2002 Lexus ES 300FACTORY OEM SERVICE PROCEDURE

On-Vehicle Inspection

NOTE: "Cold" and "Hot" in these sentences 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).
  1. Inspect ignition coil and spark test.
    1. Confirm DTC.
      NOTE: If DTC is indicated, carry out troubleshooting in accordance with the procedure on the following DTC.
    2. Check that the spark occurs.
      1. Remove the intake air surge tank. See VALVE CLEARANCE .
      2. Remove the ignition coils.
      3. Using a 16mm (0.63 in) plug wrench, remove the all spark plugs.
      4. Install the spark plugs to each ignition coils, and connect the ignition coil connectors.
      5. Disconnect the all injector connectors.
      6. Ground the spark plugs.
      7. Check if spark occurs while engine is being cranked.
      NOTE:
      • Be sure to ground the spark plug, when checking.
      • Replace the ignition coil when it is given an impact.
      • Do not crank the engine for more than 2 seconds.

      If the spark does not occur, do the test as follow.

    3. Using a 16 mm (0.63 in.) plug wrench, install the spark plugs.

      Torque:  18 N.m (184 kgf.cm, 13 ft.lbf)

    4. Install the ignition coils.

      Torque:  8.0 N.m (82 kgf.cm, 71 in.lbf)

Factory Service Tools

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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.