Massey Ferguson 04.00.22 – TRANS (Transmission Control Module): Issue With Signal Voltage From Foot Throttle Sensor (TRANS)

The electronic control unit is receiving an out-of-range voltage signal from the foot throttle pedal sensor (e.g., >4.5V or <0.5V). When this occurs, the system cannot accurately determine the operator's requested engine speed, often resulting in the machine defaulting to a limited operating mode or idle speed for safety.

• 7714
• 7715
• 7715S
• 7716
• 7716S
• 7718
• 7718S
• 7719
• 7720
• 7720S
• 7722
• 7722S
• 7724
• 7724S
• 7726
• 7726S
• Tier 4 (2015-2021)
• 5608
• 5609
• 5610
• 5611
• 5612
• 5613

1. 1

   Check the 5V reference supply from the Transmission module/ECU to the foot throttle sensor to ensure it is not too high or too low.

2. 2

   Inspect the wiring harness and connectors between the foot throttle sensor and the TRANS module for micro-cracks, chafing, degraded solder joints, and ensure pins are clean, tight, and free of corrosion.

3. 3

   Test the sensor output using a multimeter or diagnostic tool by monitoring the signal voltage while slowly depressing the foot pedal. The voltage should sweep smoothly without dropping out or spiking.

1. 1

   Power Down

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

2. 2

   Access the Sensor

   Locate the foot throttle sensor assembly at the base of the throttle pedal in the cab.

3. 3

   Disconnect and Remove

   Unplug the electrical connector from the sensor. Remove the mounting bolts securing the sensor/pedal assembly to the floorplate.

4. 4

   Install New Sensor

   Mount the replacement foot throttle sensor and tighten the hardware. Reconnect the electrical harness.

5. 5

   Recalibrate

   Reconnect the battery. Use a diagnostic service tool (such as the AGCO Electronic Diagnostic Tool / WinTest) to clear the stored 04.00.22 fault code and perform a throttle pedal calibration procedure so the module learns the new minimum and maximum voltage values.