Massey Ferguson 1188.13 – Engine Control Unit (ECU) / EEM (Electronic Engine Management): Turbo Waste Gate Actuator Issue / WG Actuator 1 calibration error (ERROR 4)

Sets when the electronic wastegate actuator's self-learn procedure falls outside of the acceptable calibration window. This typically means the actuator motor cannot find its correct end-stops, which is usually caused by a defective actuator motor, a bent/loose actuating rod, or a mechanically stuck wastegate flap inside the turbocharger.

• 4710
• 7724S
• 5712SL
• 7722S
• 7722
• 5713SL
• 7720S
• 7716
• 7718
• T4
• 7715
• 5710SL
• 7726
• 4708
• 7726S
• 4707
• 4709
• 5711SL
• 7718S
• 7719
• 7714
• 7716S
• T4 (2015-2021)
• 7720
• Tier 4 (2015-2021)
• 7715S
• 7724
• 4700 Series
• 5600 Series
• 5700 Series

1. 1

   Save the current error log in your diagnostic tool, then clear the codes

2. 2

   Restart the ECU/tractor after clearing the log (Power Cycle)

3. 3

   Run the machine through a drive cycle to see if the fault returns

4. 4

   Physically inspect the Wastegate (WG 1) actuator assembly, checking the control shaft and actuating rod for defects, binding, or a loose flap

5. 5

   If the linkage moves freely without binding, plug the harness into a known-good wastegate actuator to verify if the original actuator's internal position sensor/motor has failed

1. 1

   Access the Turbocharger

   Ensure the engine is cool. Remove any side panels or heat shields necessary to access the turbocharger and electronic wastegate actuator.

2. 2

   Disconnect the Linkage

   Remove the retaining clip holding the actuating rod to the turbocharger's wastegate lever.

3. 3

   Test the Wastegate Flap

   Manually actuate the wastegate lever on the turbo housing. It should move smoothly without excessive play or binding. If it is seized, the entire turbocharger may need to be replaced or rebuilt.

4. 4

   Replace the Actuator

   If the flap moves freely, the electronic actuator is at fault. Disconnect the electrical harness from the actuator.

5. 5

   Dismount the Actuator

   Remove the mounting bolts securing the actuator bracket to the turbocharger and remove the unit.

6. 6

   Install the New Actuator

   Mount the new actuator (and new actuating rod if necessary) and secure the bolts. Reattach the linkage to the wastegate lever and install a new retaining clip.

7. 7

   Reconnect Harness

   Plug the ECU wiring harness back into the actuator.

8. 8

   Software Calibration

   Connect your diagnostic service tool (WinEEM4 or equivalent dealer tool) and initiate the wastegate actuator self-learn/calibration procedure so the ECU can learn the new physical end-stops.

9. 9

   Clear Codes

   Clear any remaining inactive codes and test run the tractor under load to ensure boost pressure is regulated correctly.