Case IH FCF – Transmission Controller (TCU): Low Range Clutch Not Calibrated

Triggered when the transmission controller lacks a valid calibration value for the low range clutch. This condition typically occurs when the non-volatile memory in the controller has been reset, a new transmission controller has been installed, a PWM solenoid valve or potentiometer has been replaced, or a mechanical repair has been performed on the transmission.

• MXM
• MXM Series
• MXM 120
• MXM 130
• MXM 140
• MXM 155
• MXM 175
• MXM 190
• Maxxum Series
• Puma Series
• MX Series
• TG Series

1. 1

   Check transmission oil temperature to ensure it is between 10°C and 105°C (prevents U19, CL, or CH codes)

2. 2

   Ensure engine RPM is stable (prevents U21 or U22 codes)

3. 3

   Verify the shuttle lever is in the neutral position (prevents U23 code)

4. 4

   Check for active electrical fault codes related to the low range clutch solenoid (e.g., FA1, 109, or 2347)

5. 5

   Check battery voltage to ensure it is sufficient to operate clutch solenoids (prevents code 2809)

6. 6

   If calibration repeatedly fails, disconnect the low range clutch solenoid connector and measure resistance between terminal 1 and 2 (should be 8 - 11 Ohms)

1. 1

   Apply the parking brake.

2. 2

   Ensure there are no obstacles around the tractor in case of unexpected movement.

3. 3

   Lower all attached equipment to the ground.

4. 4

   Place all shift levers in the neutral position.

5. 5

   Block the wheels, both front and rear.

6. 6

   Press and hold the High and Low range buttons simultaneously, and start the engine.

7. 7

   Wait for 'CAL' to appear in the transmission display, then release the High and Low range buttons.

8. 8

   Set the engine speed to 1200 ERPM ± 100.

9. 9

   Follow the on-screen prompts to cycle through and calibrate the low range clutch (and any other uncalibrated clutches).