Massey Ferguson 06.01.B0 – TRANS1: Issue With Message On The CAN BUS From PTO Switch DYNA VT (TRANS1)

The transmission control module is failing to receive the expected communication signals (messages) over the CAN (Controller Area Network) bus from the Power Take-Off (PTO) engagement switch.

• 7714
• 7715
• 7715S
• 7716
• 7716S
• 7718
• 7718S
• 7719
• 7720
• 7720S
• 7722
• 7722S
• 7724
• 7724S
• 7726
• 7726S
• Tier 4 (2015-2021)

1. 1

   Check battery voltage; low voltage (below 11.5V) or a failing alternator can cause erratic CAN bus communication errors.

2. 2

   Inspect main power fuses and specific fuses related to the transmission controller (TRANS1) and cab controls/armrest.

3. 3

   Inspect the wiring harness and connectors running from the PTO switch to the TRANS1 module for physical damage, chafing, or corrosion.

4. 4

   Test the PTO switch for power and ground, and verify CAN High and CAN Low signals at the switch connector.

1. 1

   Disconnect Power

   Disconnect the negative battery terminal before working on the tractor's electrical or CAN bus systems to prevent short circuits.

2. 2

   Access the Switch

   Carefully remove the trim panels on the armrest or side console to access the underside of the PTO switch.

3. 3

   Disconnect and Inspect

   Unplug the electrical connector from the PTO switch. Clean the contacts with electrical contact cleaner if any corrosion is present.

4. 4

   Repair Wiring

   If the wiring harness is damaged (e.g., from mice or chafing), splice and repair the damaged CAN bus wires, ensuring proper shielding is maintained.

5. 5

   Replace the Switch

   If the wiring is intact but the switch failed the diagnostic test, install a new OEM PTO switch.

6. 6

   Reassemble and Clear Codes

   Reconnect the switch, reassemble the console panels, and reconnect the battery. Use a specialized Massey Ferguson diagnostic tool to clear the 06.01.B0 DTC from the TRANS1 module. Test the PTO engagement to ensure the code does not return.