Massey Ferguson 00.X.40 – Dash: CAN BUS Message Issue (Dash)

Communication failure on the Controller Area Network (CAN) bus. The dashboard is either failing to transmit its status messages to the rest of the tractor's network or is not receiving expected messages from other modules (such as the Engine Control Module or Transmission Control Unit).

• 7714
• 7715
• 7715S
• 7716
• 7716S
• 7718
• 7718S
• 7719
• 7720
• 7720S
• 7722
• 7722S
• 7724
• 7724S
• 7726
• 7726S
• Tier 4 (2015-2021)
• 5710SL
• 5711SL
• 5712SL
• 5713SL
• 4700 Series
• 5600 Series
• 7600 Series
• 7700 Series

1. 1

   Verify the battery is fully charged and the alternator is outputting the correct voltage (low voltage is a primary cause of CAN bus dropouts)

2. 2

   Inspect the wiring harness leading to the dashboard for chafing, pinch points, rodent damage, open circuits, or shorts to ground on the CAN High and CAN Low wires

3. 3

   Check the main multi-pin connectors at the back of the instrument cluster for loose pins, backed-out terminals, moisture, or green corrosion

4. 4

   With the battery disconnected, measure the resistance across the CAN bus pins at the dash connector (a healthy CAN bus should read approximately 60 ohms)

5. 5

   Check the main power relays and fuses that supply the instrument cluster and CAN network

1. 1

   Disconnect Power

   Always disconnect the negative battery cable before working on the tractor's CAN bus or removing modules.

2. 2

   Access the Dash

   Remove the steering column shrouds and dashboard trim panels to access the rear of the instrument cluster.

3. 3

   Clean and Reseat

   Disconnect the main wiring harness from the cluster. Spray the connectors with electrical contact cleaner, allow them to dry, and apply a small amount of dielectric grease. Reconnect the harness securely.

4. 4

   Repair Wiring

   If any damaged wires were found during the diagnostic phase, splice and solder the wires, sealing them with heat-shrink tubing.

5. 5

   Test

   Reconnect the battery and turn the ignition to the ON position. If the code clears and the dash functions normally, the issue was a poor connection.

6. 6

   Replace the Cluster

   If the wiring is perfectly intact, the CAN bus resistance is correct, and the code persists, the internal CAN transceiver inside the instrument cluster has failed. The instrument cluster must be replaced.