New Holland ENG 3367 – Engine Control Unit (Engine ECU / EDC7): Coolant Temperature Test Failure

The system flags this when it detects a 'Bad Intelligent Device or Component,' meaning the sensor is providing implausible readings, failing its internal self-test, or experiencing an electrical fault.

• T5
• T6
• T7
• T8
• T9
• TM120
• TM190
• T4
• CR9090
• CX8080 Elevation
• CX8090 Elevation
• B95
• L190
• LM1440
• T8.275
• T8.300
• T6000

1. 1

   Inspect the wiring harness and electrical connection at the sensor for security, moisture intrusion, galvanic corrosion, or damaged pins.

2. 2

   Test the sensor's electrical resistance to verify if it is within the specified OEM range for the current ambient temperature.

1. 1

   Cool Down

   Allow the engine to cool completely before attempting any repairs to avoid severe burns.

2. 2

   Relieve Pressure

   Safely relieve the cooling system pressure by carefully loosening the radiator/coolant reservoir cap.

3. 3

   Disconnect

   Unplug the electrical wiring harness from the existing coolant temperature sensor.

4. 4

   Remove Sensor

   Unthread the faulty sensor from the engine block or thermostat housing. Note: You will lose some coolant during this step, so have a catch pan ready.

5. 5

   Install New Sensor

   Thread in the new direct-replacement sensor. Many OEM sensors feature a sealed design to prevent moisture intrusion.

6. 6

   Reconnect

   Plug the wiring harness back into the new sensor, ensuring the connection is tight and secure.

7. 7

   Refill Coolant

   Top off the cooling system with the appropriate coolant to replace what was lost during removal, then run the engine to verify there are no leaks and that the temperature gauge reads accurately.