DIFFERENTIAL & BEVEL GEAR GP 1616344 - Caterpillar

Table 1
Diagnostic Codes Table    
CDL Code and Description    Conditions which Generate this Code    System Response    
1495-2 Injector Trim Codes Not Programmed     The ECM detects that one or more of the injector trim codes has not been programmed. The ECM has been powered for three seconds.     The code is logged in memory. The engine will start. The ECM will use a default setting of 0000 for an unprogrammed injector trim code.    The engine ECM detects that one or more of the injector trim codes have not been programmed. The injector code is a number that is found on each of the unit injectors. The ECM uses this number to compensate for manufacturing variations between individual injectors.Note: Changing the injector trim codes will not increase the power that is available to the engine.
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 2 to record the injector trim code and the corresponding cylinder number for each unit injector that will be replaced.
Table 2
Injector Trim Codes    
Cylinder Number    Old Trim Codes    New Trim Code    
1            
2            
3            
4            
5            
6            
7            
8            
9            
10            
11            
12            
13            
14            
15            
16            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 covers 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 the 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