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[Entwood]

Thanks to andyc I now have the correct reversing sensors fitted .. and all 4 "vibrate" / tick when touched lightly.... but the system still just goes to a continuous tone a couple of seconds after selecting reverse..

I've checked the harness visually.. no sign of damage ... so the next bit I guess is the control box ...

Bosch 0 263 004 011

T'internet search reveals little, all pages found are old .. but looks like it might be a tad expensive to replace without confirming it's faulty

I'll stick a "wanted" in the relevant place .. but anyone know anything about these sysetms ?? There must be a some way of diagnosing them other than "buy and replace" surely ..

[feeutfo]

Thats annoying, just to be clear they all tick and give constant tone?

[Entwood]

Thats annoying, just to be clear they all tick and give constant tone?

Yup....  all tick/vibrate when lightly touched, on selecting reverse the light "beep" it always did to tell you its working, followed by a constant tone about 3 seconds later.

[feeutfo]

Hmmm, could do with swapping units first, Newent perhaps?

[Dany]

I think it's the URF-4 or 5 installed on the Omega and it's not available by Bosch anymore... I had the same problem and impossible to find this model! Bosch proposes to me the new one, URF-7, but the sensors are smaller so I have a problem with the holes drilled on the bumper... No way to find another bumper without holes, it's an Irmscher one!! 

But if I find a way to "re-make" the holes properly, I will buy the Meta-system sensors. They looks very nice, with "an internal fitting", like the new BMW's parkpilot. 

[Sixstring]

Sounds stupid, as they all "tick", but unplug the two middle sensors and try again. If that doesn't change the situation, unplug the two outside ones, replacing the two other plugs first!!

This wil do two things.....firstly it will make sure the two ultrasonic sensors are not cross inducing themselves, (meaning faulty) and that the control box is not faulty on one channel only, because the bosch unit is a two channel device, and if one channel is u/s, it will show a "close up" signal, and it will also tell you which channel is ok, giving you some useability. (albeit on set of sensors, and you can then obtain another unit safe in the knowledge it is kaput.)

Unfortunately, to my knowledge the only people that repair them is Bosch UK in slough, but the cost is bound to be prohibitive, and if you can get a s/h one once you are sure it is buggered.............

Hope this helps you, mate.

[Entwood]

Hmmm, could do with swapping units first, Newent perhaps?

That was my idea as well .. if anyone there has the system and is willing to try ..

Sounds stupid, as they all "tick", but unplug the two middle sensors and try again. If that doesn't change the situation, unplug the two outside ones, replacing the two other plugs first!!

This wil do two things.....firstly it will make sure the two ultrasonic sensors are not cross inducing themselves, (meaning faulty) and that the control box is not faulty on one channel only, because the bosch unit is a two channel device, and if one channel is u/s, it will show a "close up" signal, and it will also tell you which channel is ok, giving you some useability. (albeit on set of sensors, and you can then obtain another unit safe in the knowledge it is kaput.)

Unfortunately, to my knowledge the only people that repair them is Bosch UK in slough, but the cost is bound to be prohibitive, and if you can get a s/h one once you are sure it is buggered.............

Hope this helps you, mate.

mmm conflicting advice...  

In another thread I was told that any sensor being faulty/unplugged would give the tone, there is no "split system"  all four sensors must be connected..... however I might well take the bumper off again and try various combinations to see if your idea works ... nowt to lose really ..

Thanks for the ideas .. keep em coming !! 

[henryd]

I don't know if this helps but my mig has a two sensor set up on the rear bumper(not oem I think) and it works fine until I clip on the detachable hitch then it goes constant tone

[Sixstring]

My system URF-5b, dunno about the newer ones.
Works like that on mine. Found another control box on a scrap vectra for £30, so are available.

Mike.

[Entwood]

My system URF-5b, dunno about the newer ones.
Works like that on mine. Found another control box on a scrap vectra for £30, so are available.

Mike.

Well.. if you happen to be near a scrappies and find a control box 0 263 004 011 ... at a sensible price, I'd be happy to pay for it and your time !! No decent scrappies around here.

[Kevin Wood]

According to the wiring diagram, the park pilot sensors have two common wires, and an individual wire from each sensor back to the ECU.

Guessing the "transmit" side of the sensor is commoned, and a separate receive for each sensor.

Kevin

[feeutfo]

Hmmm, could do with swapping units first, Newent perhaps?

That was my idea as well .. if anyone there has the system and is willing to try ..

Sounds stupid, as they all "tick", but unplug the two middle sensors and try again. If that doesn't change the situation, unplug the two outside ones, replacing the two other plugs first!!

This wil do two things.....firstly it will make sure the two ultrasonic sensors are not cross inducing themselves, (meaning faulty) and that the control box is not faulty on one channel only, because the bosch unit is a two channel device, and if one channel is u/s, it will show a "close up" signal, and it will also tell you which channel is ok, giving you some useability. (albeit on set of sensors, and you can then obtain another unit safe in the knowledge it is kaput.)

Unfortunately, to my knowledge the only people that repair them is Bosch UK in slough, but the cost is bound to be prohibitive, and if you can get a s/h one once you are sure it is buggered.............

Hope this helps you, mate.

mmm conflicting advice...  

In another thread I was told that any sensor being faulty/unplugged would give the tone, there is no "split system"  all four sensors must be connected..... however I might well take the bumper off again and try various combinations to see if your idea works ... nowt to lose really ..

Thanks for the ideas .. keep em coming !! 

Assumed we had the same system tbh. Have you since discovered yours is non standard system, or some oddity? Different sensors as I recall?

[Entwood]

Factory fitted by VX, along with the Irmscher kit. Makes it a "Special Order Vehicle" ..

According to the EPC (and andyc) the only differences are the actual sensors, and the loom for the sensors. My sensors are 3 wire, the "other" ones appear to be 4 wire... well the thing has 4 pins and a different fitting !!...

The control box is common to both.

Off to remove the bumper and try different combinations of pairs ..

[feeutfo]

Well it may well be worth a try, swapped two on one side around on mine and away it went, but the inside one was def not ticking so presumed a bad conection?

Anyway, good luck with it.

[Entwood]

Right .. been playing ..  getting quite good at getting the rear bumper off and on now !!

Doesn't matter what sequence or combination of sensors fitted, the continuous tone does not vary, single, pairs whatever, even tried only old, only new, all variations .. no difference...

What I did find was a purple blade fuse.. that isn't a fuse .. its a 430 Ohm resistor .. If I remove THAT and try the system .. the tones are different. I don't get the light "self test" tone at all .. I then get

1 long, 2 short, 3 short tones .. that keep repeating. It matters not what combination of sensors are fitted, its always the same.

If, big if, removing that resistor puts the system into some sort of "test" mode ... it looks like the control box "thinks" I have a problem with the either the inboard pair (2,3) or it does not "see" the outboard pair (1,4) even though they all vibrate/tick.

I guess unless some kind soul finds a control box, cheap, its wait until Newent and try and bribe someone into a control box swap as a test ..

System back together now, with one exception ... speaker is unplugged !!!!