John Deere 521926.05 – RPM: Range C Solenoid Current Too Low

The control software has detected that the electrical current value reaching the Range C solenoid valve is below the acceptable operational threshold. This typically indicates an open circuit, high resistance in the wiring, or a failing solenoid coil.

• 6110R
• 6120R
• 6130R
• 6145R
• 6155R
• 6175R
• 6195R
• 6215R
• 6R series tractors
• 7R series tractors

1. 1

   Inspect the wiring harness between the RPM (Range Power Module) and the Range C solenoid valve for open circuits, chafing, or loose/corroded connector pins

2. 2

   Measure the resistance and current draw of the Range C solenoid valve to determine if the coil has failed internally

3. 3

   Check the ventilation around the control unit and verify if the control software is up-to-date, as the RPM module can exhibit shifting faults if it overheats

1. 1

   Allow Cooling Time

   Turn off the equipment and allow the control unit to cool down, as excessive heat can sometimes cause erratic current readings or module shutdowns.

2. 2

   Harness Repair

   If the diagnostic checks reveal a broken wire or corroded connector leading to the Range C solenoid, repair or replace the affected wiring harness section.

3. 3

   Replace the Solenoid

   If the wiring is intact but the Range C solenoid coil tests out of specification (causing the low current draw), remove and replace the Range C solenoid valve.

4. 4

   Update Software

   Install the latest software updates from John Deere for the RPM to improve performance and heat management.

5. 5

   Clear Codes and Test

   Clear the fault codes using a diagnostic tool and perform a test drive, shifting through all ranges to ensure Range C engages properly without throwing the code. If the error persists, the RPM module itself may require replacement or further diagnosis by a certified technician.