2005 Lexus ES 330FACTORY OEM SERVICE PROCEDURE

On-Vehicle Inspection

NOTE: "Cold" and "Hot" in this section mean 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. Check the DTCs.
      NOTE: If a DTC is present, perform troubleshooting in accordance with a procedure for that DTC.
    2. Check that a spark occurs.
      1. Remove the 6 ignition coils (see IGNITION COIL ASSY (3MZ-FE)  ).
      2. Using a spark plug wrench 16 mm, remove the 6 spark plugs.
        1. Torque: 25 N.m (250 kgf.cm, 18 ft.lbf) 
      3. Install the spark plugs to each ignition coil, then connect the ignition coil connectors.
      4. Disconnect the 6 fuel injector connectors.
      5. Ground the spark plugs.
      6. Check that the spark plug occurs at each spark plug while the engine is being cranked.
    NOTE:
    • Be sure to ground the spark plugs when checking.
    • Replace the ignition coil if physical impact is felt.
    • Do not crank the engine for more than 2 seconds.

    If a spark does not occur, perform the following test.

  1. SPARK TEST 

    NG: Go to next step 

  2. CHECK CONNECTION OF IGNITION COIL CONNECTOR 

    NG CONNECT SECURELY 

    OK: Go to next step 

  3. REPLACE IT WITH NORMAL IGNITION COIL AND PERFORM SPARK TEST AGAIN 

    OK REPLACE IGNITION COIL ASSY (See  IGNITION COIL ASSY (3MZ-FE)   ) 

    NG: Go to next step 

  4. CHECK POWER SUPPLY TO IGNITION COIL 
    1. Turn the ignition switch ON.
    2. Check that there is battery voltage at the ignition coil positive (+) terminal.

    NG CHECK WIRE HARNESS (BETWEEN IGNITION (START) SWITCH ASSY AND IGNITION COIL ASSY) 

    OK: Go to next step 

  5. INSPECT VVT SENSOR (See  INSPECTION   ) 

    NG REPLACE VVT SENSOR (See  VVT SENSOR (3MZ-FE)   ) 

    OK: Go to next step 

  6. INSPECT CRANKSHAFT POSITION SENSOR (See  INSPECTION   ) 

    NG REPLACE CRANKSHAFT POSITION SENSOR (See  CRANKSHAFT POSITION SENSOR (3MZ-FE)   ) 

    OK: Go to next step 

  7. INSPECT IGT SIGNAL FROM ECM (See  TERMINALS OF ECM  ) 

    NG REPLACE ECM (See  ECM (3MZ-FE)  ) 

    OK 

    REPAIR WIRE HARNESS (BETWEEN IGNITION COIL ASSY AND IGNITION (START) SWITCH ASSY) 

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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