Case IH 2124 – Transmission Control Module: Flywheel torque sensor fitted in error or not calibrated

For 24x24 transmissions, the system detects a flywheel torque/speed sensor that should not be present. For 16x16 transmissions, the sensor is correctly fitted but lacks the required calibration data.

• Case IH Puma 140
• Case IH Puma 165
• Case IH Puma 185
• Case IH Puma 210
• Case IH Puma 225
• Case IH Puma 240
• Case IH Maxxum series
• Case IH Steiger series

1. 1

   Verify Transmission Type: Determine if the tractor is equipped with a 16x16 or a 24x24 transmission to identify the correct diagnostic path.

2. 2

   Check Controller Configuration (24x24 cause): Verify the Transmission Control Module's software configuration. Ensure it is not incorrectly programmed for a 16x16 transmission and check if a sensor was physically plugged into the harness that shouldn't be there.

3. 3

   Check Calibration Status (16x16 cause): Check if the battery was recently disconnected, the ECU was flashed, or the sensor was replaced, as this wipes the calibration memory.

4. 4

   Inspect Wiring: Check the wiring harness and connector to the flywheel speed/torque sensor for shorts or open circuits.

1. 1

   Warm up tractor

   For 16x16 Transmissions (Calibration Error): Warm the tractor up to standard operating temperature. Calibration cannot be performed if the transmission fluid is cold.

2. 2

   Enter calibration menu

   For 16x16 Transmissions: Enter the tractor's H8 calibration menu (Transmission Calibration) via the cab display.

3. 3

   Perform calibration

   For 16x16 Transmissions: Perform the transmission and flywheel torque sensor calibration procedure. The default calibration value for the PTO/flywheel torque sensor is typically set to 3999 during the H8 procedure.

4. 4

   Correct physical faults

   For 16x16 Transmissions: If the code 2124 displays during the calibration process, the fault condition (e.g., a wiring issue or a bad sensor) must be physically corrected before the adjustment will save.

5. 5

   Access configuration menu

   For 24x24 Transmissions (Fitted in Error): Access the transmission sub-system configuration menu.

6. 6

   Correct configuration settings

   For 24x24 Transmissions: Correct the controller's configuration settings to match the 24x24 transmission.

7. 7

   Disconnect sensor

   For 24x24 Transmissions: If the configuration is correct but the code persists, locate the flywheel torque sensor on the engine/transmission bell housing and physically disconnect it, as it is not supported by the 24x24 logic.

8. 8

   Clear codes and test

   For 24x24 Transmissions: Clear the fault codes and test the tractor by shifting the shuttle lever to forward and releasing the clutch pedal to ensure no error codes return.