Massey Ferguson T5155 – Transmission Controller: Issue With Signal Voltage From Right Brake Pedal Sensor

The controller detects that the signal voltage from the right-hand brake pedal sensor (X67) is outside of its normal operating range, short-circuited, or experiencing interrupted data transfer.

• 7622
• Interim Tier 4 (2012-2015)
• 7614
• 7615
• 7620
• 7616
• 7618
• 7619
• 7626
• 7624
• 8650
• 8660
• 8670
• 8680
• 8690
• 6600 Series
• 5600 Series
• 6400 Series
• 7400 Series

1. 1

   Locate the right-hand brake pedal sensor (X67) on the brake pedal linkage assembly inside the cab

2. 2

   Inspect the wiring harness and electrical connector going to the sensor for chafed wires, corrosion inside the pins, or loose connections

3. 3

   Use a multimeter to verify the reference voltage reaching the sensor and check the signal wire for a short circuit to ground or an open circuit

4. 4

   Ensure there are no broader CAN network interruptions (such as code T41A2) since this sensor communicates with the transmission module

1. 1

   Power Down

   Turn off the tractor ignition and disconnect the negative battery cable to prevent electrical shorts during the repair.

2. 2

   Access the Sensor

   Access the brake pedal assembly in the footwell of the cab. Locate the right brake pedal sensor (X67).

3. 3

   Disconnect

   Carefully unplug the electrical harness connector from the sensor.

4. 4

   Remove

   Unbolt or unclip the faulty sensor from its mounting bracket on the pedal assembly.

5. 5

   Install

   Mount the new OEM brake pedal sensor into the bracket. Ensure it is properly aligned with the pedal's travel path so it can accurately read the pedal position.

6. 6

   Reconnect

   Plug the electrical harness back into the new sensor, ensuring it clicks securely into place.

7. 7

   Test

   Reconnect the battery. Turn on the ignition and use a diagnostic tool to clear the T5155 fault code. Depress the right brake pedal several times to ensure the transmission responds correctly and the code does not return.