Massey Ferguson E171.19 – Dash: Issue With Signal From Outside Air Temperature Sensor

The controller is receiving an erratic, out-of-range, or missing electrical signal from the ambient air temperature sensor, which is used to monitor the outside climate conditions.

• 7616
• 5612
• 7622
• Interim Tier 4 (2012-2015)
• 7614
• 5611
• 7615
• 5610
• 5613
• 7620
• 5609
• 7618
• 5608
• 7619
• 7626
• 7624
• MF 5710 SL
• MF 5711 SL
• MF 5712 SL
• MF 5713 SL

1. 1

   Visually inspect the outside air temperature sensor (typically mounted near the front grille or intake) and its 2-pin oval connector for corrosion, dirt, or moisture.

2. 2

   Inspect the wiring harness running from the sensor to the Dash module for chafing, breaks, or short circuits.

3. 3

   Test the sensor resistance using a multimeter. A healthy sensor reads around 5000 Ohms at room temperature. An open circuit (infinite resistance) or a dead short indicates a failed sensor.

4. 4

   Verify that the Dash module is sending the correct reference voltage (usually 5V) to the sensor connector when the ignition is ON.

1. 1

   Power Down

   Turn off the tractor ignition and disconnect the negative battery terminal to prevent electrical shorts.

2. 2

   Locate the Sensor

   Find the ambient air temperature sensor at the front of the tractor.

3. 3

   Disconnect

   Press the release tab on the 2-pin oval electrical connector and pull it free from the sensor.

4. 4

   Remove the Sensor

   Carefully unclip or pull the faulty sensor out of its mounting bracket.

5. 5

   Install the New Part

   Push the new sensor into the mounting bracket until it is secure.

6. 6

   Reconnect

   Plug the electrical connector back into the sensor, ensuring it clicks firmly into place.

7. 7

   Test

   Reconnect the battery, turn the ignition ON, and verify that the outside temperature displays correctly on the dash and that fault code E171.19 has cleared.