Fendt 05.1.54 – Basic Control Unit ECU (EXT) / Transmission Control System (A050): S006 - Switch, left brake

The system has detected a signal fault or a faulty switch on the left brake pedal. The Tractor Management System (TMS) is automatically switched off, and the system defaults to a safety state where the '100% differential lock' is the only function still available.

• 922 Vario COM III
• 924 Vario COM III
• 927 Vario COM III
• 930 Vario COM III
• 933 Vario COM III
• 936 Vario COM III
• 300 Vario series (e.g., 311, 312)
• 400 Vario series (e.g., 409, 410, 411, 412)
• 700 Vario series (e.g., 711, 712, 714, 716)
• 800 Vario series (e.g., 815, 817, 818, 820 TMS)
• 900 Vario series (e.g., 916, 920, 924, 926, 930, and S4 generations)
• Fendt Farmer 100 series
• Fendt Farmer 200 series
• Fendt Farmer 300 series
• Fendt Favorit 600 series
• Fendt GT series

1. 1

   Turn the ignition off and back on to reset the system and see if the fault clears

2. 2

   Inspect the wiring harness and connector going to the S006 left brake switch for continuity, corrosion, or shorts

3. 3

   Check the physical magnet setting and gap for the S006 switch (on Vario models) to ensure it has not vibrated out of alignment

1. 1

   Power Down

   Turn off the tractor ignition and disconnect the battery to prevent electrical shorts.

2. 2

   Locate the Switch

   Locate the S006 left brake switch/sensor assembly at the base of the left brake pedal.

3. 3

   Disconnect

   Unplug the electrical wiring harness connector from the switch.

4. 4

   Remove the Faulty Switch

   For magnetic sensors (Vario models), unbolt the sensor bracket/housing. For mechanical switches (older models), unthread the switch from its mounting bracket.

5. 5

   Install the New Switch

   Mount the replacement switch. Crucial step for Vario models: You must adjust the 'Magnet setting for S005/S006 switch' to ensure the sensor properly detects the pedal's resting and depressed positions.

6. 6

   Reassemble and Test

   Reconnect the electrical harness, reconnect the battery, and cycle the ignition. Test the brake pedal to ensure the TMS system reactivates and the 05.1.54 code is cleared.