Massey Ferguson 08.2.22 – HITCH module: Rear Hitch Position Sensor Signal Voltage Issue (HITCH)

The control module is receiving an out-of-range, erratic, or missing voltage signal from the sensor responsible for monitoring the physical height/position of the rear 3-point hitch.

• 4707
• 4708
• 4709
• 4710
• T4 (2015-2021)
• 5608
• 5609
• 5610
• 5611
• 5612
• 5613
• 5710SL
• 5711SL
• 5712SL
• 5713SL
• 7614
• 7615
• 7616
• 7618
• 7619
• 7620
• 7622
• 7624
• 7626
• 7714
• 7715
• 7715S
• 7716
• 7716S
• 7718
• 7718S
• 7719
• 7720
• 7720S
• 7722
• 7722S
• 7724
• 7724S
• 7726
• 7726S

1. 1

   Inspect the rear hitch position sensor and its mechanical linkage to ensure the rod is not bent, disconnected, or excessively worn.

2. 2

   Disconnect the 3-pin sensor connector and check for dirt, moisture, or corroded pins.

3. 3

   Inspect the wiring harness routing for rub points, open circuits, or shorts to ground.

4. 4

   With the key ON, test the sensor connector for proper reference voltage (5V or 8.5V depending on model year) and a solid ground.

5. 5

   Back-probe the signal wire and manually move the hitch to perform a signal sweep test; check for smooth voltage scaling to rule out a failed potentiometer.

1. 1

   Preparation

   Lower the rear hitch fully to the ground to relieve hydraulic pressure and mechanical tension. Turn off the tractor and disconnect the battery.

2. 2

   Removal

   Locate the rear hitch position sensor on the rockshaft. Disconnect the 3-pin electrical connector.

3. 3

   Unlink

   Unbolt the small mechanical linkage rod connecting the sensor arm to the hitch mechanism.

4. 4

   Dismount

   Remove the mounting bolts securing the sensor body to the tractor chassis and remove the old sensor.

5. 5

   Installation

   Mount the new sensor and tighten the hardware. Reattach the mechanical linkage rod.

6. 6

   Reconnect

   Plug in the 3-pin electrical connector and reconnect the battery.

7. 7

   Calibration

   A new position sensor must be calibrated to the Hitch Control Unit so the module learns the new minimum and maximum voltage limits for the hitch's physical travel. Perform the rear hitch calibration procedure via the tractor's dashboard diagnostic menu or using a dealer diagnostic tool.