Parking Sensors (front & Rear)

[NikpV]

look at item 17 in the faq - may give a little more info

[RTL]

Another Galaxy, same fault!

The park assist module in my bus has also been for a swim due to that dodgy washer water pipe joint.

Has anyone managed to source a unit cheaper than through Fraud?

Has anyone got one for sale?

Unit required YM21 15K866 AA.

[amjad karim]

I too have the same problem, when reverse is selected he light on the dash goes mental with a beeping for a bout 2 seconds. I will check the clicking tomorrow but could some one thell me when the front sensors come into play. Is it that they come on whenyou are driving forward very slowly or do you have to press the button to engage the front sensors.

 

I have nly had the car since yesterday and one of the reasons I bought it was due to parking sensors. Had reversing sensors on my old BMW and fell in love with them ( call me a lazy driver)

 

Thanks in advance

[gregers]

your a lazy driver :rolleyes:

 

on mine the front sensors work when in reverse and going forward.

[Davo]

I would like to commend this forum without which I would not have been able to fix my parking sensor problem. I am posting this to clarify something I did not pick up when reading the posts on parking sensors. I read that there was a tick when the parking sensors were switched on so I organised one of my children to sit in the car switching the parking sensors on and off. I now realise that the parking sensors tick constantly the whole time while they are switched on not just once the moment they are switched on as I had thought. I thought that by posting this I might save someone some money which I just wasted on child labour. My parking sensors have not worked since I got he car, but, knowing that the senors should tick, I was able to find the one which was not ticking. It was the nearside rear one. I swapped it with another one and found it was still the near side rear one not ticking. So I checked the wiring and after fiddling with it, one of the wires was so corroded it came away. I removed the bad bit, soldered it back together, and the parking system now works perfectly - no replacement parts required. I have read in these posts that it seems to be the nearside rear wiring which is prone to failing.

I do not have the VAG-COM thing but its sound like I should get one.

[niallsan]

I think I went overboard with power washing the front bumper on the gal and now when the parking aid is switched on I get two beeps from the rear buzzer followed by about 5 second blast from front buzzer. I checked the rear sensors and they all(4) are emmitting high frequency burst. Went to the front and as far as I can tell none of the transducers are emitting anything.

 

So, am I correct in saying, that if there is a fault with one of the tranducers in the front - non of the FRONT transducers will work????????

[niallsan]

I think I went overboard with power washing the front bumper on the gal and now when the parking aid is switched on I get two beeps from the rear buzzer followed by about 5 second blast from front buzzer. I checked the rear sensors and they all(4) are emmitting high frequency burst. Went to the front and as far as I can tell none of the transducers are emitting anything.

 

So, am I correct in saying, that if there is a fault with one of the tranducers in the front - non of the FRONT transducers will work????????

 

 

Just an update on the fix for above:- Brought the problem to the local Ford dealer. They swapped a known good control box(under passenger seat)from another Galaxy into mine and found a front sensor defective(none were working with my control box). Replaced the original control box and- still noy working. I had to order a new control box. New box arrived- plugged it in-now front transducers work but one of the rear ones was defective. The garage had made sh1t of the transducer taking it out and replaced it with the wrong orientation!!! Which, by the way, is impossible! Ordered a new transducer on ebay for half of what the garage is looking for-

Edited August 11, 2008 by niallsan

[Kieran McCarthy]

My sensors stopped working like everyone above.

Continuous 4 second beep when engaged and then nothing but a flashing light in the switch.

 

So using the tip on this forum I went around to each sensor listening for the clicking.

I found one at the back that was not making any noise so I got on to Ebay and ordered: Reversing sensor 7M3 919 275A Ford Part no: 1 208 836

 

this arrived and I stuck the sensor in the bumper. :31:

Still no joy. :D

 

So I checked for the clicking again.

All sensors are making a noise, including the replacement. However the replacement is clicking twice as fast as and a bit louder than all the others.

 

I haven't been able to get my laptop to talk to VAG-COM yet.

Without this could anyone suggest what could be the problem?

 

Could it be the park assist module. I did have the puddle in the front.

Or a dodgy replacement sensor?

 

:16:

Kieran

[Taliska]

Two dodgy on mine - ouch.

 

Taliska

[Grazzer]

Help!

 

Galaxy MKII Newbie.

 

My front passenger side sensor doesn't TICK, so I've purchased a new one off fleabay for

[ZIGGY]

My sensors stopped working like above.

4 second beep when engaged and then nothing but a flashing light in the switch.

but control box dry, all sensors ticking checked everything any ideas on what to do next

[sainot]

Help!

 

Galaxy MKII Newbie.

 

My front passenger side sensor doesn't TICK, so I've purchased a new one off fleabay for

[sainot]

Anyone got any parking sensors for sale?

[Munter]

Anyone got any parking sensors for sale?

 

ebay. Theres guy on there selling new ones from Portugal

[prezo1]

Hi, I have a 2000 Galaxy 1.9TD Zetec, just reading some of the postings and found others have had the same problem with the rear washer conenction coming undone under the passenger footwell ! I am sure I glued mine back in with superglue !

