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Home >> Scion >> 2005 >> xA Automatic >> Repair and Diagnosis >> Engine Performance >> SFI System >> DTC P0300, P0301, P0302, P0303, P0304: Random/Multiple Cylinder Misfire Detected, Cylinder 1 Misfire Detected, Cylinder 2 Misfire Detected, Cylinder 3 Misfire Detected, Cylinder 4 Misfire Detected >> Confirmation Driving Pattern

Confirmation Driving Pattern

  1. Connect a hand-held tester or OBD II scan tool to the DLC3.
  2. Turn the ignition switch to ON.
  3. Turn the tester or scan tool ON.
  4. Record the DTC(s) and freeze frame data.
  5. Using the tester, switch the ECM from normal mode to check mode (see CHECK MODE PROCEDURE  ).
  6. Read the misfire counts of each cylinder (CYL #1 to #4) with the engine in an idling condition. If any misfire count is displayed, skip the following confirmation driving pattern.
  7. Drive the vehicle several times with the conditions, such as engine rpm and engine load, shown in MISFIRE RPM, MISFIRE LOAD in the DATA LIST.

    HINT:

    In order to store misfire DTCs, it is necessary to drive the vehicle for the period of time shown in the table below, with the MISFIRE RPM and MISFIRE LOAD in the DATA LIST.

    ENGINE RPM AND DURATION REFERENCE

    Engine RPM Duration
    Idling 3.5 minutes or more
    1,000 rpm 3 minutes or more
    2,000 rpm 1.5 minutes or more
    3,000 rpm 1 minute or more
  8. If using on OBD II scan tool, follow the operations below in order for DTCs to be set by the ECM.
    1. Drive the vehicle several times with the conditions, such as engine rpm and engine load, stored in the freeze frame data.
    2. Turn the ignition switch to OFF and then turn it to ON again.
    3. Repeat step ( 1) described above.
  9. Check whether misfires have occurred by checking DTCs and freeze frame data.

    HINT:

  10. Record the DTC(s), freeze frame data and misfire counts.
  11. Turn the ignition switch to OFF and wait for at least 5 seconds.
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