Case IH 3757 (DTC E2DD) - ECU – Engine ECU (EDC): ECU internal failure - Post injection shut-off failure

This is an Electronic Diesel Control (EDC) Level 2 Monitoring fault. The ECU performs an internal diagnostic check and detects an error in the Post Injection 2 (PoI2) shut-off mechanism. Because the ECU cannot properly command or verify the shut-off of the post-injection cycle, it triggers this code to demand an Injection Cut-Off (ICO) to protect the engine.

• MAXXUM T4E
• Case IH 240 Series Axial-Flow Combines (7240, 8240, 9240)
• Case IH Steiger Tractors
• Case IH Magnum Tractors
• Case IH A8810 Sugarcane Harvesters

1. 1

   Connect the Case IH Electronic Service Tool (EST) to the machine's diagnostic port

2. 2

   Verify if the fault code 3757 (DTC E2DD) is currently active or stored

3. 3

   Prepare to reload the Engine Dataset to rule out software corruption, as this is an internal Level 2 monitoring error

1. 1

   Reflash the ECU

   Using the EST, reload the engine dataset to the Engine Controller.

2. 2

   Retest

   Cycle the key and run the engine to see if the fault code returns. If the code clears and does not return, the issue was a software anomaly and the repair is complete.

3. 3

   Replace the ECU

   If the fault code persists after reloading the engine dataset, the Engine Controller (EDC) has suffered a permanent internal hardware failure and must be replaced.

4. 4

   Restore Parameters

   If the EDC is replaced, you must follow the appropriate service tool procedure in the EST to restore the engine's Self-Learning Parameters to the new module.