WASHER 0L0261 - Caterpillar

This procedure covers the following diagnostic codes:
Table 1
Diagnostic Trouble Codes for Injector Solenoid
J1939 Code Code Description Comments
651-3 Engine Injector Cylinder #01 : Voltage Above Normal These diagnostic codes indicate an open circuit (low current) in either the solenoid or the wiring for the electronic unit injector.
The Electronic Control Module (ECM) detects the following conditions:
A low current condition (open circuit)
Battery voltage above 9 VDC for 2 seconds
The warning light will come on. The ECM will log the diagnostic code.
The engine will have low power and/or rough running.
When an "Cylinder Cutout Test" is performed, a faulty electronic unit injector will indicate a low reading in comparison with the other electronic unit injectors.
The ECM will continue to attempt to operate the electronic unit injector after the diagnostic code has been logged. An open circuit will prevent the operation of the electronic unit injector.
652-3 Engine Injector Cylinder #02 : Voltage Above Normal
653-3 Engine Injector Cylinder #03 : Voltage Above Normal
654-3 Engine Injector Cylinder #04 : Voltage Above Normal
(4 cylinder engines only)
2797-3 Engine Injector Group 1 : Voltage Above Normal 3 Cylinder Engines: These diagnostic codes indicate a fault in the common circuit in the ECM that supplies power to electronic unit injector 1 and 3.
4 Cylinder Engines: These diagnostic codes indicate a fault in the common circuit in the ECM that supplies power to electronic unit injectors 1 and 4.
Contact the Dealer Solutions Network (DSN).
2797-4 Engine Injector Group 1 : Voltage Below Normal
2797-5 Engine Injector Group 1 : Current Below Normal
2798-3 Engine Injector Group 2 : Voltage Above Normal 3 Cylinder Engines: These diagnostic codes indicate a fault in the circuit in the ECM that supplies power to electronic unit injector 2.
4 Cylinder Engines: These diagnostic codes indicate a fault in the common circuit in the ECM that supplies power to electronic unit injectors 2 and 3.
Contact the Dealer Solutions Network (DSN).
2798-4 Engine Injector Group 2 : Voltage Below Normal
2798-5 Engine Injector Group 2 : Current Below Normal
Follow the troubleshooting procedure to identify the root cause of the fault. Perform this procedure under conditions that are identical to the conditions that exist when the fault occurs. Typically, electronic unit injector solenoid faults occur when the engine is warmed up and/or when the engine is under vibration (heavy loads).The engine has Electronic Unit Injectors (EUI). The ECM sends a pulse to each injector solenoid. The pulse is sent at the correct time and at the correct duration for a given engine load and speed. The solenoid is mounted on top of the electronic unit injector body.An electrical fault can prevent the electronic unit injector from operating. An open circuit in the ECM that is unique to one electronic unit injector will prevent that electronic unit injector from operating. An open circuit in common wiring within the ECM can prevent the two electronic unit injectors that share that common wiring from operating.If an open circuit is detected in the solenoid circuit, a diagnostic code is generated. The ECM continues to try to fire the