2002 Lexus ES 300FACTORY OEM SERVICE PROCEDURE

Ignition System: Inspection

NOTE: Try not to clean the irridium and platinum tip. However, when the cleaning is necessary, use of spark plug cleaner is recommended. Duration should be less than 20 seconds.

  1. Sparkplug

    1. Check the spark plug for thread damage and insulator damage.

      If abnormal, replace the spark plug.

      Recommended spark plug:

      • DENSO MADE SK20R11
      • NGK MADE IFR6A11

      Fig 1: Checking Spark Plug
      G01207146Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Check the electrode gap.

      Electrode Gap:  1.0-1.1 mm (0.039-0.043 in.)

      Maximum Electrode Gap:  1.2 mm (0.047 in.)

      Fig 2: Checking Electrode Gap
      G01207147Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    NOTE:
    • This engine is fitted with irridium-tipped spark plugs. Never attempt to adjust the electrode gap.
    • Do not scratch the irridium and platinum tip between electrode gap.

  2. Crank Position (CKP) Sensor No. 1 (RH Cylinder)

    1. Using an ohmmeter, measure the resistance between terminals.

      Resistance:

      • Cold 835-1400 ohms
      • Hot 1060-1645 ohms

    NOTE: "Cold" and "Hot" on the table express the temperature of the coils themselves. "Cold" is from -10°C (14°F) to 50°C (122°F) and "Hot" is from 50°C (122°F) to 100°C (212°F).

  3. Crank Position (CKP) Sensor

    1. Using an ohmmeter, measure the resistance between terminals.

      Resistance:

      • Cold 1630-2740 ohms
      • Hot 2065-3225 ohms

    NOTE: "Cold" and "Hot" on the table express the temperature of the coils themselves. "Cold" is from-10°C (14°F) to 50°C (122°F) and "Hot" is from 50°C (122°F) to 100°C (212°F).
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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.