ECD SYSTEM PRECAUTION


  1. INITIALIZATION AND REGISTRATION

    Note

    When replacing the ECM and/or any other components in the following chart, perform the corresponding utility items.

    Tech Tips

    When the ECM and one or more other components are replaced at the same time, perform the following utility items by following the instructions shown on the GTS display, starting with the ECM.

    Replacement Part Utility Item
    ECM
    Engine assembly
    Fuel supply pump assembly

    Supply Pump Initialization Click here

    Injector assembly
    Diesel throttle body assembly

    Initialization Click here

    Tech Tips

    When the ECM must be replaced, before replacing the ECM, perform the "Learning Values Save" function using the GTS. Then after installing the new ECM, perform all of the initializations/registrations for the "Learning Values Write" function by following the instructions shown on the GTS display.

  2. INJECTOR COMPENSATION CODE

    Tech Tips


    • Each injector assembly has different fuel injection characteristics. In order to optimize fuel injection performance, the ECM compensates for these differences by adjusting the fuel injection duration of each injector assembly according to its compensation code. Injector compensation codes are unique, 30-digit, alphanumeric values printed on the head portion of each injector assembly.

    • If an incorrect injector compensation code is input into the ECM, the engine may rattle or engine idling may become rough. In addition, engine failure may occur and the life of the engine may be shortened.


    1. B003M7OC04
      *a Example
      *b Injector Compensation Code

      When an injector assembly is replaced, the injector compensation code must be input into the ECM Click here.

    2. When the ECM is replaced, all of the existing injector compensation codes must be input into the new ECM Click here.

  3. PILOT QUANTITY LEARNING

    Tech Tips


    • By performing "Pilot Quantity Learning", the injection volume for each cylinder is precisely adjusted so that the engine runs smoothly. The "Pilot Quantity Learning" information is stored in the EEPROM of the ECM.

    • If an incorrect pilot quantity learning value is input into the ECM, the engine may rattle or engine idling may become rough.


    1. When an injector assembly is replaced, the injector compensation code must be input to the ECM, and then pilot quantity learning must be performed Click here.

    2. When the ECM is replaced, all of the existing injector pilot quantity learning values must be input into the new ECM Click here.

  4. ENGINE DIFFICULT TO START, ENGINE STALLING, BLACK SMOKE EMITTED, ROUGH IDLING, EXCESSIVE ENGINE VIBRATION, ENGINE KNOCKING, LACK OF POWER OR HESITATION


    1. Check if the customer problem is described below. If so, refer to the appropriate troubleshooting section.


      1. Engine is difficult to start or stalling.

      2. Black smoke is emitted.

      3. There is rough idling or excessive engine vibrations.

      4. There is engine knocking or rattling.

      5. There is a lack of power or hesitation.

  5. WHEN USING GTS

    CAUTION:


    • Observe the following items for safety reasons:


      • Read the GTS's instruction books before using the GTS.

      • Make sure that the GTS cable is not caught on the pedals, shift lever or steering wheel when driving with the GTS connected to the vehicle.

      • When driving the vehicle for testing purposes using the GTS, two persons are required. One drives the vehicle and the other operates the GTS.