Car Electronics Questions? Ask an Electronics Expert for Answers ASAP
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If you have had any after market components installed like an after market remote start or alarm system the control unit/ecu can short out internally in it and cause this here in some cases.If you do have any of these installed I would start with having it bypassed back to factory to see if these operate properly then.If they do then the fault is with the after market setup with it needing repaired or removed.
If you have no after market components at all this can be due to a fault with the radio/navigation control head itself in the dash.This can fail internally electronically and cause these issues here.
I would take it to an auto dealer with experience on this model or repair facility in your area that has experience on your model here for them to fully test and diagnose the fault for repair here.This would be the best place to have the radio/nav signals tested to see if for sure it is the cause as well as the repair that would need done.
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