John Deere 524181.19 – PTA: Missing Info On The CAN BUS, Transmission Module IVT (PTA)

The TIA (Tractor-Implement Automation / Cab Control Unit) or UIC control software is unable to determine the desired value for acceleration when changing the direction of travel (DTOAPR), failing to provide the CAN BUS network with the relevant data needed by the transmission.

• 6110R
• 6120R
• 6130R
• 6145R
• 6155R
• 6175R
• 6195R
• 6215R
• 6230
• 6330
• 6430

1. 1

   Check for related codes using a diagnostic scan tool to see if other CAN BUS voltage or communication codes are present, indicating a physical network issue.

2. 2

   Inspect the CAN BUS network wiring harness and connectors between the Cab Control Unit (TIA/UIC) and the Transmission Module (PTA) for chafed wires, loose pins, or corrosion.

3. 3

   Check software versions on both the TIA/UIC and the PTA modules to verify if a software bug is causing the missing data logic error.

1. 1

   Connect Diagnostic Equipment

   Hook up the John Deere Service ADVISOR tool to the machine's diagnostic port.

2. 2

   Perform Wiring Repairs

   If physical damage or corrosion is found on the CAN BUS lines between the cab and the transmission, repair the wiring harness or replace the damaged connector pins.

3. 3

   Flash/Update Modules

   If the wiring is intact, check for available software updates for the UIC/TIA and PTA controllers. Re-flash the modules with the latest OEM software to correct logic errors regarding the DTOAPR (desired acceleration) value.

4. 4

   Clear and Test

   Clear the stored fault codes. Test drive the tractor, specifically focusing on changing the direction of travel (forward to reverse) to verify that the TIA software is now successfully calculating and broadcasting the acceleration data.

5. 5

   Module Replacement

   If the wiring is perfect, the software is up to date, and the code immediately returns and prevents transmission operation, the UIC/TIA Cab Control Unit or the PTA module itself may have an internal hardware failure and require replacement.