John Deere 524235.06 – CCU (Chassis Control Unit): MFWD Solenoid Current High

This fault code indicates that the control module has detected an abnormally high current (high amp draw) in the Mechanical Front-Wheel Drive (MFWD) solenoid driver or circuit. This condition is typically caused by a short circuit in the wiring harness, an internal short within the solenoid coil itself, or an over-temperature condition. The fault is often detected while the MFWD is disengaged, meaning the solenoid is struggling to remain inactive or engage properly when commanded. As a result, the MFWD system functionality is degraded to prevent potential damage or unsafe operation.

• 6110M
• 6120M
• 6130M
• 6145M
• 6155M
• 6175M
• 6195M
• 6110R
• 6120R
• 6130R
• 6145R
• 6155R
• 6175R
• 6195R
• 6215R
• 8225R
• 8245R
• 8270R
• 8295R
• 8320R
• 8335R
• 8345R
• 8370R
• 8400R

1. 1

   Visually check the MFWD solenoid for any signs of physical damage, wear, or overheating.

2. 2

   Inspect the wiring harness connected to the solenoid for exposed wires, chafing, open circuits, or shorts to ground that could cause a high amp draw.

3. 3

   Use a multimeter to check for proper voltage and continuity in the MFWD solenoid circuit, ensuring there are no voltage drops or interruptions.

4. 4

   Verify that the solenoid is not experiencing over-temperature conditions caused by excessive load or insufficient cooling.

1. 1

   Resolve wiring issues

   If the multimeter tests or visual inspection reveal a short circuit in the wiring harness, repair or replace the damaged section of the wiring.

2. 2

   Replace the solenoid

   If the wiring is intact and the high current draw is isolated to an internal short within the MFWD solenoid itself, remove and replace the MFWD solenoid.

3. 3

   Reset and monitor

   After making the necessary repairs or replacing the solenoid, cycle the power/switches, reset the CCU, and monitor the MFWD system during operation to ensure the fault code does not return and the 4WD engages correctly.