Massey Ferguson T4105 – TRANS: Transmission High Pressure Sensor 2 Signal Voltage Issue DYNA VT(TRANS)

Signal error - 8.5 V supply error 2 related to the X9 - Transmission oil high pressure sensor 1. This means the sensor is experiencing a signal voltage issue, likely caused by a failure in the 8.5-volt reference supply circuit or a failure of the sensor itself.

• 7614
• 7615
• 7616
• 7618
• 7619
• 7620
• 7622
• 7624
• 7626
• Interim Tier 4 (2012-2015)
• 7714
• 7715
• 7715S
• 7716
• 7716S
• 7718
• 7718S
• 7719
• 7720
• 7720S
• 7722
• 7722S
• 7724
• 7724S
• 7726
• 7726S

1. 1

   Check the 8.5V reference voltage supply from the Transmission Control Unit to the X9 sensor

2. 2

   Inspect the wiring harness between the TRANS module and the X9 sensor for shorts to ground, opens, or damaged pins

3. 3

   Test the sensor signal voltage output to ensure it is within the expected operating range

1. 1

   Locate sensor

   Locate the X9 Transmission Oil High Pressure Sensor on the transmission hydraulic block.

2. 2

   Inspect connector

   Disconnect the sensor's electrical connector and inspect for corrosion or fluid intrusion.

3. 3

   Check reference voltage

   Turn the key to the ON position (engine off) and probe the connector to confirm the presence of the 8.5V reference voltage.

4. 4

   Repair wiring harness

   If the voltage is missing, trace and repair the wiring harness back to the Transmission Control Unit.

5. 5

   Relieve hydraulic pressure

   If the voltage and ground are good, the sensor itself has failed. Relieve all hydraulic pressure in the transmission system before proceeding.

6. 6

   Replace sensor

   Unthread the faulty X9 high-pressure sensor and install the replacement OEM sensor.

7. 7

   Test tractor

   Reconnect the wiring harness, clear the T4105 fault code from the TRANS module, and test the tractor under load to ensure the transmission operates correctly and the code does not return.