Massey Ferguson 520220.31 – Engine Control Unit (ECU) / EEM4: ECU Internal Fault 0113

ECU Internal Fault 0113 (Wrong set response time / MOCSOP Incorrect response time). This fault is related to the Monitoring Concept of the Redundant Shut-Off Paths (MoCSOP) self-test. The code triggers if there are incorrect ECU software settings or a physical hardware failure inside the ECU.

• 4710
• 7724S
• 5712SL
• Interim Tier 4 (2012-2015)
• 7722
• 7722S
• 7615
• 5613
• 5713SL
• 7720S
• 7716
• 7718
• T4
• 7715
• 5710SL
• 7726
• 7616
• 7618
• 5608
• 4708
• 7619
• 7626
• 7726S
• 7624
• 4707
• 4709
• 5711SL
• 7614
• 7718S
• 5610
• 7620
• 7719
• 7714
• 7716S
• T4 (2015-2021)
• 5612
• 7622
• 7720
• Tier 4 (2015-2021)
• 5611
• 7715S
• 5609
• 7724
• Massey Ferguson 7600 Series
• MF7615
• MF7600 Dyna-4/Dyna-6
• Massey Ferguson 8600 Series
• Massey Ferguson 7700 Series
• MF7722

1. 1

   Check battery voltage during engine cranking, as low voltage can cause the MoCSOP self-test to fail

2. 2

   Inspect the main power and ground feeds to the ECU, checking the ECU main relays for voltage drops or intermittent shorts to ground

3. 3

   Verify ECU software settings using a dealer diagnostic tool (WinEEM3/4 or FenDias) to check if a software update or re-calibration is available

1. 1

   Clear and Retest

   Clear the active fault code using a diagnostic tool. Cycle the ignition key off, wait for the ECU to power down completely, and turn the key back on to initiate a new driving cycle. If the code does not return, it may have been a transient voltage glitch.

2. 2

   Reflash the ECU

   If the code returns immediately upon key-on and all wiring/voltage checks pass, connect the AGCO electronic service tool and attempt to reflash the ECU with the latest software file.

3. 3

   Replace or Repair the ECU

   If the software update fails or does not resolve the code, the internal hardware of the ECU has failed the redundant shut-off path test. The ECU must be removed and either sent to an agricultural electronics repair specialist (e.g., UpFix) or replaced with a new OEM unit.

4. 4

   Program the New ECU

   If replacing the unit, the new ECU must be programmed to the specific tractor's VIN/serial number and injector trim codes using the dealer service tool.