2021 Lexus LC 500hFACTORY OEM SERVICE PROCEDURE

On-Vehicle Inspection [01/2017 - ]: Procedure

  1. INSPECT E.F.I. VACUUM SENSOR ASSEMBLY (MANIFOLD ABSOLUTE PRESSURE SENSOR) 
    1. Check the power source voltage.
      GTY832198Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to E.F.I. vacuum sensor assembly (manifold absolute pressure sensor))
      1. Disconnect the E.F.I. vacuum sensor assembly (manifold absolute pressure sensor) connector.
      2. Turn the power switch on (IG).
      3. Measure the voltage according to the value(s) in the table below.

        Standard Voltage

        Tester Connection Condition Specified Condition
        3(VC) - 2(E2) IG ON 4.75 to 5.25 V
        1(PIM) - 2(E2) IG ON 3.0 to 5.25 V
    2. Check the intake manifold pressure.
      1. Connect the Techstream to the DLC3.
      2. Turn the power switch on (IG).
      3. Turn the Techstream on.
      4. Enter the following menus: Powertrain / Engine / Data List / Intake Manifold Pressure.

        Powertrain > Engine > Data List 

        Tester Display
        Intake Manifold Absolute Pressure
      5. Read the E.F.I. vacuum sensor value.

        OK

        Same value as the actual atmospheric pressure

        HINT: 

        • Standard atmospheric pressure is 101 kPa (abs) [758 mmHg (abs)].
        • For every 100 m (328 ft.) increase in altitude, pressure drops by 1 kPa (7.5 mmHg).
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.