Anyway, my problem of the moment is the parking sensors, you dont know how much you rely on them until they are broken !

When I go into reverse, the rear ones bleep constantly for about 8 seconds then go quiet, with the switch at the front of the car flashing. The front ones do not give a whimper at all.

I was wondering where the control unit was for it and also wondered if a faulty snesor was unplugged, would the others work OK - does the system go to fault state if one is unplugged ? What is the wiring config for them ? I notice the 4 sensors are wired to a plug (only 6 connectors used) in the area behind the rear left light cluster. I guess one is +12V and one is return, and each of the other 4 are a sensor's output each ? Can I disconnect 1 or do I put one to 12V to test the other 3 ? How do I test if a sensor is gubbed ?

 

Any help much appreciated.

 

hope someone knows the answer to this i have the same problem.

[Mirez]

I was wondering where the control unit was for it and also wondered if a faulty snesor was unplugged, would the others work OK - does the system go to fault state if one is unplugged ? What is the wiring config for them ? I notice the 4 sensors are wired to a plug (only 6 connectors used) in the area behind the rear left light cluster. I guess one is +12V and one is return, and each of the other 4 are a sensor's output each ? Can I disconnect 1 or do I put one to 12V to test the other 3 ? How do I test if a sensor is gubbed ?

 

hope someone knows the answer to this i have the same problem.

 

The controller is under the front passenger seat and contains the front speaker, the rear speaker is behind the rear light cluster

 

If you unplug one sensor the system will indeed go to a fault state and won't work at all

 

Wiring is +12V, Ground and Signal

 

You can't mimic the signal easily as its a square wave so would need a signal generator - you would probably kill the controller popping 12V down the signal line! :rolleyes:

 

Easiest way is to find someone with VagCom who can simply plug in and tell you exactly which sensor is causing the problem, else the old listen for a ticking noise test - though that'll only tell you if the sensor is (or isn't) sending out its ultrasonic pulses, not if its reporting back correctly.

[sugs]

Hi

Can anyone answer the two people who have asked how do you access the front parking sensors - does the bumper have to come off? I have the same problem - I have replaced a non-ticking rear sensor and have one that doesnt tick at the front and so need to replace this. If anyone has done it please help!

Thanks

[Danny Barratt]

Hi

Can anyone answer the two people who have asked how do you access the front parking sensors - does the bumper have to come off? I have the same problem - I have replaced a non-ticking rear sensor and have one that doesnt tick at the front and so need to replace this. If anyone has done it please help!

Thanks

 

 

Hi Just push the bumper insert forwards and it slides out, you can then drop it forward and disconnect the sensors, no need to remove the bumper, I did this on my 2002 model. Hope that helps

[Steve T]

Great post. Just so happens my colleague had a VAG.COM lead. installed on laptop, followed instructions....

 

great news is that the interface worked. bad news is only 4 of the 8 sensors are working.

 

Out of curiosity I put my ear next to them and there was an obvious ticking from the working ones and a dead silence from the faulties.

 

 

Suppose I better get my fault finding head on now and test the wiring by swapping and changing the faulty sensors to the position of the good one and visa versa..

 

Thanks all for the info. Very helpful.

[Andy Young]

Try these guys for cheap Ford Car Parts.

[Mikef]

I have the problem of the rear sensors finding something that isnt there, giving a continous tone as soon as reverse is engaged...after reading through these notes, I've gone listening/feeling for the ticking sound, and all of them are making it.

 

Am I correct in thinking that even if they are all ticking, it doesnt mean they are necessarily working properly, and the only way to diagnose from here is to get the VAG lead?

 

cheers!

 

mikef

[Mikef]

My job tomorrow is to apply liberal doses of WD40...if that fails I'll get one of the VAG cables, and I'll go hunting for the posts on how to get them and use them...Any ideas on what else I could look for while I'm under the car?

 

cheers

 

mikef

[Mirez]

Mike, what are you planning to WD40? The sensors? Not ideal mate! Which ones have failed? If there is no ticking noise then its also possible that its not receiving power - the wiring loom is known to break just before each rear sensor, I'd check that first. IIRC Greggers lives near you, I'm sure he'll scan the car for you for the price of a pint :rolleyes:

[Mikef]

Mike, what are you planning to WD40? The sensors? Not ideal mate! Which ones have failed? If there is no ticking noise then its also possible that its not receiving power - the wiring loom is known to break just before each rear sensor, I'd check that first. IIRC Greggers lives near you, I'm sure he'll scan the car for you for the price of a pint :rolleyes:

 

Hi - all of my rear sensors seem to work ( all of them 'tick'), so I'm not quite sure what to do next. I read on one of the threads here that people had disconnected the sensors at the bumper and cleaned up the connection which worked for some...so I thought I'd give it a go!

 

Happy to buy people pints or sticky buns if anyone could help! :-)

 

mike

 

ps - the problem I have is that the rear sensors detect things that aren't there, then produce one long continous tone. Its only once the sensors stopped working properly that I realised how much I rely on them!!

[Mikef]

Wiggled the wires behind the bumper but to no avail...any thoughts on next steps anyone?

 

 

cheers

 

mikef