John Deere 000735.05 – PTQ: Reverse Clutch Solenoid Circuit Open

The system has detected a problem within the electrical circuit for the solenoid that controls the C2 clutch in the transmission. The FMI .05 signifies that the current in the circuit is below the normal operating range, which typically points to an open circuit, a high-resistance connection, or a faulty solenoid coil. This fault may affect the proper operation of the transmission system.

• 7220
• 7320
• 7420
• 7520
• 7720
• 7820
• 7920
• 6110M
• 6120M
• 6130M
• 6145M
• 6155M
• 6175M
• 6195M
• 310E
• 410D
• 4310

1. 1

   Inspect relevant fuses for the transmission control system to ensure power is not interrupted

2. 2

   Visually inspect the wiring harness leading to the transmission and reverse clutch solenoid for chafing, corrosion, pinch points, or loose connectors (especially under the right-side step)

3. 3

   Back-probe the connector at the reverse solenoid with a multimeter to verify it receives correct voltage when reverse gear is commanded (test under load)

4. 4

   Disconnect the solenoid and measure coil resistance (typically 5 to 30 ohms); infinite resistance indicates an open circuit within the coil

5. 5

   Briefly apply 12V power directly to the solenoid terminals to listen for a distinct 'click', indicating internal valve movement (do not apply power for more than a second)

1. 1

   Safety First

   Ensure the machine is on a level surface, the parking brake is engaged, and the engine is off. Disconnect the battery before working on electrical components.

2. 2

   Locate the Solenoid

   Identify the reverse clutch solenoid on the transmission control valve body. Its exact location can vary by model, so consulting a technical or service manual is recommended.

3. 3

   Perform Diagnostic Checks

   Follow the diagnostic steps outlined above to confirm whether the fault lies with the solenoid, wiring, or controller.

4. 4

   Address Wiring Issues

   If a wiring fault is found, repair or replace the damaged section of the harness. Ensure all connectors are clean, secure, and free of corrosion.

5. 5

   Replace the Solenoid

   If the solenoid is determined to be faulty, disconnect the electrical connector and remove the solenoid from the transmission valve body. Be prepared for some hydraulic fluid to leak. Install the new solenoid, ensuring any seals or O-rings are correctly seated.

6. 6

   Reconnect and Test

   Reconnect the electrical connector and the battery. Start the tractor and test the reverse function.

7. 7

   Clear Fault Codes

   After the repair, clear the diagnostic trouble codes from the control unit. Operate the machine to ensure the code does not reappear.