Massey Ferguson T41D9 – Transmission Control Unit (TCU) / Autotronic 4 or Autotronic 5: Calibration error

The transmission calibration process failed, was interrupted, or sensor values fell out of the acceptable tolerance ranges during the calibration attempt.

• Massey Ferguson 8600 Series (8650, 8660, 8670, 8680, 8690)

1. 1

   Ensure the transmission oil temperature is at least 40°C (104°F)

2. 2

   Verify the transmission oil level is between the nominal and maximum marks

3. 3

   Ensure the tractor is parked on flat ground

4. 4

   Verify the hand brake is applied or the ParkLock is engaged

5. 5

   Ensure the Power Control lever is in the Neutral position

6. 6

   Verify the Hare range is engaged

7. 7

   Check for other active transmission fault codes (such as T4105, T4107, or T41E0) and resolve them before attempting calibration

1. 1

   Satisfy preliminary conditions

   Satisfy all preliminary conditions listed above (40°C temp, Neutral, Hare range, ParkLock engaged).

2. 2

   Access CAL1 screen

   Access the instrument panel DIAG mode via the Dash Control Center or use the dealer diagnostic tool to navigate to the CAL1 screen.

3. 3

   Start calibration

   Press 'OK' to start the calibration.

4. 4

   Observe engine speed

   The engine speed will automatically adjust to 1600 rpm.

5. 5

   Observe dash symbols

   The Hare and Tortoise symbols on the dash will flash alternately.

6. 6

   Allow calibration to run

   Allow the calibration to run. It takes place in 7 steps (calibrating the hydraulic motors and pumps) and lasts for approximately 6 seconds.

7. 7

   Observe calibration result

   Observe the display for the result: 'OK' means successful, 'ERROR' means failed. If it fails, diagnose and repair the underlying hardware fault before retrying.

8. 8

   Save calibration values

   Switch off the ignition for at least 30 seconds to validate and save the new calibration values to the Autotronic controller.