Massey Ferguson 04.01.61 – Transmission Control Unit (TCU) / TRANS1 / Autotronic 5: Issue With Range 1 Solenoid Valve

The system has detected a circuit malfunction or operational mismatch regarding the Range 1 solenoid (L52). This can be triggered by an open circuit in the solenoid wiring, a short circuit to +12V or 0V (ground), or an inconsistency between the Range 1 switch and the Range 1 solenoid valve state.

• 7724S
• 5712SL
• 7722S
• 7722
• 5713SL
• 7720S
• 7716
• 7718
• T4
• 7715
• 5710SL
• 7726
• 7726S
• 5711SL
• 7718S
• 7719
• 7714
• 7716S
• 7720
• Tier 4 (2015-2021)
• 7715S
• 7724
• 5608
• 5609
• 5610
• 5611
• 5612
• 5613
• 7614
• 7615
• 7616
• 7618
• 7619
• 7620
• 7622
• 7624
• 7626

1. 1

   Visually inspect the L52 Range 1 solenoid valve on the transmission control valve block, checking the electrical connector and wiring harness for corrosion, backed-out pins, or physical damage.

2. 2

   Using a multimeter, check the wiring between the Autotronic 5 (TRANS1) controller and the L52 solenoid for an open circuit or a short to ground (0V) or power (+12V).

3. 3

   Measure the resistance of the L52 solenoid coil to determine if it has failed internally.

4. 4

   Verify that the Range 1 selector switch in the cab is functioning correctly and sending the proper signal to the controller to rule out a switch/valve state inconsistency.

1. 1

   Park and secure tractor

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

2. 2

   Locate solenoid valve

   Locate the transmission control valve block on the side of the gearbox housing. Identify the Range 1 solenoid valve (L52).

3. 3

   Disconnect wiring

   Disconnect the electrical wiring harness connector from the L52 solenoid.

4. 4

   Remove retaining screws

   Remove the retaining screws and flanges securing the solenoid valve to the valve block.

5. 5

   Remove faulty solenoid

   Carefully pull the faulty solenoid valve out of the housing.

6. 6

   Lubricate O-rings

   Lubricate the O-rings on the new solenoid valve with clean transmission fluid to prevent pinching.

7. 7

   Install new solenoid

   Insert the new solenoid valve into the block, reinstall the flanges, and tighten the retaining screws.

8. 8

   Reconnect wiring

   Reconnect the electrical harness connector.

9. 9

   Clear fault code

   Clear the stored 04.01.61 fault code from the TRANS1 module using the tractor's diagnostic display or a dealer service tool.

10. 10

    Test transmission

    Start the tractor and test the transmission by shifting into Range 1 to ensure smooth engagement and that the code does not return.