Fendt 1.2.01 – EMR (Electronic Motor Regulation) / Engine ECU: EMR Camshaft Sensor Signal Error

Signal error from the EMR camshaft sensor indicating that the physical gap between the sensor and the camshaft sprocket is too wide, or that the cable connection to the sensor is broken.

• 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
• Farmer 400 series
• Favorit 700 and 900 series
• Fendt 300, 400, 700, 800, and 900 Vario series

1. 1

   Wiring Inspection: Inspect the wiring harness and connector leading to the B041 camshaft sensor. Look for broken cables, chafing, or loose pins.

2. 2

   Sensor Gap Check: Inspect the physical mounting of the camshaft sensor. Verify that the sensor has not backed out and that the air gap between the sensor tip and the camshaft sprocket is not too wide.

3. 3

   Redundancy Verification: Ensure the B042 crankshaft sensor is functioning correctly, as the engine is currently relying entirely on it to maintain RPM control.

1. 1

   Locate sensor

   Locate the B041 camshaft position sensor on the engine block.

2. 2

   Test wiring

   Disconnect the sensor's electrical connector and test the wiring harness back to the EMR module for continuity to rule out a broken cable. Repair any wiring faults found.

3. 3

   Remove sensor

   If the wiring is intact, remove the sensor retaining bolt and extract the old sensor.

4. 4

   Clean mounting surface

   Clean the mounting surface to ensure no debris is preventing the sensor from seating fully (which would cause a 'gap too wide' error).

5. 5

   Install new sensor

   Install the new camshaft sensor and secure it, ensuring it is seated to the factory depth specification.

6. 6

   Reconnect wiring

   Reconnect the wiring harness.

7. 7

   Clear fault code

   Connect the tractor to the SERDIA diagnostics tool to clear the stored 1.2.01 / B041 fault code from the EMR memory.

8. 8

   Verify repair

   Start the engine and verify that the fault does not return and that the engine speed is read correctly.