John Deere 524216.31 – PTF (Front Chassis Module / Front PTO Control Unit) or BCU (Basic Control Unit): Issue With Message On The CAN BUS From The Main Control Module Relating To The Front PTO Switch Signal

The control software detects an open circuit to the front PTO switch, or the Front PTO was left switched ON when the engine was started, causing a conflict in the CAN bus signal.

• 6110M
• 6120M
• 6130M
• 6145M
• 6155M
• 6175M
• 6195M
• 6110R
• 6120R
• 6130R
• 6145R
• 6155R
• 6175R
• 6195R
• 6215R
• 6110R through 6250R
• 5080R
• 5090R
• 5100R
• 6090MC
• 6100MC
• 6110MC
• 6090RC
• 6100RC
• 6110RC
• 7630
• 7730
• 7830
• 7930
• 7720
• 7820
• 7920
• 7715
• 7815
• 7810
• 7210J

1. 1

   Verify that the Front PTO switch is in the OFF position before starting the engine (operator error check)

2. 2

   Restart the engine to verify if the active diagnostic trouble code reappears and resets communication

3. 3

   With the engine running, cycle the front PTO switch OFF and then ON again to see if the module recognizes the state change

4. 4

   Check the fuse panel, specifically fuse F35, which is tied to PTF controller problems on some models

5. 5

   Inspect the wiring harness and the 3-pole compact plug connected to the front PTO switch in the cab for loose connections, corrosion, or an open circuit

1. 1

   Safe Shutdown

   Park the tractor on a level surface, turn off the engine, and remove the key.

2. 2

   Clear the Code

   Ensure the Front PTO switch is pushed to the OFF position. Restart the tractor. If the code clears and the PTO operates normally, no further repair is needed.

3. 3

   Access the Switch

   If the code remains active, disassemble the armrest or the right-hand console (depending on the model) by removing the securing bolts at the bottom to access the switch wiring.

4. 4

   Test the Circuit

   Use a multimeter to test for continuity across the switch terminals when toggled. If the switch shows an open circuit when engaged, it has failed internally.

5. 5

   Replace the Switch

   Disconnect the wiring harness from the faulty switch. Pop the old switch out of the console bezel and snap the new OEM switch into place.

6. 6

   Reassemble and Calibrate

   Reconnect the cable harness, reassemble the armrest/console, and start the tractor to verify the code has cleared and the Front PTO engages properly.