Fendt 4.1.72 – Transmission Control Module: S017 - 'Transmission oil filter clogged' switch — Signal fault

This fault code indicates a signal failure (such as an open circuit, short circuit, or defective sensor) originating from the S017 filter contamination switch. Because of this signal loss, the tractor's computer can no longer monitor the transmission oil filter for clogging. If ignored, this condition can lead to oil overheating and severe transmission damage, as the operator will not be warned if the filter becomes restricted.

• 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
• 411 Vario COM III
• 412 Vario COM III
• 413 Vario COM III
• 414 Vario COM III
• 415 Vario COM III
• 712 Vario COM III
• 714 Vario COM III
• 716 Vario COM III
• 718 Vario COM III
• 818 Vario COM III
• 820 Vario COM III
• Farmer 400 Vario series
• Favorit 700 and 900 Vario series
• 300, 400, 700, 800, and 900 Vario (COM I, COM II, COM III, and S4 generations)

1. 1

   Check transmission oil temperature (must be above 50°C to accurately test the switch's live function)

2. 2

   Inspect the wiring harness and connector at the S017 switch for line discontinuities, corrosion, or short circuits

3. 3

   Physically inspect the transmission oil filter for heavy contamination or being overdue for a change

1. 1

   Warm Up the Machine

   Run the tractor until the transmission oil temperature exceeds 50°C.

2. 2

   Test the Circuit

   Disconnect the S017 switch and use a multimeter to check for continuity and proper voltage on the signal wire going back to the Transmission Control Module.

3. 3

   Repair Wiring (If Applicable)

   If a break or short is found in the harness, repair the damaged section of the wiring.

4. 4

   Replace the Switch

   If the wiring tests good but the signal fault persists, the S017 switch itself has failed internally and must be replaced.

5. 5

   Replace the Filter

   If the transmission oil filter is clogged, drain the necessary fluid, remove the old filter, and install a new OEM transmission oil filter.

6. 6

   Clear Codes and Test

   Top off the transmission fluid if any was lost, clear the fault codes via the tractor's terminal, and test drive the machine to ensure the code does not return.