Case IH 123 – MCC (Machine Control Cluster) or MIU (Machine Interface Unit): Model received does not match the model stored the first time the controller was powered up

This is a configuration and communication error. When a control module is powered up for the first time, it stores the specific machine model's configuration in its Non-Volatile Memory (NVM). Code 2378 triggers when the controller receives a model identifier over the CAN bus that contradicts the original model it was programmed for. This typically happens if a module was swapped from a different machine, if the display/monitor was replaced without proper configuration, or if there is a CAN bus data collision.

• STX Steiger
• Magnum
• Steiger
• Puma
• Early Riser planters

1. 1

   Verify Module History: Determine if the MCC, MIU, or the main cab display was recently replaced or swapped from a donor machine

2. 2

   Check CAN Bus Communication: Ensure there are no active CAN bus communication errors (such as codes 9000 or 9002) which might be corrupting the model identifier signal

3. 3

   Software Version Check: Verify that the software on the Display matches the implement/tractor and is not corrupted (checking for related codes like 1000 or 1001)

1. 1

   Connect diagnostic tool

   Connect the CNH Electronic Service Tool (EST) to the machine's diagnostic port.

2. 2

   Navigate to configuration

   Navigate to the controller configuration menu for the MCC/MIU.

3. 3

   Wipe and reprogram module

   If a module was recently installed from another machine, it must be wiped and reprogrammed to match the current machine's model configuration.

4. 4

   Push configuration file

   Push the correct machine configuration file from the EST to the controller to overwrite the mismatched NVM data.

5. 5

   Cycle power and clear code

   Cycle the key power. Re-scan the system to ensure Code 2378 changes from 'Active' to 'Inactive' and clear the code. Note: If the controller is hardware-locked to its original model, a blank, virgin OEM controller must be installed and programmed.