Massey Ferguson E3511.31 – Engine ECU (AGCO SISU POWER EEM4): 5Vdc Supply 3 voltage out of range

The engine management monitoring system has detected an internal failure or an out-of-range voltage condition on the 5-volt sensor supply circuit number 3. This is typically caused by a short circuit in one of the sensors powered by this specific 5V line, a short in the wiring harness, or an internal failure within the ECU itself.

• 7616
• 5612
• 7622
• Interim Tier 4 (2012-2015)
• 7614
• 5611
• 7615
• 5610
• 5613
• 7620
• 5609
• 7618
• 5608
• 7619
• 7626
• 7624
• MF 4707
• MF 4708
• MF 4709
• MF 4710
• MF 5608
• MF 5609
• MF 5610
• MF 5611
• MF 5612
• MF 5613
• MF 5710 SL
• MF 5711 SL
• MF 5712 SL
• MF 5713 SL
• MF 7614
• MF 7615
• MF 7616
• MF 7618
• MF 7619
• MF 7620
• MF 7622
• MF 7624
• MF 7626
• MF 7714
• MF 7715
• MF 7716
• MF 7716S
• MF 7718
• MF 7718S
• MF 7719
• MF 7720
• MF 7720S
• MF 7722
• MF 7722S
• MF 7724
• MF 7724S
• MF 7726
• MF 7726S

1. 1

   Perform a sensor isolation test by disconnecting sensors on the 5V Supply 3 circuit one at a time to identify a shorted sensor

2. 2

   Inspect the 5V Supply 3 wiring harness for continuity to ground, short to voltage, chafing, melted insulation, or pinched wires

3. 3

   Verify ECU functionality by testing the system with a known-good replacement ECU if wiring and sensors are intact

1. 1

   Turn off the tractor and remove the key.

2. 2

   Locate the sensors that share the 5Vdc Supply 3 reference voltage.

   Refer to the specific machine's wiring diagram.

3. 3

   Disconnect the first sensor on the circuit.

   Turn the key on and check if the E3511.31 fault code goes inactive.

4. 4

   If the code remains active, turn the key off, reconnect the sensor, and move to the next sensor on the circuit.

   Repeat this process.

5. 5

   Replace the shorted sensor.

   If disconnecting a specific sensor causes the 5V supply to return to normal (clearing the code), replace that shorted sensor.

6. 6

   Test the engine wiring harness for a short to ground.

   If all sensors are disconnected and the code persists, thoroughly test the engine wiring harness for a short to ground. Repair or replace the harness if damage is found.

7. 7

   Remove the defective ECU and install a replacement.

   If the sensors and wiring harness both test perfectly, the Engine ECU (EEM4) has an internal power supply failure.

8. 8

   Program and activate the new ECU.

   Have an authorized dealer program and activate the new ECU using the AGCO Electronic Service Tool.