Hi folks,

Need to pick yr brains on this one;

I had my headlights upgraded to LEDs, but that meant removing the front bumper. That did something to the radar units &/or wiring.

I’ve had to replace one radar unit, which now works but there is still an intermittent ent fault in that the adaptive cruise will just randomly switch & display the error message, ‘xxxx not available, no sensor vision’.

Now, I’ve check to left hand unit & plug contacts, all good, the Right unit contacts should be as it’s been swapped, However, there’s zero slack in the cable run on the right, so I’m thinking that one of the wires or connections has been strained or partially broken.

So, has anyone here had to delve into that wiring loom at all? I’m wondering if there’s another connector behind the bumper, or any advice on how to check the continuity on those cores?

I haven’t dived in yet, we’re away for a week now then I need the car for the next week, so I’m hoping for some insight from you guys before I dive into it in August!

Cheers folks!

Hello Dave,

Did you do this conversion yourself, or did you get someone to do it for you?

Regards,

Gareth.

It was done by Audi retrofits in Slough.

So simply return it to them to correct. If you fiddle with it they can claim it’s your fault.

Regards,

Gareth.

It went back to him twice, he thought it was a defective radar unit. So I had that checked by a local specialist that I know & trust, he confirmed it, so new one sourced, Swapped, coded & seperate re-aligned. Still doesn’t play full time.

Audi retrofits only works Tues - Thurs most weeks & he’s 120 miles away from me, so a full day, early start & £50 return trip in fuel to get it to him!

I am cross to say the least! he professes to fit the Adaptive cruise as a retrofit but it seems his skill & knowledge doesn’t extend to fault finding!

But he’s messed this up completely. Went to him on a recommend too.

I’m pretty certain the issue is in the wiring loom close to the RH unit, I’m just after any insights into any other connector in the engine bay that side for the radar unit. It’s only 3 cores, so once I get the air filter etc out the way & can get at the entire loom, I can just break into it & do a continuity check on the loom to the pins in the radar unit connector.

I’m certain there’s a ‘stretch’ break in it somewhere close to the unit connector, where he disconnected it to remove the number, I just need to prove it then find it, replacing, repairing &/or extending those 3 cores is a simple job once I can get in there.