c5 radio sat nav issues.

billyg55 · Post by **billyg55** » 20 Jun 2016, 21:58

hello my name is billy and I have been browsing this site for a while. After reading some of the posts on here and seeing the wealth of knowledge and information, I thought I might see if anyone can help me with the c5 problems.
I bought this 2007 c5 vtx+ estate a little while ago as spares or repair. The problem I have is the radio or sat nav does not work, neither does the reversing sensors or air con. I have checked the appropriate fuses in the glove box identified by the handbook. I have also done a bsi reset as per the forum but that has not made any difference. There are two warning lamps on the dash. engine management and esp I think.
I have taken the radio out and I see that the two big connections are not plugged in to the radio. They have like blue "caps" in them ! All the other ones can be plugged in. I am wondering if they have had an after market radio fitted and just plonked this one back in.
Any help would be hugely appreciated. Thanks in advance. Fingers crossed. billy

Post by **vborovic** » 20 Jun 2016, 22:37

billyg55 wrote:They have like blue "caps" in them !

This?

billyg55 · Post by **billyg55** » 20 Jun 2016, 22:56

hi, yes the same. !

Post by **GiveMeABreak** » 20 Jun 2016, 23:02

It's quite possible they put an aftermarket unit and put the original Head Unit back in afterwards - your Head Unit is also the interface that can turn on and off some vehicle functions (i.e. rear wipe in reverse gear, guide me home lighting, etc.) as well as set the date, time and other audio funtions etc. Can you post or PM your VIN so we can see what audio unit was originally fitted. I suspect you will still need to get a Lexia on the vehicle to check what is happening in more detail, but a good start is getting the block connector put back on for sure.

billyg55 · Post by **billyg55** » 20 Jun 2016, 23:05

hi, will do that tomorrow evening. thank you.

billyg55 · Post by **billyg55** » 22 Jun 2016, 20:57

hi. I did pm GiveMeABreak with my vin number. but here it is for anyone who can help with this issue. VF7**************[VIN obfuscated, can be read by forum staff]. I ALSO FORGOT TO MENTION THAT THE CD CHANGER HAS BEEN REMOVED FROM UNDER THE DRIVERS SEAT !! THANKS.

Post by **vborovic** » 22 Jun 2016, 21:26

The VIN doesn't actually help us unless we can see what you currently have (or don't have) ... are you sure the car actually had the CD changer under the seat, they're actually a rare add-on equipment (the cables are there in most of the car trims, in case you want' to add it additionally)

Post by **GiveMeABreak** » 22 Jun 2016, 21:32

Sorry Billy - forgot to post back! Billy has the RT4 System with Clour Screen. - Should be this one - can you clarify?

Once you've got it all hooked back up, you'll need to get a Lexia hooked up to it to interrogate the Audio ECU. The Audio ECU (accessed via the Lexia) will have configuration parameters for:

Air Conditioning Option (Present / Absent)
CD Changer Option
Display of Ext Temp
Audio System Option (Absent / Present) - This informs the Multi Function Screen that an Audio system is present & needs this info to allow the display of the audio system data
Trip Computer Option
Control of the Multifunction screen by the steering wheel radio control and the type of connection to the Remote control

Etc.,

Then on top of that there are the customisation options you can configure (without the Lexia), such as rear wipe in reverse gear, boot locking option, Guide me home lighting, auto headlamps etc.,
Also, they often fitted the CD changer metal harness under the seat, but this didn't mean they always fitted the units - as depending on the exact one you have, some use a Hard Disk, so may never of been fitted.

billyg55 · Post by **billyg55** » 22 Jun 2016, 21:41

hi, thanks for speed reply. yes that's the same as mine. I assumed the cd had been removed. cable is there as you suggest. how much would I be looking at to get it on a lexia ??

Post by **GiveMeABreak** » 22 Jun 2016, 21:58

Have you had a squiz through the Forum members list who have Lexias that offer to help out? I think there's a map so you can see who's nearest to your location. If there is anyone, send them a Private Message and contact them directly. Otherwise the main dealers apply their hourly rate - circa £90 an hour!

Link below:
http://www.frenchcarforum.co.uk/forum/v ... 19&t=29178

billyg55 · Post by **billyg55** » 22 Jun 2016, 22:07

at £90 I think I will just sing to myself !!! I have just sent a pm to a lad in st Helens asking to have a look for me. btw what are the blue plugs on the radio terminal blocks for ? thanks

Post by **vborovic** » 22 Jun 2016, 22:08

The blue bolts prevent the connectors from falling out ... you can pull them out easily, but unless you write down the color coding beforehand, don't do it

billyg55 · Post by **billyg55** » 22 Jun 2016, 22:15

oh ok. leave them alone then ! thanks

billyg55 · Post by **billyg55** » 23 Jun 2016, 21:48

Hi, thanks for all the replies, but i am still wondering if it has power to it. Or how can i check. Or does it need a lexia check ?? Thanks

Post by **GiveMeABreak** » 23 Jun 2016, 22:04

Ok a little more detail might help us, we can't see what's happening remember!

Did you connect the plugs at the back of the unit back in?
Is there anything on the display (Multifunction screen)?
Is there any power or lights on the head unit?
Have you checked the fuse (in passenger glovebox fusebox IIRC)?
Is there anything at all on the Multifunction screen?
Obvious, but have you pressed in the top left hand round button to switch it on?
Failing all of this, yes a Lexia will be next to see what is or isn't happening

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