John Deere 523806.05 – BCU: Y75 Solenoid for PTO Speed 3 On, No Current Present at Power Module PC5

The system detects a current of less than 500 mA at the output to the Y75 solenoid (lead 7115) while the PTO Speed 3 is switched on. This low amp draw indicates an open circuit within the electrical system powering the solenoid, which prevents the Y75 solenoid from operating and disables the PTO Speed 3 function.

• 6110R
• 6120R
• 6130R
• 6145R
• 6155R
• 6175R
• 6195R
• 6215R
• 6110M
• 6120M
• 6130M
• 6140M
• 6145M
• 6155M
• 6230
• 6330
• 6430
• 7130
• 7230
• 7430
• 7530

1. 1

   Visually examine the wiring and connectors for lead 7115 (the circuit powering the Y75 solenoid) for any signs of breakage, disconnection, corrosion, or wear.

2. 2

   Use a digital multimeter to check for electrical continuity in the circuit associated with the Y75 solenoid to confirm the open circuit.

3. 3

   Inspect the Y75 solenoid itself for physical damage or internal failure that would prevent it from drawing the appropriate current (less than 500 mA).

1. 1

2. 2

   Repair wiring

   If the continuity test reveals breaks or damage within the circuit (lead 7115), repair or replace the affected wiring and connectors to restore proper electrical connectivity.

3. 3

   Replace the solenoid

   If the wiring is intact but the Y75 solenoid is found to be defective or internally shorted/open, remove and replace the PTO solenoid valve.

4. 4

   Reset the modules

   After making the necessary repairs, reset the Power Module PC5 and the BCU to clear the stored 523806.05 fault code and reinitialize the system.

5. 5

   Test functionality

   Conduct a test run of the PTO system to ensure that the Y75 solenoid for PTO Speed 3 is operating correctly, drawing adequate current, and engaging the PTO without throwing further codes.