs)).

      • For every 100 m (328 ft) increase in altitude, atmospheric pressure drops by approximately 1 kPa (0.15 psi). This varies by weather.

    7. Using a vacuum pump, set the E.F.I. vacuum sensor assembly (manifold absolute pressure sensor).

    8. Using a vacuum pump, read the value when pressure is applied and when pressure is decreased.

      OK
      The pressure values when applying pressure or decreasing pressure using the vacuum pump and the Data List values are nearly the same.

      Note


      • Do not apply a pressure of 50 kPa (0.5 kgf/cm2, 7.3 psi) or more to the E.F.I. vacuum sensor assembly (manifold absolute pressure sensor).

      • Do not apply a vacuum of 50 kPa (375 mmHg, 14.8 in.Hg) or more to the E.F.I. vacuum sensor assembly (manifold absolute pressure sensor).

      Tech Tips

      The pressure value displayed in the Data List is the pressure value indicated on the vacuum pump with the air pressure value added.

      Example:
      Vacuum Pump Pressure Value Air Pressure Value Equation Data List Value
      When vacuum is applied at 30 kPa (225 mmHg, 8.86 in.Hg)

      100 kPa (1.0 kgf/cm2, 15 psi)

      		 -30 + 100 = 70

      70 kPa (0.7 kgf/cm2, 10.2 psi)

      When pressure is applied at 20 kPa (0.2 kgf/cm2, 3 psi)

      		 20 + 100 = 120

      120 kPa (1.2 kgf/cm2, 17 psi)