Massey Ferguson 04.X.29 – TRANS: Issue With Message From Speed Lever On Armrest (TRANS)

The transmission controller is either not receiving a signal, receiving an implausible message, or experiencing a CAN bus communication failure with the transmission speed lever (X106).

• 7714
• 7715
• 7715S
• 7716
• 7716S
• 7718
• 7718S
• 7719
• 7720
• 7720S
• 7722
• 7722S
• 7724
• 7724S
• 7726
• 7726S
• Tier 4 (2015-2021)
• 8670
• 8690
• MF 6700 S

1. 1

   Check for related fault codes (such as D 137, D 138, or D 158) that point to the exact electrical failure or calibration issue of the X106 lever

2. 2

   Inspect the wiring harness and connectors between the X106 armrest lever and the Transmission Controller for shorts to ground (0V), shorts to 12V, or open circuits

3. 3

   Check for Electromagnetic Interference (EMI) from high-power electrical devices (like two-way radios or cell phones) that can cause electronic interference on speed sensing circuits

4. 4

   Attempt to recalibrate the armrest lever via the tractor's Dash Control Center (DCC) to resolve potential loss of calibration parameters (Code D 158)

1. 1

   Power Down

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

2. 2

   Access the Armrest

   Disassemble the upper trim of the Command Control Armrest to expose the internal wiring of the Multipad joystick / transmission speed lever (X106).

3. 3

   Disconnect

   Unplug the electrical connector from the base of the speed lever.

4. 4

   Remove

   Unscrew the retaining bolts holding the speed lever assembly to the armrest frame and remove the faulty unit.

5. 5

   Install

   Mount the new AGCO speed lever/joystick and secure the retaining bolts.

6. 6

   Reconnect

   Plug in the electrical harness and reassemble the armrest trim.

7. 7

   Calibrate

   Reconnect the battery, turn on the ignition, and use the tractor's diagnostic interface to perform the mandatory calibration procedure for the new armrest lever.

8. 8

   Clear Codes

   Clear the 04.02.29 fault code from the TRANS module and test drive the tractor to verify proper powershift/range changes.