John Deere 523815.05 – RPT / BCU: Rear PTO Speed 3 Solenoid Low Amp Draw

When the operator engages the PTO, the control module sends power to the Y75 solenoid (lead 7115). This code triggers when the module measures a current of less than 500 mA. This low current draw indicates an open circuit, which is typically caused by disconnected wires, broken harness connections, high resistance in the circuit, or a completely failed (open) solenoid coil.

• 6110R
• 6120R
• 6130R
• 6145R
• 6155R
• 6175R
• 6195R
• 6215R
• 6230R
• 6250R
• 6110M
• 6195M
• 6230
• 6330
• 6430
• 6830P

1. 1

   Visually inspect the wiring harness and the connector at the Y75 Rear PTO Speed 3 solenoid for broken wires, pulled pins, corrosion, or debris.

2. 2

   Disconnect the solenoid and measure the voltage at the harness connector while the PTO is commanded ON (should be 12V). Lower voltage indicates high resistance or a wiring issue upstream.

3. 3

   Use a multimeter to test the continuity of the wiring circuit (lead 7115) between the RPT/BCU module and the solenoid connector to rule out a broken wire.

4. 4

   Measure the resistance (Ohms) across the pins of the Y75 solenoid itself. Infinite resistance (OL) or an abnormally high value indicates the internal coil has failed.

1. 1

   Turn off the tractor, remove the key, and disconnect the battery ground cable to prevent electrical shorts.

   Turn off the tractor, remove the key, and disconnect the battery ground cable to prevent electrical shorts.

2. 2

   Locate the Y75 Rear PTO Speed 3 solenoid valve on the rear chassis PTO valve block.

   Locate the Y75 Rear PTO Speed 3 solenoid valve on the rear chassis PTO valve block.

3. 3

   Thoroughly clean the area around the valve to prevent dirt from entering the hydraulic system.

   Thoroughly clean the area around the valve to prevent dirt from entering the hydraulic system.

4. 4

   Disconnect the electrical harness connector from the solenoid.

   Disconnect the electrical harness connector from the solenoid.

5. 5

   If diagnostics proved the wiring is faulty, repair the broken wire or splice in a new pigtail connector.

   If diagnostics proved the wiring is faulty, repair the broken wire or splice in a new pigtail connector.

6. 6

   If the solenoid coil failed, remove the retaining nut holding the coil to the valve stem and slide the old coil off (or unscrew the entire cartridge valve assembly if replacing the whole unit).

   If the solenoid coil failed, remove the retaining nut holding the coil to the valve stem and slide the old coil off (or unscrew the entire cartridge valve assembly if replacing the whole unit).

7. 7

   Install the new PTO solenoid valve/coil and tighten to OEM torque specifications.

   Install the new PTO solenoid valve/coil and tighten to OEM torque specifications.

8. 8

   Reconnect the electrical harness securely.

   Reconnect the electrical harness securely.

9. 9

   Reconnect the battery, start the tractor, and use the diagnostic monitor or John Deere Service ADVISOR to clear the stored 523815.05 fault code.

   Reconnect the battery, start the tractor, and use the diagnostic monitor or John Deere Service ADVISOR to clear the stored 523815.05 fault code.

10. 10

    Engage the PTO to verify proper operation and ensure the code does not return.

    Engage the PTO to verify proper operation and ensure the code does not return.