Case IH FCC – Transmission Control Unit (TCU): Clutch C Not Calibrated

The transmission controller has lost the calibration values for Clutch C, or a previous calibration procedure was not completed successfully. The primary symptom is poor clutch performance or harsh shifting on the uncalibrated clutch.

• MXM
• MXM 120
• MXM 130
• MXM 140
• MXM 155
• MXM 175
• MXM 190
• Magnum 340
• Puma Series
• Maxxum Series
• Steiger Series

1. 1

   Check Transmission Fluid Temperature: The transmission oil must be warmed up to between 60°C and 105°C (140°F+) for the calibration to run successfully.

2. 2

   Check for Accompanying Solenoid Codes: Look for other active fault codes (e.g., 2031, 2344, FAC, or F1C) that indicate a hard electrical failure. The solenoid or wiring harness must be repaired before calibration is possible.

3. 3

   Safety Check: Ensure the tractor is parked on a flat surface, the parking brake is applied, and the area is clear of bystanders.

1. 1

   Prepare tractor

   Move the tractor to an open, flat area free of obstacles.

2. 2

   Warm transmission oil

   Warm the transmission oil to at least 60°C (140°F).

3. 3

   Access CONFIG MENU

   Turn the key switch to the ON position. Within 10 seconds, press and hold the Enter key on the keypad to access the CONFIG MENU.

4. 4

   Select TCU

   Use the down arrow key to highlight TCU in the menu list and press Enter.

5. 5

   Access ETC MENU

   Navigate down to the ETC MENU screen and press Enter to access the transmission sub-menus (the TRANS VIEW screen will display).

6. 6

   Access TRANS SETUP

   Scroll down to the TRANS SETUP screen and press Enter.

7. 7

   Select Clutch Calibration

   Select the Cltch Cal (Clutch Calibration) screen and press Enter.

8. 8

   Verify oil temperature

   The screen will display the current oil temperature (Oil Deg). If the temperature is within the 60°C - 105°C range, press Enter to proceed.

9. 9

   Calibrate Clutch C

   Follow the on-screen prompts to allow the TCU to automatically cycle and calibrate Clutch C.

10. 10

    Investigate failures

    If the calibration fails repeatedly, you will need to investigate the Clutch C solenoid, the hydraulic circuit, or inspect the mechanical clutch pack for worn friction discs.