John Deere 522358.31 – FCC (Front Console Computer / Dash Module): Incorrect CAN Bus Message, Information from PTA, PTD, or PTQ Control Software / Drive Lever Message Missing

There is a data transfer problem between the FCC control software and the transmission/powertrain control software (PTA, PTD, or PTQ). The system is failing to receive the CAN bus message regarding the position of the Left-Hand Reverser or Drive Lever, resulting in incomplete or missing directional commands.

• 6110M
• 6120M
• 6130M
• 6145M
• 6155M
• 6175M
• 6195M
• 6110R
• 6120R
• 6130R
• 6145R
• 6155R
• 6175R
• 6195R
• 6215R
• 6090MC
• 6100MC
• 6110MC
• 6090RC
• 6100RC
• 6110RC
• 8245R
• 8400R
• 9470RT
• 9520RT
• 9570RT

1. 1

   Check for Accompanying Codes: Look for related codes such as FCC 524022.31 (Reverse Drive Lever, Fault) or FCC 524264.02 (LHR Circuit Conflict), which confirm a hardware failure in the reverser lever.

2. 2

   Inspect the CAN Bus Wiring: Check the wiring harness and connectors between the Left-Hand Reverser Multi-Function Control Unit, the FCC (Dash Module), and the transmission controllers (PTA/PTD/PTQ) for physical damage, corrosion, or loose pins.

3. 3

   Verify Lever Position Sensors: Use a diagnostic tool (like John Deere Service ADVISOR) to monitor the live data of the Left-Hand Reverser. If the FCC software does not detect any position changes when the lever is moved, the lever's internal position sensors have likely failed.

1. 1

   Read fault codes

   Connect a diagnostic tool to read all active and stored fault codes in the FCC and transmission controllers.

2. 2

   Inspect and test CAN bus wiring

   Perform a visual and multimeter continuity check on the CAN bus wiring harness connecting the Left-Hand Reverser to the Dash Module. Repair any broken wires or clean corroded connector pins.

3. 3

   Diagnose Left-Hand Reverser Assembly

   If the wiring is intact and communication lines are healthy but the reverser message is still missing (or lever position is not detected), the Left-Hand Reverser Assembly itself has failed.

4. 4

   Access reverser switch assembly

   Disconnect the battery, remove the steering column trim/cowling to access the reverser switch assembly.

5. 5

   Remove faulty control unit

   Unplug the wiring harness from the faulty Left-Hand Reverser Control Unit and unbolt it from the column.

6. 6

   Install new control unit

   Install the new OEM Left-Hand Reverser Assembly and reconnect the harness.

7. 7

   Reassemble and clear codes

   Reassemble the steering column trim, reconnect the battery, and clear the fault codes.

8. 8

   Test tractor engagement

   Test the tractor's forward, neutral, and reverse engagement to ensure the CAN bus message is now successfully reaching the PTA/PTD/PTQ modules.