CD70 Navi help

[sri150]

I have previously posted a problem with the screen in that all of a sudden it went blank one day and hasnt worked since. Checked all the leads plugged in ok and checked that there is still power going to the screen (so it seems), and checked all fuses but still no luck as to why it isnt working. The actual head unit is working fine, as is the sat nav but no screen means its all guess work!

Took it into a local car audio place and one of their specialists says these screens are usually ok (Siemens VDO - £1200 dealer replacement!!!). they think it may be the supply/power from the actual head unit itself that may have failed. Before I give it to these guys to look at (£55 min. cost so not too bad if they fix it) I was wondering if anyone on here could advise if they know of any other potential fixes.

My sister has an astra with the CD 70 unit so I was debating trying her screen in my car or vice versa to check if it is the screen thats at fault (believe that the screen would only flash tho as not coded to my unit, but presumably would still power up as such?).

[Robsey]

The screen will work, but it will bong every five seconds (if there is a fault - not matched). Although for reasons that I will not post on a public facing forum, it is likely that it will work fine.

I have wired up a CD70 into a Cavalier 3, and you could just link up the two red wires in the GID / CID, or the two reds in the head-unit.

According to TIS these are linked anyway...albeit not directly.

[sri150]

thanks for that Robsey - I will give that a go first rather than pay someone else to tell me the the same thing! now to persuade my sister to let me dismantle her dash!

[Robsey]

Just checked my other thread, there is only one red and one brown on the head unit.....the only other reds will be for telephone or CID data links...don't bridge onto these.

The Display unit however does have two reds (+12 v) and two browns (ground).

If necessary you can link the reds at pin 3 and 5, or you could link the grounds (browns on pins 1 and 2 of your display).
Again as said before, if you have a link for telephone, DAB, rear head-unit as found in Meriva etc or CID, it is possible to find multiple reds and browns...don't link any other wires as it may damage the unit.

Here is the pin out for the main plugs of the Displays and CD70 Head-unit.
The Colour Info display has a separate lead for RGB signals (don't touch this if you have one).
GID SCREEN – Full CAN for 2004 onward screens.

Pin No Colour Function Goes to:-

1 Brown Ground Ground / Chassis / Earth ***********
2 Brown Ground Linked to pin 1 *********
3 Red +12 Volt Linked to pin 5 **********
4 --------- Not Used
5 Red + 12 Volt To supply fuse FI17 (At side of Dash) *********
6 --------- Not Used
7 --------- Not Used
8 Blue Data Line to radio pin 39
9 Yellow Data Line to radio pin 33
10 upto 16 - Not Used
17 Green Mid Speed CAN Hi BCM Climate Control / DAB
18 White Mid Speed CAN Lo BCM Climate Control / DAB
19 White Mid Speed CAN Lo to radio pin 10
20 Green Mid Speed CAN Hi to radio pin 9
21 --------- Not Used
22 Green Mid Speed CAN Hi to diagnostic link (BCM)
23 White Mid Speed CAN Lo to diagnostic link (BCM)
24 not coloured Data Line Ground to radio pin 12
25 Green Lo-Speed CAN Hi ????
26 & 27 ------ Not Used
28 Green Lo Speed CAN Hi
29 onward…not used

Radio Connections for 2004 Onward…CD30, CDC40, CD70

Radio Pin No Colour Function Goes to: -

1 white speaker wire speaker loom
2 yellow speaker wire speaker loom
3 blue speaker wire speaker loom
4 green speaker wire speaker loom
5 brown/white speaker wire speaker loom
6 brown/yellow speaker wire speaker loom
7 brown/blue speaker wire speaker loom
8 brown/green speaker wire speaker loom
9 GREEN HI SP’D CAN GID pin 22 (should be 20)
10 WHITE HI SP’D CAN GID pin 23 (should be 19)
11 Black Telephone
12 Brown ground Chassis ground and GID pin 24 **********
13 red/white data link twin audio / travel assistant
14 white speaker wire speaker loom - mid dash for telephone
15 RED +12V Instrument Fuse (FI1) ****************
16 yellow speaker wire speaker loom - mid dash for telephone
17 blue/red data link Twin Audio/ Travel Assistant
19 sheath data link Twin Audio / Travel Assistant
20 Grey data link Twin Audio / Travel Assistant
23 green/white data link Twin Audio / Travel Assistant
29 sheath Telephone Microphone
30 orange/grey Data link Air Bag and Telephone
31 green/brown data link DAB unit
32 Blue/red data link DAB unit
33 YELLOW GID LINK GID pin 9
34 Blue Telephone
35 Blue/red Telephone Microphone
37 BLUE/RED Speed sensor ABS pick-up
38 Sheath Data link DAB unit
39 BLUE GID LINK GID pin 8
40 Brown Telephhone

DO NOT LINK BROWN TO REDS...you will blow your fuses.