New Holland ENG 3220 – Engine Control Module (ECM): Bank2 - Application Dependent

An electrical anomaly detected on the fuel injector wiring circuit for 'Bank 2' of the engine (cylinders 4, 5, and 6), indicating a fault such as a short circuit, open load, or abnormal current draw.

• New Holland T8 series tractors
• Various New Holland combines, harvesters, and heavy equipment

1. 1

   Check for concurrent codes in the 3218–3225 range using the New Holland EST to narrow down if Bank 2 has a short-to-ground or an open circuit

2. 2

   Inspect the engine wiring harness routing from the ECM to the Bank 2 injectors for chafing, melted insulation (especially near exhaust or EGR), or pinched wires

3. 3

   Disconnect the Bank 2 injector harness connectors and check for oil wicking into the connectors or corrosion at the pins

4. 4

   Using a multimeter, measure the resistance across the solenoid pins of the Bank 2 fuel injectors to check for an internally shorted injector solenoid

5. 5

   Perform a continuity and short-to-ground test on the harness between the ECM connector and the injector connectors

1. 1

   Power down the machine, remove the key, and disconnect the negative battery cable to prevent electrical arcing.

   Power down the machine, remove the key, and disconnect the negative battery cable to prevent electrical arcing.

2. 2

   Gain access to the Bank 2 fuel injectors. If the engine uses an internal harness, remove the engine top cover and the valve cover.

   Gain access to the Bank 2 fuel injectors. If the engine uses an internal harness, remove the engine top cover and the valve cover.

3. 3

   Disconnect the main engine harness connector that supplies the injector sub-harness.

   Disconnect the main engine harness connector that supplies the injector sub-harness.

4. 4

   Carefully unclip and disconnect the individual injector connectors for the Bank 2 cylinders (typically cylinders 4, 5, and 6).

   Carefully unclip and disconnect the individual injector connectors for the Bank 2 cylinders (typically cylinders 4, 5, and 6).

5. 5

   If the harness failed the continuity test or shows physical damage, remove the retaining clips/bolts and extract the faulty injector wiring harness. (If an injector failed the Ohm test, replace the faulty injector).

   If the harness failed the continuity test or shows physical damage, remove the retaining clips/bolts and extract the faulty injector wiring harness. (If an injector failed the Ohm test, replace the faulty injector).

6. 6

   Install the new injector wiring harness. Ensure it is routed exactly as the factory intended, securing it away from high-heat sources and sharp vibration points.

   Install the new injector wiring harness. Ensure it is routed exactly as the factory intended, securing it away from high-heat sources and sharp vibration points.

7. 7

   Reconnect all injector terminals and seat the main ECM connector firmly.

   Reconnect all injector terminals and seat the main ECM connector firmly.

8. 8

   Reinstall the valve cover (using a new gasket if it was removed) and any access panels.

   Reinstall the valve cover (using a new gasket if it was removed) and any access panels.

9. 9

   Reconnect the battery. Connect the New Holland EST diagnostic tool, clear the inactive fault codes, and perform a test run to verify the repair.

   Reconnect the battery. Connect the New Holland EST diagnostic tool, clear the inactive fault codes, and perform a test run to verify the repair.