Massey Ferguson 05.01.54 – TRANS1: Issue With Left Brake Pedal Switch Signal Dyna VT

The transmission control system detects an irregular or missing signal from the left brake pedal switch. As a safety and operational precaution, the system restricts transmission functionality, and the '100% differential lock' is the only function still available.

• 7714
• 7715
• 7715S
• 7716
• 7716S
• 7718
• 7718S
• 7719
• 7720
• 7720S
• 7722
• 7722S
• 7724
• 7724S
• 7726
• 7726S
• Tier 4 (2015-2021)
• 7614
• 7615
• 7616
• 7618
• 7619
• 7620
• 7622
• 7624
• 7626
• 7465
• 7475
• 7480
• 7485
• 7490
• 7495
• 5400 Series
• 6100 Series
• 6200 Series
• 6400 Series

1. 1

   Inspect the left brake pedal switch for physical damage, sticking, or debris preventing it from actuating properly.

2. 2

   Inspect the wiring harness leading to the left brake pedal switch for open circuits, shorts to ground, or corroded terminals.

3. 3

   Ensure the brake pedals do not have excessive free travel. If the pedal is spongy, bleed the air from the foot brake circuit to prevent erratic switch engagement.

4. 4

   Verify the signal voltage from the switch to the TRANS1 module to confirm if the switch is internally failed (open/shorted).

1. 1

   Disconnect battery

   Disconnect the tractor battery before beginning the repair.

2. 2

   Locate switch

   Locate the left brake pedal switch on the brake linkage or mounting bracket under the dash/cab floor.

3. 3

   Disconnect wiring

   Disconnect the wiring harness connector from the faulty switch.

4. 4

   Remove switch

   Remove the old switch from the bracket.

5. 5

   Clean and inspect

   Clean the mounting contact area and inspect the wiring terminals for corrosion.

6. 6

   Install and adjust switch

   Install the new OEM switch and adjust it for the correct activation distance so that it engages properly when the pedal is depressed.

7. 7

   Reconnect components

   Reconnect the wiring harness and the battery.

8. 8

   Test and clear code

   Press the brake pedal to confirm the brake lights respond correctly, and use a diagnostic tool to clear the 05.01.54 fault code from the TRANS1 module.