WORM 5H0284 - Caterpillar

This procedure covers the following diagnostic trouble codes:
Table 1
Diagnostic Codes Table
J1939 Code CDL Code Code Description
(code descriptions may vary) Comments
651-5 1-5 Cylinder #1 Injector : Current Below Normal These codes relate to the electrical circuit that includes injector terminals 1 and 3.
651-6 1-6 Cylinder #1 Injector : Current Above Normal
652-5 2-5 Cylinder #2 Injector : Current Below Normal
652-6 2-6 Cylinder #2 Injector : Current Above Normal
653-5 3-5 Cylinder #3 Injector : Current Below Normal
653-6 3-6 Cylinder #3 Injector : Current Above Normal
654-5 4-5 Cylinder #4 Injector : Current Below Normal
654-6 4-6 Cylinder #4 Injector : Current Above Normal
655-5 5-5 Cylinder #5 Injector : Current Below Normal
655-6 5-6 Cylinder #5 Injector : Current Above Normal
656-5 6-5 Cylinder #6 Injector : Current Below Normal
656-6 6-6 Cylinder #6 Injector : Current Above Normal
3659-5 2602-6 Cylinder #1 Injector Actuator #2 : Current Above Normal These codes relate to the electrical circuit that includes injector terminals 2 and 4.
3659-6 2602-5 Cylinder #1 Injector Actuator #2 : Current Below Normal
3660-5 2604-6 Cylinder #2 Injector Actuator #2 : Current Above Normal
3660-6 2604-5 Cylinder #2 Injector Actuator #2 : Current Below Normal
3661-5 2606-6 Cylinder #3 Injector Actuator #2 : Current Above Normal
3661-6 2606-5 Cylinder #3 Injector Actuator #2 : Current Below Normal
3662-5 2608-6 Cylinder #4 Injector Actuator #2 : Current Above Normal
3662-6 2608-5 Cylinder #4 Injector Actuator #2 : Current Below Normal
3663-5 2610-6 Cylinder #5 Injector Actuator #2 : Current Above Normal
3663-6 2610-5 Cylinder #5 Injector Actuator #2 : Current Below Normal
3664-5 2612-6 Cylinder #6 Injector Actuator #2 : Current Above Normal
3664-6 2612-5 Cylinder #6 Injector Actuator #2 : Current Below Normal Background InformationThese engines have Electronic Unit Injectors (EUI) that are electronically controlled. Each injector contains two solenoids. The Engine Control Module (ECM) sends 105 v pulses to each injector solenoid. The pulses are sent at the proper time and at the correct duration for a given engine load and speed.The ECM monitors the current flow through the circuit for each solenoid. If low current flow is detected, a diagnostic code is activated. The ECM continues to try to fire the injector.If high current flow is detected, a diagnostic code is activated. The ECM will disable the solenoid circuit to prevent damage from the high current flow. However, 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.Typically, problems with an injector solenoid occur when the engine is warmed up and/or when the engine is under vibration (heavy loads). Perform this procedure when the engine is at normal operating temperature. Pay careful attention to the condition of the wiring and the connectors as you perform this procedure. The wiring and/or the connectors may have problems that only occur during vibration.Diagnostic Tests on the Cat® Electronic Technician (ET)Cat ET includes the following test that aids in troubleshooting injector solenoids:Injector Solenoid Test - The Injector Solenoid Test identifies an open circuit or a short circuit in the circuits for the injector