FAN AS 2877062 - Caterpillar

The connection of any electrical equipment and the disconnection of any electrical equipment may cause an explosion hazard which may result in injury or death. Do not connect any electrical equipment or disconnect any electrical equipment in an explosive atmosphere.
Test Step 1. Record Injector Trim Codes
Use Table 1 to record the injector trim code and the corresponding cylinder number for each unit injector that will be replaced.
Table 1
Injector Trim Code    
Cylinder     Old     New    
1            
2            
3            
4            
5            
6            Note: If the ECM is replaced, all injector trim codes must be recorded. The injector trim codes can be found in "Calibrations" under the "Service" menu on the Caterpillar Electronic Technician (ET).Expected Result:All injector trim codes were obtained.Results:
OK - All injector trim codes were obtained. Proceed to Test Step 2.
Not OK - The injector trim codes were not obtained.Repair: Remove the valve cover and record the injector trim code and the corresponding cylinder number for each unit injector. Proceed to Test Step 2.Test Step 2. Replace Hardware
Remove electrical power from the ECM.
Replace the suspect unit injectors and/or the ECM.
Record the injector trim code and the corresponding cylinder number for each unit injector.Expected Result:All hardware was successfully replaced and the new injector trim codes were recorded.Results:
OK - The hardware was successfully replaced. Proceed to Test Step 3.Test Step 3. Enter Injector Trim Codes into the ECM
Connect Cat ET to the service tool connector.
Restore electrical power to the ECM.
Open the "Injector Codes Calibration" in "Calibrations" under the "Service" menu on Cat ET.
Enter the new injector trim code for each cylinder.Results:
OK - STOP