New Holland FCA – Transmission Controller: Clutch A Not Calibrated

This fault code indicates that the transmission controller does not have a valid calibration value stored for the "A" clutch. This underlying condition results in poor clutch performance (harsh engagement or poor feathering) or the transmission being completely disabled until a successful calibration is performed.

• TM Series (TM120
• TM135
• TM150
• TM165
• TM175
• TM190)
• MXM Series (MXM120 - MXM190)
• T7 Series and T7000 Series
• TS and TL Series
• Older 40 Series
• 60 Series
• and Genesis 70 Series (e.g.
• 8670)

1. 1

   Check transmission oil temperature — it must be at operating temperature (between 10°C and 59°C, ideally around 50°C). If it is too cold, a U19 error will occur.

2. 2

   Ensure the engine can hold a steady 1200 +/- 50 RPM.

3. 3

   Verify operator controls are in the correct state: handbrake applied, clutch pedal fully released, and seat switch activated.

4. 4

   Check for active 'U' codes (e.g., U21 Engine RPM too low, U23 Shuttle lever in neutral, U26 Clutch pedal not released, U36 Maximum allowed clutch calibration value exceeded) if calibration fails to start.

5. 5

   If calibration repeatedly fails, inspect for hardware issues: check the Clutch A solenoid for open circuits or shorts to ground, inspect the hydraulic circuit, or check for a mechanical fault inside the clutch pack.

1. 1

   Apply the handbrake.

   Ensure the handbrake is applied before starting the calibration procedure.

2. 2

   Enter calibration mode.

   Press and hold both the upshift and downshift buttons whilst starting the tractor to enter calibration mode.

3. 3

   Verify transmission oil temperature.

   The display will show the temperature of the transmission oil in degrees Celsius.

4. 4

   Set the engine RPM.

   Set the engine RPM to 1200 +/- 50.

5. 5

   Place the shuttle lever in the FORWARD position.

   Move the shuttle lever to FORWARD.

6. 6

   Select Clutch A.

   Press the upshift button to select Clutch A.

7. 7

   Calibrate Clutch A.

   Press and hold the downshift button to calibrate Clutch A.

8. 8

   Wait for calibration to complete.

   Keep the downshift button depressed until the engine speed decreases by 50 RPM and the calibration number on the display stops increasing and alternates with the clutch identifying letter ("A").

9. 9

   Release the downshift button.

   The display will change to 'b', indicating that Clutch B is ready for calibration. (Note: It is highly recommended to continue and calibrate all clutches B, C, D, and E while in this mode).

10. 10

    Store the new calibration figures.

    Once finished, turn OFF the key-start to store the new calibration figures in the transmission controller.