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Retrofit front parking sensors
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webego
 


Member Since: 06 May 2015
Location: Bromley
Posts: 331

England 2012 Discovery 4 3.0 SDV6 Base 7 Seat Auto Orkney GreyDiscovery 4

That's a great idea! Although the inners and the outers have a different code on the box. These are aftermarket sensors BTW, not originals.

https://www.ebay.co.uk/itm/LAND-ROVER-DISC...2749.l2649

https://www.ebay.co.uk/itm/LAND-ROVER-DISC...2749.l2649

And this was the harness I used?

https://rimmerbros.com/Item--i-YMQ501631

Anyone used the same with success?
  
Post #198600924th Sep 2018 12:49 pm
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Pete K
 


Member Since: 15 Jan 2016
Location: GL
Posts: 10336

England 2005 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

Quote:
(had to spray the two inner ones as they only came primed,



I believe PMA on the end of the part number means in PRIMER, hence why you had to spray them Rolling with laughter

The sensor is the same for all 8 on the car.
I thought the front corners on D3 may have the right angled connectors (straight on others usually )

BUT THE SENSOR PART IS THE SAME

just a case of fitment and colour for different part number
  
Post #198610524th Sep 2018 5:54 pm
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Pete K
 


Member Since: 15 Jan 2016
Location: GL
Posts: 10336

England 2005 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

Quote:
but when freaked out the inner ones in particular were flickering between around 0.4 ish and 2.5m



Are you also saying the ones you sprayed are the ones giving a problem.

Do you think that is a coincidence ?

Not that I would know how you correctly spray one.


p.s In fairness, lr-trade-parts-uk seam to sell mostly primered ones, which is a bit of a pain.
  
Post #198610724th Sep 2018 6:00 pm
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webego
 


Member Since: 06 May 2015
Location: Bromley
Posts: 331

England 2012 Discovery 4 3.0 SDV6 Base 7 Seat Auto Orkney GreyDiscovery 4

Thanks Pete,

I didn't paint any of the sensors, I only painted the inner bezels as they were only primed (the outers were already black). Both the bezels and the sensors carry the same code on the end depending on position but regardless of colour or paint state i.e. outers = PMA and inners = LML. All my sensors are black but were marked as YDB500311LML for the inners and YDB500311PMA for the outers. They are however all right angled so they might well be the same sensors.

So I can't have damaged the sensors but I suppose there is a very small chance the paint on the bezels is boucing something back? I can't imagine that to be the case though as the sensors sit pretty flush with the bezel. I'll take another look tomorrow in daylight to see if that could be the case.

What I did get a chance to do tonight was put the car in reverse with the engine switched off and parking brake off. Nipped around all 8 sensors, front & rear, and all were clicking so seems they are all working. Also did the live values again and just as before, the front inners flicker between full range (2.5m) and 0.x. Doesn't always happen straight away but it does happen every time.

Also went for a spin and as expected the front sensors stopped sounding after I get over about 10mph and come back on when I drop under 10mph.

Basically everything seems to be working as expected with the exception of these two inners going a bit nuts.
  
Post #198623724th Sep 2018 10:40 pm
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webego
 


Member Since: 06 May 2015
Location: Bromley
Posts: 331

England 2012 Discovery 4 3.0 SDV6 Base 7 Seat Auto Orkney GreyDiscovery 4

All looks fine, nothing out of the ordinary on the bezels. So as mentioned, all sensors are clicking and activating when they should, the loom is brand new also. All sensors show up on IID too.

I'll order a couple of replacements for the inners anyway as suggested just in case they are still somehow faulty regardless of the clicking. But what else could cause this? The socket under the headlight? The loom through to the parking aid module? The parking aid module itself?

Should I test these items with a MM somehow? If so, any pointers on what/how to test would be greatly appreciated.

Thanks
  
Post #198636625th Sep 2018 11:27 am
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gstuart
 


Member Since: 21 Oct 2016
Location: kent
Posts: 13576

United Kingdom 2005 Discovery 3 TDV6 Base 7 Seat Auto Java BlackDiscovery 3

Hi mate

Just looked on the iid menu under live values and noticed a section called “ front parking aid “

Was just wondering on the off chance if you’ve looked and what this section tells u

Also wondering if u had a hertz setting on ur multimeter if there’s any possibility of comparing ur sensors through using this setting , alas never used that before on mine or if it’s any good for this type of test , as in the frequency is the same for all x 8 ???

Alas the guys here will have more knowledge ref the HZ setting

Same with the incoming voltage / earths on each wire that there all the same , should be 100% seeing there new sensors and loom


   
Post #198658026th Sep 2018 2:06 am
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webego
 


Member Since: 06 May 2015
Location: Bromley
Posts: 331

England 2012 Discovery 4 3.0 SDV6 Base 7 Seat Auto Orkney GreyDiscovery 4

Yeah, looked at those. That is how I know both the inners start flicjering between 2.5 and 0 x.

Haven't done any MM testing yet. Will do when I take the bumper off again at the weekend though.

A few pointers of what to check would be great.
  
