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Home >> Scion >> 2004 >> xA Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - Diagnosis >> DTC P0300, DTC P0301, DTC P0302, DTC P0303, DTC P0304: Random/Multiple Cylinder Misfire Detected & Cylinder Misfire Detected >> Confirmation Driving Pattern
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Confirmation Driving Pattern

  1. Connect the hand-held tester or the OBD II scan tool to the DLC3.
  2. Record DTC and the freeze frame data.
  3. Use the hand-held tester to set the check mode (See CHECK MODE PROCEDURE ).
  4. Read the value on the misfire counter for each cylinder when idling. If the value is displayed on the misfire counter, skip the following procedure of confirmation driving.
  5. Drive the vehicle several times with the engine speed, load and its surrounding range shown with ENGINE SPD, CALC LOAD in the freeze frame data or MISFIRE RPM, MISFIRE LOAD in the DATA LIST.

    If you have no hand-held tester, turn the ignition switch OFF after the symptom is simulated once. Then repeat the simulation process again.

    NOTE: In order to memorize the DTC of misfire, it is necessary to drive around MISFIRE RPM, MISFIRE LOAD in the DATA LIST for the following period of time. Take care not to turn the ignition switch OFF. Turning the ignition switch OFF switches the diagnosis system from check mode to normal mode. So all DTCs, etc., are erased.
    CONFIRMATION DRIVING PATTERN

    Engine Speed Time
    Idling 3 Minutes 30 Seconds Or More
    1,000 RPM 3 Minutes Or More
    2,000 RPM 1 Minute 30 Seconds Or More
    3,000 RPM 1 Minute Or More
  6. Check whether there is misfire or not by monitoring DTC and the freeze frame data. After that, record them.
  7. Turn the ignition switch OFF and wait for at least 5 seconds.
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