LEMON Manuals: Even more car manuals for everyone
Home >> Lexus >> 2006 >> RX 330 AWD >> Repair and Diagnosis >> Engine Performance >> Tune-Up >> Ignition (3MZ-FE) >> Ignition System >> On-Vehicle Inspection

On-Vehicle Inspection

NOTE: In this information, the terms "cold" and "hot" refer to the temperature of the coils. "Cold" means approximately - 10 to 50°C (14 to 122°F). "Hot" means approximately 50 to 100°C (122 to 212°F).
  1. PERFORM SPARK TEST 
    1. Check for DTCs.
      NOTE: If a DTC is present, perform troubleshooting procedures for that DTC.
    2. Check if sparks occur.
      1. Remove the intake air surge tank (See REMOVAL ).
      2. Remove the ignition coils (with igniter).
      3. Using a 16 mm plug wrench, remove the spark plugs.
      4. Install the spark plugs to each ignition coil (with igniter) and connect the ignition connectors.
      5. Disconnect the 6 injector connectors.
      6. Ground the spark plugs.
      7. Check if spark occurs at each spark plug while engine is being cranked.
      NOTE:
      • Be sure to ground the spark plug when checking.
      • If the ignition coil has been struck or dropped, replace it.
      • Do not crank the engine for more than 2 seconds.
    3. Perform the spark test according to the flow Chart below.
      1. Check that the wire harness side connector of ignition coil with igniter is securely connected.

        Result 

        SPARK TEST RESULT CHART

        Result Proceed to
        NG Connect securely
        OK Go to next step
      2. Perform a spark test on each ignition coil with igniter.
        1. Replace the ignition coil with igniter with a normal one.
        2. Perform spark test again.

        Result 

        SPARK TEST RESULT CHART

        Result Proceed to
        OK Replace ignition coil with igniter
        NG Go to next step
      3. Check the power supply to ignition coil with igniter.
        1. Turn the ignition switch on.
        2. Check that there is battery voltage at ignition coil positive (+) terminal.

        Result 

        BATTERY VOLTAGE RESULT CHART

        Result Proceed to
        NG Check wiring between engine switch And ignition coil with igniter
        OK Go to next step
      4. Check the resistance of the VVT sensor (See INSPECTION  ).

        Standard resistance 

        TESTER TEMPERATURE/CONDITION TABLE

        Temperature Specified Condition
        Cold 835 to 1,400 Ω
        Hot 1,060 to 1,645 Ω

        Result 

        RESULT CHART

        Result Proceed to
        NG Replace VVT sensor
        OK Go to next step
      5. Check the resistance of the crankshaft position sensor (See INSPECTION ).

        Standard resistance 

        TESTER TEMPERATURE/CONDITION TABLE

        Temperature Specified Condition
        Cold 1,630 to 2,740 Ω
        Hot 2,065 to 3,225 Ω
        RESULT CHART

        Result Proceed to
        NG Replace crankshaft position sensor
        OK Go to next step

        Result 

      6. Check the IGT signal from the ECM (See DTC P0351 IGNITION COIL "A" PRIMARY / SECONDARY CIRCUIT: DTC P0352 IGNITION COIL "B" PRIMARY / SECONDARY CIRCUIT: DTC P0353 IGNITION COIL "C" PRIMARY / SECONDARY CIRCUIT: DTC P0354 IGNITION COIL "D" PRIMARY / SECONDARY CIRCUIT: DTC P0355 IGNITION COIL "E" ).

        Result 

      RESULT CHART

      Result Proceed to
      NG Check ECM
      OK Repair wiring between ignition coil and ECM
    4. Using a 16 mm plug wrench, install the spark plug.

      Torque: 25 N*m (250 kgf*cm, 18 ft.*lbf) 

    5. Install the ignition coils (with igniter).

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

    6. Install the intake air surge tank (See INSTALLATION ).
scientia non olet · About LEMON Manuals