New Holland 3163 – ECM: Fan Drive No Load or Over Temp

This fault code has two distinct meanings depending on the tractor model and controller. For models like the T6000 (with CCM T3 / APH T3 2007 controllers), it indicates 'Fan Actuator - No Load', meaning the Engine Control Module (ECM) detects an open circuit in the fan drive actuator wiring, suggesting the fan is not engaging properly or receiving electrical input. For models like the T7 and T8, it indicates 'Fan Actuator - Temperature Too High', meaning the internal temperature of the electronic fan actuator has exceeded its maximum limit due to internal electronic failure or excessive heat transfer from a failing fan drive bearing.

• T6000 Series
• T7 Series
• T8 Series

1. 1

   Identify your tractor model and controller type to determine which definition of code 3163 applies.

2. 2

   (For No Load cause) Visually inspect the wiring harness leading to the viscous fan drive actuator (center of fan hub) for chafing, breaks, or corrosion.

3. 3

   (For No Load cause) Disconnect and inspect the electrical connector at the fan actuator for clean, properly seated pins.

4. 4

   (For Over Temp cause) Use an infrared thermometer to check the temperature of the fan hub after running, comparing it to coolant temperature to verify overheating.

5. 5

   (For Over Temp cause) With the engine off and cool, check the fan blade assembly for wobble, play, or roughness indicating a failing bearing.

6. 6

   (For Over Temp cause) Inspect the wiring and connector to the fan actuator for damage or corrosion that could lead to a short or high resistance.

1. 1

   Inspect and repair wiring (No Load cause)

   Check the electrical connector at the fan actuator. Ensure pins are clean and not pushed back. Re-seat firmly. Perform a continuity test on the wiring harness between the ECM and the fan actuator connector to identify any open circuits.

2. 2

   Test actuator resistance (No Load cause)

   Measure the resistance across the pins of the fan actuator. An infinite resistance reading indicates an open circuit within the actuator, meaning it is faulty and requires replacement.

3. 3

   Check for mechanical failure (Over Temp cause)

   If diagnosing an over-temperature condition, check the fan drive bearing for play or roughness. Clear the fault code and operate the tractor; if the code returns quickly without mechanical issues, the internal actuator electronics are likely failing.

4. 4

   Replace viscous fan drive

   If the actuator has infinite resistance, is overheating internally, or has a failed bearing, replace the entire viscous fan drive / fan clutch assembly.