John Deere 523806.09 – RPT / BCU: Incorrect CAN BUS Message for Y75 Solenoid, PTO Speed 3

Communication failure or missing data on the CAN bus network between the Power Module PC5 (Transmission Power Module) and the main control unit, specifically related to the Y75 solenoid (PTO Speed 3).

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

1. 1

   Inspect CAN Bus Connections between the RPT/BCU and the PC5 power module for security, proper seating, corrosion, moisture, or damage.

2. 2

   Inspect the wiring harness connecting the PC5 module to the Y75 solenoid for any signs of chafing, open circuits, or shorts.

3. 3

   Verify the voltage and power supply to the PC5 module and the Y75 solenoid.

4. 4

   Ensure that the RPT/BCU and PC5 modules have the latest software updates installed.

1. 1

   Disconnect battery

   Disconnect the tractor's battery to ensure safety while working on the electrical system.

2. 2

   Locate modules

   Locate the PC5 Power Module (Transmission) and the RPT/BCU module.

3. 3

   Clean and inspect connectors

   Disconnect the CAN bus connectors at both modules. Clean the pins with electrical contact cleaner and inspect for bent, pushed-back, or corroded pins.

4. 4

   Perform continuity test

   Perform a continuity test on the CAN bus wiring between the RPT/BCU and the PC5 module. Repair or replace any damaged wiring harness sections.

5. 5

   Inspect Y75 Solenoid

   Locate the Y75 Solenoid (PTO Speed 3) on the transmission/PTO valve block. Inspect its connector and wiring for damage.

6. 6

   Reassemble and clear codes

   Reconnect all modules and the battery. Clear the fault codes using John Deere Service ADVISOR.

7. 7

   Test operation

   Test the PTO operation. If the code returns after wiring repairs, the PC5 module or the Y75 solenoid may have suffered an internal failure and will require replacement.