John Deere 735.05 – PTR (Powertrain Reverser / Transmission Control Module): Main Control Module Has Noted An Issue With The Supply Voltage To The Reverse Clutch Solenoid.

The control unit registers an open circuit or low current at the signal input of the reverse solenoid valve (Y36). Because the current at the lead of the proportional solenoid valve is too low, insufficient current flows to the solenoid, which can cause the transmission to limit or disable reverse movement and affect overall transmission performance.

• 5065M
• 5075M
• 5085M
• 5095M
• 5095MH
• 5105M
• 5015ML
• 5425
• 5425HC
• 5425N
• 5625
• 5625HC
• 5725
• 5725N
• 5725HC
• 5080R
• 5090R
• 5100R
• 5080RN
• 5090RN
• 5100RN
• 6R
• 6M
• 7R
• 8R
• 9R

1. 1

   Visually inspect the wiring harness and connectors leading to the reverse solenoid valve (Y36) for any signs of chafing, damage, loose connections, or corrosion.

2. 2

   Use a multimeter to check for open circuits in the wiring harness leading from the PTR/EPC control unit to the solenoid valve.

3. 3

   Ensure that the electrical supply to the solenoid valve is within the correct voltage range. Check for any issues with the power source, fuses, or the control unit that could affect current flow.

4. 4

   Use a multimeter to test the reverse solenoid valve (Y36) coil resistance. If the coil reads as an open circuit or is out of OEM specification, the solenoid is defective and must be replaced.

1. 1

   Park the tractor on a level surface, engage the parking brake, and turn off the engine.

   Park the tractor on a level surface, engage the parking brake, and turn off the engine.

2. 2

   Locate the transmission control valve manifold on the transmission housing and identify the reverse clutch solenoid (Y36).

   Locate the transmission control valve manifold on the transmission housing and identify the reverse clutch solenoid (Y36).

3. 3

   Disconnect the electrical connector from the reverse solenoid. Inspect the pins for moisture, dirt, or corrosion. Clean with electrical contact cleaner if necessary.

   Disconnect the electrical connector from the reverse solenoid. Inspect the pins for moisture, dirt, or corrosion. Clean with electrical contact cleaner if necessary.

4. 4

   Measure the resistance across the solenoid coil terminals. If the coil is open or shorted, proceed to replace the solenoid.

   Measure the resistance across the solenoid coil terminals. If the coil is open or shorted, proceed to replace the solenoid.

5. 5

   If the coil tests good, trace the wiring harness back to the PTR module, checking for continuity and repairing any broken wires or damaged connectors.

   If the coil tests good, trace the wiring harness back to the PTR module, checking for continuity and repairing any broken wires or damaged connectors.

6. 6

   To replace the solenoid, thoroughly clean the area around the valve body to prevent dirt from entering the hydraulic system.

   To replace the solenoid, thoroughly clean the area around the valve body to prevent dirt from entering the hydraulic system.

7. 7

   Unbolt and remove the defective reverse solenoid valve/coil from the transmission manifold.

   Unbolt and remove the defective reverse solenoid valve/coil from the transmission manifold.

8. 8

   Install the new solenoid valve, ensuring the O-rings are properly seated, and tighten to OEM torque specifications.

   Install the new solenoid valve, ensuring the O-rings are properly seated, and tighten to OEM torque specifications.

9. 9

   Reconnect the electrical harness.

   Reconnect the electrical harness.

10. 10

    Clear the fault codes from the system, start the tractor, and test the reverse function to ensure proper operation and that the code does not return.

    Clear the fault codes from the system, start the tractor, and test the reverse function to ensure proper operation and that the code does not return.