CD30 MP3 and security codes?

[RobW]

This was the one I was bidding on

What is this one?

Both links to ebay...

[Caterman]

what does the canbus do as it seems to be important for a lot of things about a car

Nicked the following explanation as it is easier:

You're welcome.

I don't know why this terminology gets used, but since everone else seems to use it, I will too.

Radios without CAN interface - "Half CAN"
Older Vectra C radios don't have a CAN interface. Instead, the display acts as a gateway between the radio and the rest of the car's CAN. So the way the steering wheel buttons work is something like this:

1. The steering wheel buttons are connected to the CIM (steering column module)
2. The CIM puts the messages from the steering wheel buttons on the low speed CAN bus.
3. The display module picks up these low speed CAN bus messages and translates them for the radio (I think the radio interface is called I2C, not sure).
4. The radio does whatever it has to do when it receives these messages (Change volume, whatever).

You'll also find that these older radios don't have to be "Tech 2'ed" when moved between cars, although you might need to enter a PIN code when the power has been disconnected.

Radios with CAN interface - "Full CAN"
More recent Vectra C radios do have a CAN interface. So the way the steering wheel buttons work is something like this:

1. The steering wheel buttons are connected to the CIM (steering column module)
2. The CIM puts the messages from the steering wheel buttons on the low speed CAN bus.
3. The display module picks up these low speed CAN bus messages and puts them on the mid-speed CAN bus.
4. The radio is connected to the mid speed CAN bus, and picks up the steering wheel messages and does whatever it has to do when it receives these messages (Change volume, whatever).

On these newer radios, they must be "Tech 2'ed" to the car as described earlier. You'll also find these radios don't require codes to be entered if the power is disconnected.

Just about everything in the Vectra C (both "old" and "new") uses CAN interfaces - I don't know why the omission of CAN on older radios justifies the term "Half CAN"... (Rant ended...)

[Gsi3.2]

This was the one I was bidding on

What is this one?

Both links to ebay...

2nd one looks like it came out of an astra ( shape on the front)..

1st one even sounds like he knows it needed tech2ing out and hasn;t had it done..

[s5zax]

The second is for a new corsa D!