Massey Ferguson AC11 – AIRCON (Air Conditioning) Control Module: Sunlight Sensor Signal Incorrect (AIRCON)

The air conditioning system's solar radiation sensor (X70) is sending a voltage signal to the controller that is outside the expected operating range (either too high, too low, or erratic).

• 7616
• 5612
• 7622
• Interim Tier 4 (2012-2015)
• 7614
• 5611
• 7615
• 5610
• 5613
• 7620
• 5609
• 7618
• 5608
• 7619
• 7626
• 7624
• Dyna-4 transmission models
• Dyna-6 transmission models
• 5400 Series
• 6400 Series
• 7600 Series
• 7700 Series
• 7714
• 7715
• 7716
• 7718
• 7719
• 7720
• 7722
• 7724
• 7726
• 8600 Series
• 8670
• 8690
• 4700 Series
• 5600 Series
• 5700SL Series

1. 1

   Perform a visual inspection of the X70 Solar Radiation Sensor to ensure nothing is covering it (e.g., dirt, debris, or items placed on the dash) that could block sunlight.

2. 2

   Disconnect the sensor and inspect the wiring harness connector for corrosion, moisture, or bent pins.

3. 3

   Using a multimeter, check the wiring between the X70 sensor and the AIRCON module for continuity. Test for a short to ground or a short to battery voltage.

4. 4

   If the wiring is intact, the sensor itself has likely failed internally and is sending an out-of-range resistance/voltage value to the module.

1. 1

   Power Down

   Turn off the tractor and disconnect the battery ground cable to prevent electrical spikes.

2. 2

   Access the Sensor

   Remove the trim panel or cover surrounding the sunlight sensor. On dashboard-mounted units, this may require removing mounting screws for the monitor assembly or lifting a plastic bezel.

3. 3

   Disconnect

   Unplug the wiring connector (often a small 2-pin or 3-pin pigtail) from the X70 sensor.

4. 4

   Remove

   Unclip or unscrew the faulty sensor from its mounting bracket.

5. 5

   Install

   Snap the new OEM solar radiation sensor into place and reconnect the wiring harness.

6. 6

   Reassemble

   Reinstall any trim panels or covers that were removed.

7. 7

   Clear Codes

   Reconnect the battery, turn the key to the ON position, and use a diagnostic tool (like an AGCO EDT or Jaltest) or the tractor's onboard diagnostic menu to clear the AC11 / 10.00.11 fault code. Test the automatic AC function in direct sunlight to ensure proper operation.