Controls on my steering wheel are no longer working

There is a bulletin to check for an unplugged ambient temperature sensor or open in the circuit. If all is good the ambient sensor is faulty.

#PIC6215A: AC Inoperative and/or Ambient Temperature Display Missing from the Radio - (Sep 14, 2018)

Subject:Â AC Inoperative and/or Ambient Temperature Display Missing from the Radio

Correction

Dealer to isolate and repair open circuit to the ambient temperature sensor.Â

Service Procedure:Â

Use GDS2 to check ambient temperature in the IPC data.

If it reads -40 there is an open to the ambient temperature sensor.

This leads to the radio not displaying a temperature and AC is also inoperative

Check for unplugged connectors or damaged harness to the ambient temperature sensor.Â

As for the steering wheel controls I would suspect a faulty clock spring.