New Holland ENG 382 – Engine Controller (ENG / Engine ECU): Error detected in cold start relay 2

The Engine Control Module has detected an electrical malfunction in the circuit for the secondary cold start relay, such as an open circuit, a short to ground, or a short to power in the relay's control or load side.

• T9 Series
• T9000 Series
• Boomer/TC compact series
• CR7.90
• CR9090
• CX8080
• CX8090
• Magnum
• Steiger

1. 1

   Perform a battery load test to ensure voltage doesn't drop significantly under load, which can cause the relay to fail to engage.

2. 2

   Visually inspect Cold Start Relay 2 and its socket in the engine compartment fuse/relay box for melted plastic, burnt pins, or heavy corrosion.

3. 3

   Bench test the relay with a multimeter to check resistance across coil pins and continuity across switch pins when 12V is applied.

4. 4

   Check the wiring harness between the Engine ECU and the relay block for chafing, broken wires, or a short to ground.

1. 1

   Disconnect Power

   Turn off the ignition and disconnect the negative battery cable to prevent accidental shorts.

2. 2

   Access the Relay

   Open the engine compartment fuse/relay box and locate Cold Start Relay 2 (refer to the specific machine's fuse diagram on the inside of the lid).

3. 3

   Clean the Circuit

   If the relay socket shows signs of dirt or light corrosion, spray it with electrical contact cleaner and let it dry.

4. 4

   Replace the Relay

   If the relay failed the bench test or is visibly damaged, plug a new OEM relay into the socket. Ensure it is seated firmly.

5. 5

   Restore Power

   Reconnect the negative battery cable.

6. 6

   Test the System

   Turn the key to the ON position (do not crank immediately). Wait for the cold start/wait-to-start light to cycle. Listen for the audible "click" of the relay engaging.

7. 7

   Clear Codes

   Connect a diagnostic scanner (such as the CNH Electronic Service Tool) to clear the inactive ENG 382 code from the Engine ECU memory.