Fendt 1.2.53 – A022 - ECU EMR2: Difference between target control travel (ECU EMR2) and actual control travel (actuator) greater than 10%

The engine control unit commands the actuator to move the injection pump control rod to a specific target position. If the physical position of the rod reported by the position sensor differs from the commanded position by more than 10%, this fault is triggered.

• 409 Vario
• 410 Vario
• 411 Vario
• 412 Vario
• 711 Vario
• 712 Vario
• 714 Vario
• 715 Vario
• 716 Vario
• 717 Vario
• 718 Vario
• 916 Vario
• 920 Vario
• 924 Vario
• 926 Vario
• 930 Vario
• Fendt Farmer 400 series
• Fendt Favorit 700 series
• Fendt Favorit 900 series
• Fendt 300 Vario series
• Fendt 400 Vario series
• Fendt 700 Vario series
• Fendt 800 Vario series
• Fendt 900 Vario series

1. 1

   Manually check whether the injection pump control rod functions smoothly to rule out mechanical binding.

2. 2

   Check the wiring harness and connectors running from the Y035 actuator to the A022 ECU for damage, corrosion, or poor connections.

3. 3

   Connect the SERDIA (Deutz) diagnostic program to test the EMR actuator electronically.

1. 1

   Inspect the Control Rod

   Locate the Y035 EMR actuator on the engine. Disconnect the linkage/control rod and move it by hand. If it is stiff or binding, clean, lubricate, or repair the mechanical linkage until it moves freely.

2. 2

   Test the Actuator via SERDIA

   Use the SERDIA diagnostic tool to command the actuator to sweep through its travel range. Monitor the feedback from the position sensor.

3. 3

   Check Voltage/Wiring

   Verify that the actuator is receiving the correct operating voltage and PWM signals from the ECU, and that the 5V reference circuit for the position sensor is intact.

4. 4

   Replace the Actuator

   If the control rod moves smoothly but the actuator fails to reach the commanded position (or the internal position sensor has failed and is reporting incorrect values), replace the Y035 EMR actuator.

5. 5

   Recalibrate

   After replacing the actuator, use the SERDIA software to calibrate the new actuator to the EMR2 control unit.