Massey Ferguson 520224.31 – Engine Control Unit (ECU) / AGCO Power / SisuDiesel EEM4: Engine Module Internal Issue (ECU) - OS timeout in the shut off path test
Issue description
The engine computer's operating system timed out while running an internal safety self-test (MOCSOP - redundant stop test), resulting in an internal fault (ECU internal fault 0117).
Applies to these machines
49 machines- 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
- 7714S
- 7719S
- 5710 SL
- 5711 SL
- 5712 SL
- 5713 SL
Check the cause
Connect the AGCO Electronic Diagnostic Tool (EDT) and test the original EEM4 unit with the latest software to ensure an outdated OS or software glitch is not the cause of the timeout.
Temporarily connect a known-good EEM4 controller to cross-check operation. If the system functions and the fault clears, the original ECU is definitively defective.
Repair steps
Connect EDT device
Connect the EDT device to the tractor and select the correct tractor model.
Save engine log
Open the 'Diagnostic Test' page, select 'Save & Upload Engine Log', and save the engine log information to your desktop.
Save IQA codes
Open the 'Calibration' tab and check the IQA (Injector Calibration) codes. Save these codes for later use.
Initiate ECU replacement
Open 'Configuration', select 'Engine ECU Replacement', and push the start button.
Deactivate old EEM4 unit
Click 'Continue Step 1', turn the ignition switch to OFF, and wait exactly 2 minutes until the power is completely cut off from the tractor's control units.
Install new EEM4 unit
Physically remove the old ECU and install the new EEM4 unit. Caution: Use only a NEW EEM4 spare part to avoid permanently adding incorrect engine hours.
Activate new EEM4 unit
Turn the ignition switch to ON. The EDT will read the serial number of the new EEM4 unit and activate it.
Write configuration
Follow the remaining on-screen EDT prompts to write the saved IQA codes and engine configuration to the new module.
Parts you might need
(3)Engine Control Unit (ECU) / EEM4 Controller
0281020301Bosch (Hardware variant EEM4-H411). Verify exact hardware variant printed on original ECU label.
Engine Control Unit (ECU) / EEM4 Controller
0281020170Bosch (Hardware variant EEM4-E401). Verify exact hardware variant printed on original ECU label.
Engine Control Unit (ECU) / EEM4 Controller
V837074863Example AGCO part number. Fits AGCO Power / Sisu engines.
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