Post #198661626th Sep 2018 8:33 am
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gstuart
 


Member Since: 21 Oct 2016
Location: kent
Posts: 13576

United Kingdom 2005 Discovery 3 TDV6 Base 7 Seat Auto Java BlackDiscovery 3

Hi mate

Ah perfect , that’s that then Rolling with laughter

Indeed strange why just those 2 x inner ones are flickering , considering the loom and all the sensors are new

Think personally I would do the following when the bumper is removed

MM on ohms and test each wire on the loom to ensure 100% sound

Still on ohms , testing the earth wires at the connectors , ie maybe dirty and not allowing a sound earth connection

Then there’s the PDC Ecu behind the panel, are those connections there sound , properly clipped into the module

Could also test the wires from the module to the connector behind the headlight , just link 2 x wires one end and test the other

As the loom runs in the floor channel could there be any possibility of water ingress

When u get the new ones , fingers crossed it will sort all the issues out

Alas know that’s not much help to u Thumbs Up
   
Post #198663626th Sep 2018 10:27 am
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Pete K
 


Member Since: 15 Jan 2016
Location: GL
Posts: 10336

England 2005 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

I had a rear one that was (very intermittent) like your issue.

When the fault occurred, I plugged the IID in, saw what you are seeing.

Ordered and replace sensor, and fault went
  
Post #198665326th Sep 2018 11:19 am
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webego
 


Member Since: 06 May 2015
Location: Bromley
Posts: 331

England 2012 Discovery 4 3.0 SDV6 Base 7 Seat Auto Orkney GreyDiscovery 4

Thanks Pete,

I ordered a couple of new ones from a different supplier and they should be with me before the weekend. Fingers crossed that will sort the issue. Suppose the new ones I have in could be from a bad batch? Hopefully all will become clear at the weekend when I get the bumper off again.
  
Post #198666126th Sep 2018 11:39 am
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Roidster
 


Member Since: 04 Nov 2016
Location: London/Herts
Posts: 137

United Kingdom 2005 Discovery 3 TDV6 HSE Auto Zambezi SilverDiscovery 3

I had same issue with cheap non genuine sensors. Ended up buying genuine (but cheap on eBay). Use the iiD graphs to really see what is going on as the screen you showed with the values is too slow to tell the whole picture. Here is my thread with lots more info..... http://www.disco3.co.uk/forum/front-parkin...=Front+pdc
 2005 Discovery 3 HSE
(RLD Wheel Protector, Altox FBH Remote, IID Tool) Viscous Fan spanner’s Available to lend

Audi Q2 1.4 TFSi Edition #1 (SWMBO's)

Previous:

BMW E60 M5 5.0 V10
BMW 330Ci Sport Convertible 


Last edited by Roidster on 27th Sep 2018 9:44 am. Edited 1 time in total 
Post #198696027th Sep 2018 9:38 am
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webego
 


Member Since: 06 May 2015
Location: Bromley
Posts: 331

England 2012 Discovery 4 3.0 SDV6 Base 7 Seat Auto Orkney GreyDiscovery 4

Cool, this one?
https://www.disco3.co.uk/forum/front-parki...58262.html
  
Post #198696527th Sep 2018 9:43 am
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Roidster
 


Member Since: 04 Nov 2016
Location: London/Herts
Posts: 137

United Kingdom 2005 Discovery 3 TDV6 HSE Auto Zambezi SilverDiscovery 3

Yep
 2005 Discovery 3 HSE
(RLD Wheel Protector, Altox FBH Remote, IID Tool) Viscous Fan spanner’s Available to lend

Audi Q2 1.4 TFSi Edition #1 (SWMBO's)

Previous:

BMW E60 M5 5.0 V10
BMW 330Ci Sport Convertible 
 
Post #198696627th Sep 2018 9:45 am
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webego
 


Member Since: 06 May 2015
Location: Bromley
Posts: 331

England 2012 Discovery 4 3.0 SDV6 Base 7 Seat Auto Orkney GreyDiscovery 4

Damn, and I bought the same initial ones as you Censored
  
Post #198696827th Sep 2018 9:46 am
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webego
 


Member Since: 06 May 2015
Location: Bromley
Posts: 331

England 2012 Discovery 4 3.0 SDV6 Base 7 Seat Auto Orkney GreyDiscovery 4

A delayed update on this. Ordered replacements from a "Fast Shipping" shop on fleabay but ended up taking a week and a half! Anyways, had a cheeky hour and a half to whip the front bumper off (so much quicker when you know how) and I sat it on a small chair in front of the car still connected. Bear in mind I already know all four sensors where clicking but the idea was to swap them out for the new ones just in case.

However, when I did a quick test before any swapping, everything worked properly!!! Couldn't believe it. I unplugged the loom and sprayed some contact cleaner in there for good measure anyway. So as I didn't have long I started to put everything back on and kept testing several times as I went along. Got the whole front end back together, tested again and still fine. Promising I thought. Then I went for a spin......

Of course the constant beep returned but it didn't seem to start until I did a U-turn and faced it uphill. As mentioned the loom is brand new as are all the front sensors and clearly they work properly sometimes. So where is this issue originating?

I guess that as it only happens when I'm in motion and seemingly uphill it must be a bad connection somewhere. I suppose it could still be the sensors but both the fronts at the same time? Thinking it must be somewhere else.

Next step, I'm going to take the rear panel off to check the module's connections. Failing that I'm going to have to give myself a crash course in multi-meter and somehow check all wires from module through to the plug under the headlight, and if I have to, take the bumper of again and do the same.
  
Post #19893135th Oct 2018 8:36 pm
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