Massey Ferguson T160 – TRANS1: Issue With Range 1 Engaged Switch And Range Solenoid 1

The transmission controller has detected an inconsistency between the state of the Range 1 engaged switch (L56 or X488) and the Range 1 solenoid valve (L52 or G25). The controller is commanding the solenoid to engage Range 1, but the switch is not confirming the engagement (or vice versa).

• 7616
• 5612
• 7622
• Interim Tier 4 (2012-2015)
• 7614
• 5611
• 7615
• 5610
• 5613
• 7620
• 5609
• 7618
• 5608
• 7619
• 7626
• 7624
• 5400 Series
• 5425
• 5455
• 5460
• 5600 Series
• 6400 Series
• 6445
• 6455
• 6460
• 7600 Series
• 7700 Series
• 7714
• 7715
• 7716
• 7718
• 7719
• 7720
• 7722
• 7724
• 7726

1. 1

   Inspect the wiring harness for the Range 1 solenoid valve (L52) and Range 1 switch (L56) for an open circuit or a short circuit to +12 V or 0 V.

2. 2

   Measure the resistance of the Range 1 solenoid valve. It should be 7.2 Ω ± 7% (measured between pins 9 and 20).

3. 3

   Verify the Range 1 switch is not shorted to 0 V, which can also trigger related switch codes.

1. 1

   Locate the Components

   The transmission solenoid valves are located to the front and right-hand side of the gearbox on the clutch unit.

2. 2

   Preparation

   Clean the area around the transmission control valves to prevent debris from entering the hydraulic system.

3. 3

   Removal

   Disconnect the electrical connectors for the Range 1 solenoid valve (L52) and the Range 1 switch (L56).

4. 4

   Dismounting

   Remove the retaining screws and flanges holding the solenoid valves in place.

5. 5

   Testing the Circuit (Optional)

   If diagnosing the mechanical shift rails internally, service manuals suggest fashioning a union to supply the control circuit with compressed air at a maximum pressure of 4 bar to manually actuate the ranges and verify mechanical movement.

6. 6

   Replacement

   Replace the faulty Range 1 solenoid valve or Range 1 switch with a new OEM part.

7. 7

   Reassembly

   Refit the solenoid valves along with their flanges and tighten the screws.

8. 8

   Finalization

   Reconnect the electrical connectors, clear the T160 fault code using a diagnostic tool, and perform a road test to ensure Range 1 engages correctly without inconsistency.