Adaptive Cruise Control Retrofit

[mcs]

Yes,

The pre-facelift cars retrofit is even easier than the later ones. You only need the small lower grill with the radar cover.

In most countries ACC was available from day 1 of production but it was a hefty extra-cost option.

I am keen to see what happens with the wiring Delboy, that is the only thing I am worried about with this retrofit. Where do the CAN wires attach and how.

Mike

[mattylondon]

Originally Posted by mcs

I am keen to see what happens with the wiring Delboy, that is the only thing I am worried about with this retrofit. Where do the CAN wires attach and how.

Hi Mike,

Hope you have had time to study Del's excellent write up regarding the ACC retrofit. The CAN connections and wiring for the ACC is relatively simple because it is its own CAN, known as CAN-E or Extended CAN, with only two network nodes - the radar and the gateway.

It has its own network because the radar broadcasts a lot of data at the highest importance level.

If the ACC nodes were on another CAN network this would result in lower priority data being delayed as only one CAN payload can be on the BUS (which would nearly always be the ACC data) Therefore a dedicated CAN for ACC is the best solution.

To simplify the CAN-E network even further, from ISO11898-2, the resistors are terminated in the CAN Controllers within each node.

So in reality this means only a simple twisted pair is needed between the radar and the gateway.

[Turbo Tony]

Thanks very much for taking the trouble of writing this thread Del.

A couple of silly questions, please:

1) Did the S8 instrument pack for ACC have the red LEDs around the speedo?

2) What's the lowest speed the ACC will operate down to?

3) How has the system been working for you?

[Delboy]

Hi Tony the Acc cluster does have the led's, it works like the one in this video

The system becomes available at 20mph and can operate up to 120mph

It will stay engaged a bit below 20mph but not sure how far and for how long.

Its been working fine, since I last tweaked it but its not really a system for in the town, and makes for a better experience on open road.

[mannyo]

Need to work out how to tweak mine, it only picks up large vehicles and will sometimes trip off after a period of following behind a lorry in roadworks with an ACC BLOCKED! error.

[Delboy]

Now you have a screen shot of yours and it's clearly out of spec I would tweak the vertical adjustment screw say 1/4 turn clockwise and then do the basic settings, make a note of the adjustment and drive for a while to see what figure changed by the adjustment carried out.

Good luck mate

[IT]

Del,

Thanks for taking the time to write such a detailed post..... I remember the days when I had time for such fun things....

[andydls]

Originally Posted by Delboy

Its been working fine

Only in the winter time, this radar freezes and stops working. It's really a headache when your cruise control stops working.

[Conquistador]

Originally Posted by andydls

It's really a headache when your cruise control stops working.

First world problems

[mattylondon]

Originally Posted by andydls

Only in the winter time, this radar freezes and stops working. It's really a headache when your cruise control stops working.

There is a sensor heater, Z47, unfortunately I don't have a part number.

Edit; just checked the current flow and the heater was dropped from MY 2005.