John Deere 524252.05 – CCU (Chassis Control Unit) / RPT (Rear PTO System): Rear PTO Solenoid Circuit Fault / Rear PTO Solenoid Valve, Current Too Low

Triggered when the control software detects a malfunction in the rear PTO solenoid driver or circuit (such as an open circuit, short circuit, or over-temperature condition) while the rear PTO is disengaged. The .05 extension specifically indicates that the current in the ground lead of the rear PTO solenoid valve is too low, pointing to an open circuit. Functionality of the rear PTO is significantly degraded or completely disabled to prevent unsafe operation.

• 5085E
• 5090E
• 5090EL
• 5100E
• 5045E
• 5055E
• 5065E
• 5075E
• 5065M
• 5075M
• 5085M
• 5100M
• 5100MH
• 5100ML
• 5115ML
• 5095M
• 5095MH
• 5105M
• 5015ML
• 5090M
• 5115M
• 6110M to 6195M
• 6110R to 6215R
• 7630
• 7720
• 7730
• 7820
• 7830
• 7920
• 7930
• 1025R

1. 1

   Visually inspect the rear PTO solenoid (often designated as component Y01 in wiring schematics) and its wiring harness for signs of physical damage, wear, or an open circuit.

2. 2

   Use a multimeter or diagnostic tool to measure the current at the ground lead of the solenoid circuit. Ensure it matches the commanded values from the CCU (e.g., 1100 mA when engaged or 0 mA when disengaged). Verify there are no voltage drops or interruptions.

3. 3

   Test the solenoid coil for proper resistance. If the coil is open (infinite resistance), the solenoid is faulty.

4. 4

   Ensure the solenoid is not experiencing over-temperature conditions due to excessive load or insufficient cooling.

5. 5

   On smaller models like the 1025R, specifically check the ICC-J1 connector for poor pin contact.

1. 1

   Repair Wiring

   If the diagnostic checks reveal damaged wires or connectors in the PTO solenoid harness, repair or replace the affected sections.

2. 2

   Replace the Solenoid

   If the wiring is intact but the Y01 Rear PTO Solenoid Valve fails the resistance/current test, relieve hydraulic system pressure, remove the faulty solenoid valve, and install a new one using new O-rings. Torque fittings to factory specifications.

3. 3

   Update Software

   Ensure that the CCU/RPT control software is updated to the latest version, applying any available patches that address current regulation issues.

4. 4

   Reset and Verify

   Restart the tractor engine. Sometimes the code can be corrected by resetting the communication messages upon restart. Verify that the active Service Code does not reappear and test the rear PTO for proper engagement.