ECD SYSTEM(for CCo) PRECAUTION

  1. IGNITION SWITCH EXPRESSION

    Tip:

    The type of ignition switch used on this model differs depending on the specifications of the vehicle. The expressions listed in the table below are used in this section.

    Expression

    Ignition Switch (Position)

    Engine Switch (Condition)

    Ignition Switch off

    LOCK

    Off (Lock)

    Ignition Switch ACC

    ACC

    On (ACC)

    Ignition Switch ON

    ON

    On (IG)

    Engine Start

    START

    On (Start)

  2. INITIALIZATION AND REGISTRATION

    Note:

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

    Tip:

    When the ECM and other component(s) 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

    No. 1 crankshaft position sensor plate

    Clear Crank Time Compensation Data (Click here)

    Supply pump assembly

    Suction control valve

    Supply Pump Initialization (Click here)

    Injector assembly

    • Input Injector Compensation Code (Click here)

    • After that perform the Pilot Quantity Learning (Click here)
    Tip:

    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.

  3. INJECTOR COMPENSATION CODE

    Tip:

    • Each injector 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 according to its compensation code. Injector compensation codes are unique, 30-digit, alphanumeric values printed on the head portion of each injector.

    • 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. A203986C01

      *1

      Fuel Injector Compensation Code

      *a

      Example

      When an injector 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).

  4. PILOT QUANTITY LEARNING

    Tip:

    • 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 is replaced, the injector compensation code must to input to the ECM and then perform the pilot quantity learning (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).

  5. DIFFICULT TO START ENGINE, 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 stalls.

      2. Black smoke is emitted.

      3. Rough Idling or Excessive Engine Vibrations.

      4. Engine Knocking or Rattling.

      5. Lack of Power or Hesitation.

  6. WHEN USING GTS

    CAUTION:

    • Observe the following items for safety reasons:

      • Read its instruction books before using the GTS.

      • Prevent the GTS cable from being caught on the pedals, shift lever and 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.