Case IH 17539 (F-518164-31) - ECU – Engine Control Module (ECM / ECU): ECM Internal Failure - Injection quantity limited by Level 2 controller check

The Engine Control Module (ECM) has detected an internal processing error or software discrepancy during its Level 2 background security/safety checks. As a protective measure, the ECM limits the fuel injection quantity, which will result in a noticeable engine derate or loss of power.

• VESTRUM CVX
• Magnum 180
• Magnum 200
• Magnum 220
• Magnum 240
• Magnum 250
• Magnum 280
• Magnum 310
• Magnum 340
• Magnum 380
• Magnum 400
• Maxxum 115
• Maxxum 125
• Maxxum 135
• Maxxum 145
• Maxxum 150
• Puma 140-240
• Optum 250-300
• Steiger 600 Quadtrac
• Axial-Flow 150 Series
• Axial-Flow 250 Series

1. 1

   Check for Accompanying Codes: Scan for any other active voltage, power supply, or grounding fault codes. A severe voltage drop or spike can sometimes cause the ECM's internal processor to fail a logic check.

2. 2

   Verify Power and Ground: Inspect the main power and ground harness connections to the ECM. Ensure the battery voltage is stable and the alternator is not overcharging.

3. 3

   Check Software Revision: Determine if the ECM software is out of date. Internal logic errors are frequently resolved by OEM software patches.

1. 1

   Connect Diagnostic Tool

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

2. 2

   Clear and Retest

   Clear the fault code and cycle the key. Operate the machine to see if the code returns. If it was a transient software glitch, it may not return.

3. 3

   Reflash the ECM

   If the code is hard-set or returns immediately, use the CNH EST to flash the ECM with the latest software calibration file.

4. 4

   Replace the ECM

   If the software update fails to clear the code, or if the ECM refuses to take the flash, the internal hardware of the ECM has failed. The ECM must be physically replaced.

5. 5

   Program New ECM

   Install the new ECM and use the CNH EST to program the module with the tractor's specific PIN, injector trim codes, and configuration files.