New Holland ENG 397 – Engine Controller (ENG / ECM): Rear Fueling current is too high

The engine controller has detected an abnormally high electrical current draw on the circuit responsible for the rear fueling actuator. This typically points to a short circuit in the wiring harness or an internal short within the actuator coil on the fuel injection pump.

• New Holland T8000 Series
• New Holland T8040
• New Holland TG Series
• New Holland TG 285
• New Holland T7.270

1. 1

   Inspect the wiring harness between the Engine ECM and the CAPS pump's rear fueling actuator for rubbed wires causing a short to ground or a short to another voltage source.

2. 2

   Inspect the electrical connectors at the CAPS pump for pushed pins, corrosion, or fluid intrusion.

3. 3

   Test the resistance of the rear fueling actuator on the CAPS pump. A dead short in the coil will cause the 'current is too high' condition.

1. 1

   Preparation

   Disconnect battery power. Locate the CAPS pump on the engine and remove the plastic lines to gain access.

2. 2

   Disconnect Lines

   Remove the main fuel line banjo fitting at the top, the 19mm fittings for the lower hoses, and unplug the electrical connectors.

3. 3

   Set Engine Timing

   Rotate the engine to Top Dead Center (TDC). Ensure the timing marks and the keyway hole on the pump align with the TDC mark.

4. 4

   Remove Pump

   Remove the top access cover to unscrew the gear nut. Remove the pump mounting bolts (there are two 15mm bolts; the top one is best accessed with an extension and a 15mm swivel socket).

5. 5

   Install New Pump

   Slide the remanufactured/new CAPS pump into place, ensuring the keyway is facing straight up and aligned with the engine timing marks.

6. 6

   Update Mounting Hardware

   If you are installing an updated/superseded CAPS pump, the new pump housing is thicker than the original. You MUST install an updated 'fuel strap' (mounting bracket) to secure it properly.

7. 7

   Reassembly

   Reinstall the 15mm mounting bolts, the gear nut, the 19mm fuel lines, the banjo fitting, and the electrical connectors. Clear the fault codes and test run the engine.