Case IH 2364 (522818.12) - DEC – Transmission Control Unit (TCU): Driveline unit - MMP A\D 1 converter error

Fault code 2364 indicates that a specific clutch (Even Clutch or 1F coupling) is not calibrated. The MMP A/D converter error indicates an internal electrical fault or microprocessor failure where the Analog-to-Digital (A/D) converter inside the control unit is reading out of range or failing its self-test.

• MAXXUM T4E
• VESTRUM CVX
• Case IH Magnum 235 - 340 (Series 4)
• Case IH STX Steiger tractors (350 to 600 horsepower)

1. 1

   For Code 2364 (Clutch Calibration): Verify if the transmission has recently been serviced, if the battery was disconnected, or if the tractor requires a routine transmission calibration.

2. 2

   For MMP A/D Converter Error: Check the DC millivolt readings on the sensor signal lines to ensure they are not out of range (e.g., negative values or exceeding maximum voltage thresholds), which can trigger an A/D conversion error.

3. 3

   For MMP A/D Converter Error: Verify the sense voltage and excitation voltage at the control unit. If the sense voltage is disconnected or incorrect, the A/D converter can drift out of range.

4. 4

   For MMP A/D Converter Error: Check the TCU for external electrical damage or poor ground connections.

1. 1

   Address the Calibration (Code 2364)

   Initiate the transmission clutch calibration procedure via the tractor's display monitor or dealer diagnostic tool. Follow the on-screen prompts to calibrate the Even Clutch / 1F coupling.

2. 2

   Inspect wiring harness

   Address the Microprocessor Fault (MMP A/D Error): Inspect the wiring harness connecting the driveline sensors to the TCU for shorts or open circuits.

3. 3

   Diagnose TCU internal failure

   If the wiring is intact and the sense/excitation voltages are correct, the fault lies within the TCU's internal microprocessor (ROM/RAM failure or A/D converter hardware failure).

4. 4

   Replace TCU

   Replace the Transmission Control Unit (TCU) / Controller PCB, as internal microprocessor A/D failures are generally not field-repairable.

5. 5

   Program and calibrate new TCU

   Flash/program the new TCU with the correct machine software and perform a full transmission calibration.