Massey Ferguson 520214.31 – AGCO SISU POWER EEM4: ECU internal fault 0107

The Engine Control Unit (ECU) has detected an internal hardware or software anomaly. The ECU continuously monitors the analog-to-digital converter (ADC) using known reference voltages. If the measured voltage ratio falls outside the expected parameters, the ECU flags this internal monitoring failure.

• 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 tractors

1. 1

   Perform a system reset by turning the ignition off for a minimum of 60 seconds to allow the ECU to power down completely and reset, then turn it back on to see if the code clears.

2. 2

   Ensure the tractor's battery voltage is stable and the charging system is operating correctly, as severe voltage spikes or drops can trigger false ADC monitoring errors.

3. 3

   Look for other active fault codes (such as sensor supply voltage codes) that might be dragging down the internal 5V reference circuit and causing the ADC error.

4. 4

   Verify the vehicle's main power switch is operating correctly and not interrupting power prematurely during the ECU's shutdown cycle.

1. 1

   Turn off the ignition and disconnect the vehicle's battery.

2. 2

   Locate the EEM4 Engine Control Unit on the engine block.

3. 3

   Carefully disconnect the EEM4 controller's main wiring harness connectors.

   Note: Do not perform electric welding on the machine without disconnecting these first, as it can cause this exact type of internal ECU damage.

4. 4

   Unbolt and remove the defective EEM4 ECU.

5. 5

   Install the replacement ECU and reconnect the main wiring harnesses.

6. 6

   Reconnect the battery.

7. 7

   Program the new ECU.

   The new ECU will be blank or in a base state. You must connect the AGCO Service Tool (WinEEM3/4 or FenDias) via the CAN bus diagnostic port to flash the ECU with the correct software and engine maps for your specific tractor model.