John Deere 524167.19 – CSC or TCU: Incorrect CAN Bus Message, Transmission

Triggered when there is a discrepancy between the actual and commanded transmission speeds, or when the User Interface Controller (UIC) / Transmission Module (PTA) is unable to determine the desired transmission ratio (DTRR), resulting in a missing or incorrect message fault on the CAN BUS.

• 6110R
• 6120R
• 6130R
• 6145R
• 6155R
• 6175R
• 6195R
• 6215R
• 8225R
• 8245R
• 8270R
• 8295R
• 8320R
• 8335R
• 8345R
• 8370R
• 8400R
• 6230
• 6330
• 6430

1. 1

   Check for related active PTI, PTP, or PTQ (Transmission) codes first, as they usually point to the root hardware issue

2. 2

   Verify the integrity of the CAN bus lines between the PTA/UIC and the TCU/CSC

3. 3

   Examine the wiring harnesses connected to the transmission control units and sensors (such as the clutch potentiometer and speed sensors) for signs of damage, chafing, disconnection, or wear

4. 4

   Use a diagnostic tool (like Service ADVISOR) to read live values of the transmission input/output speed sensors and clutch potentiometers to ensure they are transmitting correctly

1. 1

   Disconnect Power

   Turn off the machine and disconnect the battery before servicing electrical components.

2. 2

   Clean and Secure Connectors

   Disconnect the harnesses at the PTA/UIC and TCU modules. Inspect the pins for corrosion, moisture, or pushed-back terminals. Clean with contact cleaner and apply dielectric grease before reconnecting securely.

3. 3

   Repair Wiring

   If the diagnostic tests reveal high resistance or an open circuit on the CAN bus lines, repair or replace the affected section of the transmission wiring harness.

4. 4

   Replace Defective Sensors/Modules

   If a specific sensor (e.g., clutch potentiometer) or the PTA/UIC module itself fails the diagnostic bench test, remove and replace the faulty component.

5. 5

   Software Update and Calibration

   Ensure the control software for the transmission modules is up-to-date. After replacing any transmission components or modules, perform the necessary transmission calibrations via the diagnostic tool to ensure accurate signal processing.

6. 6

   Functional Test

   Clear the fault codes, start the tractor, and conduct a comprehensive test drive to confirm that the desired transmission ratio is correctly transmitted and the code does not return.