2006 Toyota Camry Base, AutomaticFACTORY OEM SERVICE PROCEDURE

Ignition System (1MZ-FE/3MZ-FE): Inspection

NOTE: In this article, the terms "cold" and "hot" refer to the temperature of the coils. "Cold" means approximately -10° C (14° F) to 50° C (122° F). "Hot" means approximately 50° C (122° F) to 100° C (212° F).
  1. INSPECT SPARK PLUG 
    NOTE:
    • Do not use a wire brush for cleaning.
    • Do not attempt to adjust the electrode gap of a used spark plug.
    1. Check the electrode.
      1. Using an ohmmeter, measure the insulation resistance.

      Correct insulation resistance: 10 MΩ or more 

      If the resistance is less than the specified value, proceed to step (d).

      HINT:

      If the ohmmeter is not available, perform the following simple inspection instead.

      Fig 1: Measuring Insulation Resistance Using An Ohmmeter
      G04392659Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. 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.
        • If the electrode is dry, the spark plug is functioning. Proceed to step 2.
        • If the electrode is damp, proceed to steps (c), (d) and (e).
      4. Install the spark plug.
      Fig 2: Checking Spark Plug
      G04392660Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Check the spark plug for any damage on its thread and insulator.

      If there is damage, replace the spark plug.

      Recommended spark plug: 

      SPARK PLUG SPECIFICATION TABLE

      DENSO made SK20R11
      NGK made IFR6A11
    4. 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.) 

      NOTE: If adjusting the gap of a new spark plug, bend only the base of the ground electrode. Do not touch the tip. Never attempt to adjust the gap on a used plug.
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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.