Case IH 2371 – Transmission Control Unit (TCU): Creeper position out of range.

The sensor or potentiometer monitoring the physical engagement position of the creeper gear is returning a voltage or resistance value that falls outside of the factory-calibrated parameters, indicating the creeper is failing to fully engage/disengage mechanically, the sensor has lost its calibration, or the sensor/wiring has failed.

• Puma/Mid Range Magnum
• Puma 125
• Puma 150
• Puma 170
• Puma 185
• Puma 200
• Puma 210
• Puma 215
• Puma 230
• Magnum MX210
• Magnum MX230
• Magnum MX255
• Magnum MX285
• Magnum 235
• Magnum 340
• Maxxum 100
• Maxxum 110
• Maxxum 115
• Maxxum 120
• Maxxum 125
• Maxxum 130
• Maxxum 140
• Maxxum 150
• Maxxum 175
• Maxxum 190
• Farmall 40
• Farmall 45
• Farmall 50
• Farmall 110CL
• Farmall 115U

1. 1

   Verify that the tractor battery power supply has not been connected to an external power supply (like a jump box or external charger), as voltage irregularities can trigger false out-of-range codes.

2. 2

   Ensure the transmission oil is not cold. Warm the transmission fluid to between 60°C and 105°C (140°F - 221°F) before testing, as cold oil can prevent the creeper from fully engaging.

3. 3

   Inspect the creeper wire harness and the connector at the creeper position sensor for corrosion, moisture, or physical damage.

1. 1

   Prepare tractor for calibration

   Park the tractor on a flat surface in an open area, engage the parking brake, and ensure the engine is running.

2. 2

   Warm transmission fluid

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

3. 3

   Ensure stationary state

   Ensure the tractor is completely stationary and the clutch pedal is fully released.

4. 4

   Enter configuration menu

   Enter the configuration menu (on models like the Magnum, press and hold the 'Enter' key on the keypad within 10 seconds of turning the key switch to the ON position).

5. 5

   Navigate to transmission setup

   Navigate the menu: Select TCU -> ETC MENU -> TRANS VIEW -> TRANS SETUP.

6. 6

   Select calibration screen

   Select the Cltch Cal (Clutch/Transmission Calibration) or Creeper Cal screen.

7. 7

   Perform creeper calibration

   The system will prompt you to calibrate the creeper by manually engaging and then disengaging the creeper using the cab creeper switch.

8. 8

   Verify calibration success

   The display will show the applied and released positions. If the calibration is successful, the new end-stop values are saved, and the code should clear.

9. 9

   Replace sensor if calibration fails

   If the calibration fails or the code immediately returns, the creeper position sensor (potentiometer) is internally shorted/open and must be replaced, followed by a repeat of this calibration procedure.