Massey Ferguson 04.03.07 – Transmission Control Module (TRANS) / Autotronic 4: Transmission High Pressure Sensor 2 Signal Voltage Issue (TRANS)

The transmission control unit is receiving an abnormal electrical voltage signal (either too high, too low, or missing) from the transmission's high-pressure sensor 2.

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

1. 1

   Check transmission fluid levels and quality, as low, overfilled, or dirty fluid can cause erratic pressure readings

2. 2

   Inspect the wiring harness leading to the transmission high-pressure sensor for rub points, damage, corrosion, open circuits, or shorts to ground/power

3. 3

   Disconnect the sensor and check the connector pins for moisture, dirt, or bent pins

4. 4

   Using a multimeter, verify that the sensor is receiving the correct reference voltage from the TCM and check the return signal voltage

1. 1

   Locate

   Locate the transmission high-pressure sensor (8-bar pressure switch) threaded directly into the transmission housing.

2. 2

   Replace

   Remove the faulty sensor and install the replacement, ensuring standard electrical connections plug securely into the existing harness.

3. 3

   Prepare

   Ensure calibration prerequisites are met: Hand brake must be applied or ParkLock engaged, Power Control lever must be in the neutral position, and High/low speed range must be in neutral.

4. 4

   Calibrate

   Perform a mandatory Transmission Calibration procedure systematically via the tractor's interface.