New Holland 3680 – Engine ECU: Injection Cut Off Demand for Shut Off Coordinator

The Engine Control Unit (ECU) has received a command to cut off fuel injection from the shut off coordinator. This indicates a condition where the injection process is being interrupted or commanded to stop by the shut off coordinator, an internal ECU function that manages the engine shutdown sequence. This fault implies that a critical condition has been met requiring the engine to be stopped by halting the fuel supply.

• L220
• W50C
• W60C
• W70C
• W80C
• L180
• L190
• C190
• LS180
• LS190
• LS180B
• LS190B
• LT190B
• TS100
• 555E
• TS110
• 655E
• 575E
• TS115
• HW320
• 4610N
• TS90
• 675E

1. 1

   Verify other active fault codes, as the shut off coordinator may be triggered by a separate, more specific critical fault (e.g., engine overspeed or severe drop in oil pressure)

2. 2

   Inspect the fuel shutoff solenoid wiring and connectors for any signs of damage, corrosion, or loose connections

3. 3

   Perform an audible check of the fuel shutoff solenoid by listening for a distinct 'click' when the ignition is turned on

4. 4

   Perform a voltage test using a multimeter to verify the solenoid is receiving the correct voltage when the key is in the 'run' position

5. 5

   Inspect all fuses and relays related to the engine control system and fuel system

6. 6

   Inspect the fuel system for obvious fuel leaks or restrictions in the fuel lines

1. 1

   Address other faults

   If other critical fault codes are present, diagnose and repair them first, as they are likely commanding the shutdown.

2. 2

   Repair wiring

   If any damaged wires or corroded connectors are found during the inspection of the fuel shutoff solenoid circuit, repair or replace them. Ensure all connections are clean and secure.

3. 3

   Replace fuses or relays

   If a blown fuse or faulty relay is identified in the engine control or fuel system circuits, replace it with a new one of the correct amperage.

4. 4

   Replace the fuel shutoff solenoid

   If diagnostic checks point to a faulty fuel shutoff solenoid (e.g., no click when power is applied, internal short or open circuit), replace the component.

5. 5

   Clear fault codes

   After performing repairs, clear the fault codes using a diagnostic tool and run the machine to ensure the fault does not return.