No Signal on Head Unit

[planet]

Hi All,
Looking for any advice regarding the No Signal message on the head unit.

Looking at other posts, many seem to be intermittent and disappear after some time, however, this is not the case for me. Others have mentioned units being replaced under warranty, however, mine is now out of warranty.

Bimmercode indicates there is no response from the head unit.

I have checked the 2 fuses related to the head unit and they are ok.

The head unit warms up to touch, so it would seem it is getting power.

Holding down the power button (also the power and eject buttons) to initiate a reset does nothing.

I've disconnected the battery for an extended time to perhaps trigger a reset.

The front panel and navigation buttons all light up as expected with headlights, and ventilation functions as normal.

I can find a replacement head unit, however, I believe it needs to be programmed to the car by the dealer, and i would like to be more certain of the issue before spending money if the issue could be related to something else I have not thought of as yet.

[TheNine90]

Have you tried other apps to see if the HU responds? If it still responds you can try flashing the unit and see if it helps.

[planet]

Originally Posted by TheNine90

Have you tried other apps to see if the HU responds? If it still responds you can try flashing the unit and see if it helps.

I have bimmercode however the HU module doesn't appear in the list.

[TheNine90]

Do you have enet cable? If you have you can use esys to check or I can help you check the issue remotely.

[planet]

Originally Posted by TheNine90

Do you have enet cable? If you have you can use esys to check or I can help you check the issue remotely.

I have ordered a new cable, and would be very interested if you could give me any pointers to check on. Appreciate your help.

[TheNine90]

Connect to the car. In coding tab under expert mode, Read SVT Actual using READ ECU button. Check if you NBT or NBTevo under the svt tree on the left.

[mrfochon]

Did you remove the HU before that happened ?
What happened prior to that error ?

[planet]

Originally Posted by TheNine90

Connect to the car. In coding tab under expert mode, Read SVT Actual using READ ECU button. Check if you NBT or NBTevo under the svt tree on the left.

ok finally got the cable to work. There was a C105 error reading VCM - not sure if that's anything to be concerned with. Read ECU was ok.

Here is a list of ecu's that it found . I don't see either in the SVT Tree., However from pulling the headunit out, i know its a NBT HU.

Any other ideas ?

[planet]

Originally Posted by mrfochon

Did you remove the HU before that happened ?
What happened prior to that error ?

The issue just happened by itself, we were not doing anything at the time and we hadn't removed HU before the issue. Have since pull it out to check connections etc.

[TheNine90]

You should use read ECU since this reads the current modules present.
If the HU doesn't appears then it means the HU isn't communication. First check power supply to the hu.

[planet]

Originally Posted by TheNine90

You should use read ECU since this reads the current modules present.
If the HU doesn't appears then it means the HU isn't communication. First check power supply to the hu.

Thank you for your assistance, There is power to the HU as i noticed it getting warm when the accessories is turned on. i can also hear the HD making noises from time to time.

Would any of the other tools help identify anything ?

[TheNine90]

You can get any tool to read. Or use esys and see if HU is communicating.