Massey Ferguson 04.03.44 – Transmission Control Module (TRANS): Issue With Signal From Transmission Mounted Engine Speed Sensor (TRANS)

The onboard diagnostic system has detected an irregularity, malfunction, or missing signal from the engine speed sensor that is mounted on the transmission.

• 7714
• 7715
• 7715S
• 7716
• 7716S
• 7718
• 7718S
• 7719
• 7720
• 7720S
• 7722
• 7722S
• 7724
• 7724S
• 7726
• 7726S
• Tier 4 (2015-2021)
• 7614
• 7615
• 7616
• 7618
• 7619
• 7620
• 7622
• 7624
• 7626

1. 1

   Connect Wintest diagnostic software and monitor the live status of the speed sensor on the gearbox tab to confirm if the signal is dropping out or dead

2. 2

   Disconnect the sensor and use a multimeter to verify the reference voltage at the harness connector (typically a 10V or 14V supply)

3. 3

   Perform a frequency test on active Hall Effect or inductive sensors by measuring the input frequency (Hz) across the signal pins with the engine running at approximately 1150 rpm

4. 4

   Inspect the diagnostic harness and connectors for continuity, corrosion, or damage

1. 1

   Locate the sensor

   Locate the engine speed sensor mounted on the transmission housing.

2. 2

   Clean the area

   Clean the area around the sensor to prevent debris from entering the transmission.

3. 3

   Disconnect the harness

   Disconnect the electrical harness from the sensor.

4. 4

   Remove mounting bolt(s)

   Remove the mounting bolt(s). Be prepared for seized bolts, which are common on these external sensors.

5. 5

   Drain transmission fluid

   Partially drain the transmission fluid if the sensor port is located below the fluid level.

6. 6

   Replace the sensor

   Remove the old sensor and install the new one.

7. 7

   Reconnect wiring and top off fluid

   Reconnect the wiring harness and top off any lost transmission fluid.

8. 8

   Clear the DTC

   Use a specialized diagnostic tool to clear the DTC (04.03.44) from the TRANS module.