Case IH 111 – Engine Control Module (ECM): Engine Controller Failure — Hardware Failure

This fault code indicates a critical internal error within the engine controller. It is triggered when the module detects a memory hardware malfunction, a read/write error internal to the ECM, or an internal microprocessor communication/voltage supply failure. The engine may run rough, die unexpectedly, or fail to start entirely, and the red STOP ENGINE warning lamp will illuminate.

• MX Magnum
• STX Steiger
• MX180
• MX200
• MX210
• MX220
• MX230
• MX240
• MX245
• MX255
• MX270
• MX275
• MX285
• MX305
• STX275
• STX325
• STX375
• STX425
• STX440
• STX450
• STX500
• Axial-Flow series combines

1. 1

   Connect all components and turn the key switch to the ON position.

2. 2

   Connect a recommended electronic service tool (such as Jaltest or Cummins INSITE) to read the fault codes.

3. 3

   Verify if Fault Code 111 is Active or Inactive.

4. 4

   If the code is Active, the ECM has suffered a fatal internal failure. If the code is Inactive, check the inactive counts and verify if there are any performance-related complaints (such as intermittent stalling) before condemning the module.

1. 1

   Disconnect batteries

   Disconnect the tractor's batteries to prevent electrical arcing.

2. 2

   Locate ECM

   Locate the ECM. It is typically mounted on the left side of the engine block (intake manifold side), often behind the fuel filter.

3. 3

   Disconnect wiring

   Disconnect the engine wiring harness connectors from the ECM.

4. 4

   Remove ECM

   Unbolt the ECM from its mounting bracket (usually secured by heavy hex bolts and spacers).

5. 5

   Install replacement ECM

   Install the replacement ECM and reconnect the wiring harnesses.

6. 6

   Program ECM

   The new or remanufactured ECM must be flashed/programmed with the correct calibration file for your specific Engine Serial Number (ESN) and tractor model.

7. 7

   Validate repair

   Reconnect the batteries. Perform a key cycle, start the engine, and let it idle for 1 minute. Verify via the diagnostic tool that Fault Code 111 has changed to INACTIVE and the red STOP ENGINE lamp has turned off. Clear the inactive codes.