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COWLING GP 4Z7271 - Caterpillar



4Z7271 COWLING GP Caterpillar parts COWLING
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66
Alternative (cross code) number:
CA4Z7271
4Z-7271
4Z7271
Caterpillar 4Z7271 COWLING GP

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Illustration 1 g02854936
Label with the injector code
Illustration 2 g02132457
Sequence for recording the injector code
The electronic service tool is used to load the injector codes into the ECM.The injector codes 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 630-2 or 268-2 is active.
Electronic unit injectors are exchanged between cylinders.Note: Diagnostic code 630-2 or 268-2 will also become active if the engine serial number, FLS or FTS are not entered into the ECM.If the ECM is replaced, the injector codes are normally transferred to the new ECM as part of the "Copy Configuration" procedure. If the "Copy Configuration" procedure fails, the injector codes must be loaded manually.Installing Injector CodesNote: The injector code is located on the electronic unit injector.
Record the injector code for each electronic unit injector.
Connect the electronic service tool to the diagnostic connector. Refer to Troubleshooting, "Electronic Service Tools".
Turn the keyswitch to the ON position.
Select the following menu options on the electronic service tool:
Service
Calibrations
Injector Trim Calibration
Select the appropriate cylinder.
Click on the "Change" button.
Input the applicable injector code that was recorded in Test Step 1.
Click on the "OK" button. The injector code is loaded into the ECM.
Repeat the procedure for each cylinder, as required. Exchanging Electronic Unit InjectorsExchanging 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 codes must 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.


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