2006 QX56 Navigation question

[abmena]

Ok guys, Im really going crazy with this issue, I cant get my navigation system to work properly, I already changed the screen and the system keeps turning off or resetting every once an a while, some times it wont even turn on at all, also if I leave the radio on when I turn of the ignition, the next time I start the car, the radio is on and I cant control the volume because the screen doesn't turn on.
Any ideas on what could be wrong with the navigation unit?

 

[marctronixx]

first order of business is to check the obd port for any codes that may be present.

secondly, the BCM could be faulty and/or the instrument cluster. the CAN system in the car is serial in nature and all of the components talk to each other. if one component is faulty in the chain, it can cause issues downstream.

 

[Crystal2222]

Ok guys, Im really going crazy with this issue, I cant get my navigation system to work properly, I already changed the screen and the system keeps turning off or resetting every once an a while, some times it wont even turn on at all, also if I leave the radio on when I turn of the ignition, the next time I start the car, the radio is on and I cant control the volume because the screen doesn't turn on.
Any ideas on what could be wrong with the navigation unit?

Did you ever resolve this problem. What did it end up being and how did you fix it? Thank you

 

[marctronixx]

crystal, why dont you explain to the class what your specific issues are.

couple questions...

are you the first owner of this car??
did the nav at one point work properly?
would be helpful for you to go to an autozone or similar in your area and have them see if there are any fault codes at the obd port. this is a good place to start.