John Deere 523813.04 – RPT (Rear Chassis Module) or BCU (Basic Control Unit): Rear PTO Speed 1 Solenoid High Amp Draw

The control module detects an abnormally high current draw (exceeding 30 amps in lead 7063) on the circuit for the Rear PTO Speed 1 Solenoid (Y73) when it is activated, typically indicating a short circuit to ground within the wiring harness or a shorted internal coil inside the solenoid.

• 6110R
• 6120R
• 6130R
• 6145R
• 6155R
• 6175R
• 6195R
• 6215R
• 6230R
• 6250R
• 6110M
• 6120M
• 6130M
• 6140M
• 6145M
• 6155M
• 6175M
• 6195M
• 6230
• 6330
• 6430
• 7130
• 7230
• 7430
• 7530
• 6100D
• 6105E
• 6110E
• 6120E

1. 1

   Inspect the wiring harness and connectors between the RPT/BCU module and the Y73 PTO Speed 1 Solenoid (specifically lead 7063) for chafing, melting, or exposed wires causing a short to ground.

2. 2

   Disconnect the Y73 solenoid and use a multimeter to measure the resistance across its coil to check for an internal short (near zero resistance indicates a short).

3. 3

   Use a diagnostic tool or ammeter to measure the current levels at the solenoid when PTO Speed 1 is commanded on to verify if the draw spikes above the 30-amp threshold.

4. 4

   Verify the condition of the power supply, related fuses, and the PC5 power module outputs to ensure no secondary power supply faults are present.

1. 1

   Repair Wiring

   If the diagnostic checks reveal damaged wiring or a melted connector on lead 7063, splice in a new connector or repair the harness to eliminate the short circuit.

2. 2

   Replace the Solenoid

   If the wiring is intact but the Y73 solenoid fails the resistance test (internal short), remove the faulty PTO Speed 1 Solenoid valve from the rear PTO valve block and install a new OEM replacement.

3. 3

   Software Update

   Ensure the PAP control software / RPT module is updated to the latest version, as some current regulation issues are addressed via software patches.

4. 4

   Clear and Verify

   Clear the 523813.04 fault code using a diagnostic tool. Engage the rear PTO to verify that the system operates normally and the current draw remains within the specified range.