Case IH 2029 (517967.13) - DEC – Transmission Control Unit (TCU): Clutch B not calibrated

This fault code indicates that the transmission controller has detected that the calibration values for 'Clutch B' are missing, invalid, or out of tolerance. This condition disables the transmission or results in poor clutch performance.

• VESTRUM CVX
• Maxxum / MXM Series (MXM 120, 130, 140, 155, 175, 190)
• Puma Series (165, 180, 195, 210, 225)
• Magnum Series
• Steiger Series
• Farmall Pro EP Series (95U, 105U, 115U)

1. 1

   Ensure the transmission oil temperature is at operating temperature (must be above 10°C or 20°C depending on the specific model).

2. 2

   Ensure the engine RPM is within the specified calibration range (not too high or too low).

3. 3

   Verify operator controls are set correctly for calibration: shuttle lever in neutral, clutch pedal fully released, handbrake applied, and seat switch activated.

4. 4

   Check for other active fault codes related to the Clutch B solenoid (e.g., open circuit, short to ground, or pressure not plausible). Calibration cannot be completed if a solenoid fault exists.

1. 1

   Warm up tractor

   Warm up the tractor until the transmission fluid reaches the required operating temperature.

2. 2

   Enter calibration mode

   Enter the transmission calibration mode (often accessed via the H-Menu on the instrument cluster or display).

3. 3

   Follow prompts

   Follow the on-screen prompts to calibrate the clutches. The display will typically cycle through the clutches (A, B, C, D, E).

4. 4

   Calibrate Clutch B

   When the display shows 'b', indicating Clutch B is ready, press and hold the designated calibration switch (often the downshift button).

5. 5

   Hold calibration switch

   Hold the button until the engine speed decreases by a specified amount (usually 50 RPM) and the calibration number on the display stops increasing.

6. 6

   Calibrate remaining clutches

   Release the button and proceed to calibrate the remaining clutches and synchronizers as prompted by the display.

7. 7

   Store calibration values

   Once all calibrations are complete (the display may show 'F' or 'CF'), turn the key start switch OFF for at least 2 seconds to store the new calibration values in the TCU memory.

8. 8

   Check for hardware faults

   If the calibration fails repeatedly, the processor may be faulty, or there is a mechanical/hydraulic fault with the Clutch B solenoid valve.