C6.6 Marine Generator Set Caterpillar

The injector trim files must be loaded into the ECM if any of the following conditions occur:

• An electronic unit injector is replaced.

• The ECM is replaced.

• Diagnostic code 268-2 is active.

• Electronic unit injectors are exchanged between cylinders.

Exchanging Electronic Unit Injectors

Exchanging electronic unit injectors can help determine if a combustion problem is in the electronic unit injector or in the cylinder. If two electronic unit injectors that are currently installed in the engine are exchanged between cylinders, the injector trim files can also be exchanged. Press the "Exchange" button at the bottom of the "Injector Trim Calibration" screen on the electronic service tool. Select the two electronic unit injectors that will be exchanged and press the "OK" button. The tattletale for the electronic unit injectors that were exchanged will increase by one.

Note: The serial number for the electronic unit injector and the confirmation code number for the electronic unit injector are located on the electronic unit injector.

1. Record the serial number and the confirmation code numberfor each electronic unit injector.

2. Obtain the injector trim file by one of the following methods:
   • Select "Service Software Files" on SIS.

   • Use the compact disc that is included with a replacement electronic unit injector.

3. Enter the serial number for the electronic unit injector in the search field.

4. Download the injector trim file to the PC. Repeat this procedure for each electronic unit injector, as required.

5. Connect the electronic service tool to the diagnostic connector. Refer to Troubleshooting, "Electronic Service Tools".

6. Turn the keyswitch to the ON position.

7. Select the following menu options on the electronic service tool:
   • Service

   • Calibrations

   • Injector Trim Calibration

8. Select the appropriate cylinder.

9. Click on the "Change" button.

10. Select the appropriate injector trim file from the PC.

11. Click on the "Open" button.

12. If a prompt is displayed on the electronic service tool, enter the confirmation code number for the electronic unit injector into the field.

13. Click on the "OK" button.

    The injector trim file is loaded into the ECM.

14. Repeat the procedure for each cylinder, as required.