SFI SYSTEM BASIC INSPECTION

When the malfunction is not confirmed by the DTC check, troubleshooting should be carried out in all circuits considered to be possible causes of the problem. In many cases, by carrying out the basic engine check shown in the following flowchart, the location of the problem can be found quickly and efficiently. Therefore, using this check is essential when troubleshooting the engine.


  1. CHECK BATTERY VOLTAGE

    Note

    Carry out this check with the engine stopped and the engine switch off.

    Result
    Result Proceed to
    11 V or more OK
    Below 11 V NG

    NG

    CHARGE OR REPLACE BATTERY
    OK

  2. CHECK WHETHER ENGINE CRANKS


    NG

    PROCEED TO PROBLEM SYMPTOMS TABLE
    OK

  3. CHECK WHETHER ENGINE STARTS


    NG

    GO TO STEP 6
    OK

  4. CHECK AIR FILTER


    1. Visually check that the air filter is not excessively contaminated with dirt or oil.


      NG

      REPLACE AIR FILTER
      OK

  5. CHECK IDLE SPEED


    NG

    TROUBLESHOOT IDLE SPEED AND PROCEED TO NEXT STEP
    OK

  6. CHECK FUEL PRESSURE


    NG

    TROUBLESHOOT FUEL PRESSURE AND PROCEED TO NEXT STEP
    OK

  7. CHECK FOR SPARK


    NG

    TROUBLESHOOT IGNITION SYSTEM AND PROCEED TO NEXT STEP
    OK
    PROCEED TO PROBLEM SYMPTOMS TABLE