2004 Toyota Corolla LE, AutomaticFACTORY 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 (WITH IGNITER) 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 ignition coils (with igniter).
      2. Using a 16 mm (0.63 in) plug wrench, remove the spark plugs.
      3. Install the spark plugs to each ignition coils (with igniter), and connect the ignition coil connectors.
      4. Disconnect the 4 injector connectors.
      5. Ground the spark plugs.
      6. 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.

      HINT:

      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: 25 N.m (255 kgf.cm, 18 ft.lbf) 

    4. Install the ignition coil with igniter.

      Torque: 9.0 N.m (92 kgf.cm, 80 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.

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