INJECTOR IDENTIFICATION CODE REGISTRATION PROCEDURE <4M4>


M10001000158ENG0000010000


caution
  1. If the injector identification code is not registered, the engine warning lamp goes on and diagnosis code No. P1626 is logged.
  2. Failure to register the injector identification code correctly will cause rough idling, abnormal noise, and emission deterioration.

PURPOSE



Because individual injectors have different injection characteristics, the engine-ECU corrects injection time for each cylinder to improve injection accuracy.
For this reason, when the injector or engine-ECU is replaced, injector correction data must be registered afterwards in the engine-ECU using the Multi Use Tester III (M.U.T.-III).
Correction data is converted into an identification code consisting of 30 alphanumeric characters and printed on the injector connector.

REGISTRATION PROCEDURE


1. When replacing the engine-ECU, connect the current engine-ECU to the body harness.
noteThis operation is purposed to read the injector identification code stored in the engine-ECU. Reading the identification code in this way before replacement can eliminate manual input of the identification code after replacement.
2. After the ignition switch is in "LOCK" (OFF) position, connect the M.U.T.-III to the diagnosis connector.
3. Turn the ignition switch to "ON" position.
4. Select SPECIAL FUNCTION from the function menu.
5. When the current engine-ECU is still mounted, read and register the injector identification code as follows:
(1)Select Read Injector ID Code (for engine-ECU replacement) from the SPECIAL FUNCTION menu.
(2)Select Write and Save Injector ID Code from the menu to read data from the current engine-ECU and save the data if it could be read normally.
(3)Mount the new engine-ECU on the vehicle.
(4)Select SPECIAL FUNCTION from the function menu.
(5)Select Write Injector ID Code (for engine-ECU replacement) from the SPECIAL FUNCTION menu.
(6)Select SAVED INJECTOR ID WRITING from the Write Injector ID Code menu to write the data, which was saved previously, to the engine-ECU.

6. If the injector has been replaced or data has not been read from the current engine-ECU, register the injector identification code as follows:
(1)Select Write Injector ID Code from the SPECIAL FUNCTION menu.
(2)If the injector was replaced, specify whether to write to every cylinder or a specific cylinder.
(3)Select the write mode from the menu, enter the identification code printed on the injector, and execute writing.
cautionEven if the number of the cylinder to be registered does not match the actual injector mounting location, registration ends normally. Specify the cylinder number correctly.
noteThe identification code is displayed in order of the frame numbers when it is read.
7. Makes sure that the engine warning lamp that is on changes to blinking, indicating the registration is complete.
noteWhen the injector is replaced, executing the write operation also clears the values of small injection quantity learning.
8. Execute small injection quantity learning.
Refer to , the SMALL INJECTION QUANTITY LEARNING PROCEDURE for the learning procedure.
9. Confirm that the engine warning lamp is off.
Confirm also that the diagnosis code is not stored.