John Deere 000736.05 – PTI/PTP: Reverse Brake Solenoid Circuit Fault / Clutch C3 Solenoid Circuit Fault

The transmission control module has detected low current or an open circuit in a transmission solenoid circuit. Depending on the transmission type, this affects either the Reverse Brake Solenoid (on IVT models, logged by the PTI) or the Clutch C3 Solenoid (on PowerShift models, logged by the PTP). This fault typically indicates a disconnected connector, a damaged wiring harness, or a failed solenoid coil.

• 8130
• 8230
• 8330
• 8430
• 8530
• 8235R
• 8245R
• 8260R
• 8285R
• 8310R
• 8335R
• 8360R
• 8400R
• 8310RT
• 8335RT
• 8360RT

1. 1

   Visually inspect the wiring harness and connectors leading to the identified solenoid (either Reverse Brake or Clutch C3) for any visible damage, such as chafing, breaks, or corrosion. Ensure connectors are securely seated.

2. 2

   Perform the component-specific circuit test specified in the service manual (PTI—Reverse Brake Solenoid Circuit Test for IVT, or PTP—C Clutch (CC) Solenoid Circuit Test for PST).

3. 3

   Perform a solenoid resistance test by disconnecting the solenoid and measuring across its terminals with a multimeter. Compare the reading to the OEM specification (an infinite resistance reading indicates a failed open coil).

4. 4

   Check wiring harness continuity between the transmission controller (PTI/PTP) and the solenoid connector to identify any open circuits or breaks in the wires.

1. 1

   Safety First

   Park the tractor on a level surface, lower all implements, shut down the engine, and disconnect the battery ground strap.

2. 2

   Locate and Access the Solenoid

   Locate the solenoid on the transmission control valve block. Access may require draining some transmission oil and removing protective covers.

3. 3

   Perform Diagnostics

   Carry out the diagnostic checks to confirm whether the fault lies with the solenoid itself or the wiring.

4. 4

   Replace the Faulty Component

   If the solenoid is faulty, remove it from the valve block (be prepared for residual oil spillage). Install the new OEM-specified solenoid, ensuring any seals or O-rings are correctly fitted and lubricated with clean hydraulic oil, and torque to specification. If the wiring is faulty, repair or replace the damaged section of the harness.

5. 5

   Reassemble and Test

   Reconnect the wiring harness, reinstall any covers, and reconnect the battery. Top off the transmission oil if necessary. Start the tractor and operate the transmission to ensure the fault code does not return. A transmission calibration may be required after the repair.