2005 Toyota PriusFACTORY OEM SERVICE PROCEDURE

Ignition System (1NZ-FXE): Inspection

  1. INSPECT SPARK PLUG 
    NOTE:
    • Do not clean the spark plug with a wire brush. 
    • Do not adjust the gap of the used spark plug. 
    1. Clean the spark plug.
      1. Using a spark plug cleaner, clean the spark plug.
        AIR PRESSURE REFERENCE

        Air Pressure Duration
        588 kPa (6.0 kgf/cm2,85 psi ) 20 second or shorter
        Fig 1: Cleaning Spark Plug
        G02617137Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        HINT:

        • If the electrode is wet, dry it first, then clean it with a spark plug cleaner.
        • If the spark plug is wet with oil, remove the oil with gasoline before using a spark plug cleaner.
    2. Check the appearance.
      1. Check that the threads or insulator of the spark plug are not damaged.

        Recommends spark plug: 

        SPARK PLUG SPECIFICATION

        Supplier Type
        DENSO SK16R11
        NGK IFR5A11
        Fig 2: Checking Appearance
        G02617138Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Inspect the gap.
      1. Using a spark plug gap gauge, measure the gap of the spark plug.

        Standard: 1.0 to 1.1 mm (0.039 to 0.043 in.) 

        Maximum: 1.2 mm (0.047 in.) 

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

        Fig 3: Inspecting Gap
        G02617139Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. INSPECT CAMSHAFT POSITION SENSOR 
    1. Inspect the resistance.
      1. Using an ohmmeter, measure the resistance between the terminals.

        Standard: 

        RESISTANCE CHECK SPECIFIED CONDITION

        Tester Connection Specified Condition
        1 (G+) - 2 (G-) 1,630 to 2,740 Ω (Hot)
        1 (G+) - 2 (G-) 2,065 to 3,225 Ω (Cold)
        Fig 4: Inspecting Camshaft Position Sensor
        G02617140Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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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.

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