RX400h · Service Manual ENGINE

INSPECTION

Inspection


INSPECT SPARK PLUG

NOTICE:
  1. Do not use a wire brush for cleaning.
  2. Do not attempt to adjust the electrode gap of a used spark plug.

  1. A111035E01
    Check the electrode.

    1. Using a megaohmmeter, measure the insulation resistance.

      Correct insulation resistance:
      10 MΩ or higher

      If the resistance is less then the specified value, proceed to step (b).

      HINT:
      If a megaohmmeter is not available, perform the following simple inspection instead.

  1. B001301
    Alternative inspection method:

    1. Quickly accelerate the engine to 4,000 rpm 5 times.

    2. Remove the spark plug.

    3. Visually check the spark plug.

      Result:
      Electrode condition
      		 Next step
      Dry
      		 Go to next step
      Wet
      		 Proceed to step (c)

    4. Reinstall the spark plug.

  1. IG00316
    Check the spark plug for any damage to its threads and insulator.
    If there is any damage, replace the spark plug.
    Recommended spark plug: 
    DENSO made
    		 SK20R11
    NGK made
    		 IFR6A11

  1. B002101E02
    Check the spark plug electrode gap.

    Maximum electrode gap for used spark plug:
    1.3 mm (0.051 in.)

    If the gap is greater than the maximum, replace the spark plug.

    Correct electrode gap for new spark plug:
    1.0 to 1.1 mm (0.039 to 0.043 in.)

  1. B062019
    Clean the spark plugs.
    If the electrode has traces of wet carbon, clean the electrode with a spark plug cleaner and then dry it.

    Air pressure:
    Blow 588 kPa (6 kgf/cm2, 85 psi)

    Duration:
    20 seconds or less

    HINT:
    If there are traces of oil, remove them with gasoline before using the spark plug cleaner.

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