RACE-THRUST BEARING 4N2927 - Caterpillar

System Operation Description:Use this procedure to troubleshoot the electrical system if a problem is suspected with the injectors or if any one of the diagnostic codes in Table 1 is active or easily repeated.
Table 1
Diagnostic Codes Table
Code and Description Conditions which Generate this Code System Response
1-5 Cylinder #1 Injector current below normal The engine's Electronic Control Module (ECM) detects an open circuit. The code is logged.
The ECM continues to fire the injector solenoid.
1-6 Cylinder #1 Injector current above normal The ECM detects a short circuit. The code is logged.
The ECM will disable the solenoid circuit. The ECM will periodically try to fire the injector. If the short circuit remains, this sequence of events will be repeated until the problem is corrected.
2-5 Cylinder #2 Injector current below normal The engine's ECM detects an open circuit. The code is logged.
The ECM continues to fire the injector solenoid.
2-6 Cylinder #2 Injector current above normal The ECM detects a short circuit. The code is logged.
The ECM will disable the solenoid circuit. The ECM will periodically try to fire the injector. If the short circuit remains, this sequence of events will be repeated until the problem is corrected.
3-5 Cylinder #3 Injector current below normal The engine's ECM detects an open circuit. The code is logged.
The ECM continues to fire the injector solenoid.
3-6 Cylinder #3 Injector current above normal The ECM detects a short circuit. The code is logged.
The ECM will disable the solenoid circuit. The ECM will periodically try to fire the injector. If the short circuit remains, this sequence of events will be repeated until the problem is corrected.
4-5 Cylinder #4 Injector current below normal The engine's ECM detects an open circuit. The code is logged.
The ECM continues to fire the injector solenoid.
4-6 Cylinder #4 Injector current above normal The ECM detects a short circuit. The code is logged.
The ECM will disable the solenoid circuit. The ECM will periodically try to fire the injector. If the short circuit remains, this sequence of events will be repeated until the problem is corrected.
5-5 Cylinder #5 Injector current below normal The engine's ECM detects an open circuit. The code is logged.
The ECM continues to fire the injector solenoid.
5-6 Cylinder #5 Injector current above normal The ECM detects a short circuit. The code is logged.
The ECM will disable the solenoid circuit. The ECM will periodically try to fire the injector. If the short circuit remains, this sequence of events will be repeated until the problem is corrected.
6-5 Cylinder #6 Injector current below normal The engine's ECM detects an open circuit. The code is logged.
The ECM continues to fire the injector solenoid.
6-6 Cylinder #6 Injector current above normal The ECM detects a short circuit. The code is logged.
The ECM will disable the solenoid circuit. The ECM will periodically try to fire the injector. If the short circuit remains, this sequence of events will be repeated until the problem is corrected. Perform this procedure under conditions that are identical to the conditions that exist when the problem occurs.