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Peculiar Parking Sensor Issue (PDC)
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Yozza
 


Member Since: 01 Mar 2020
Location: Stoke-on-Trent
Posts: 19

United Kingdom 
Peculiar Parking Sensor Issue (PDC)

Hello, I have read numerous posts regarding PDC issues, but I can't find any answers for the issue I seem to have...
I have never had the PDC working since I bought the car (D3 '05 HSE Auto) in March. Initially I had a warning on the display 'Front Parking Distance Aid Inactive'. I replaced one of the front non-clicking sensors and also had a garage look at the issue. They garage got rid of the warning (software update I think), and even after replacing the other three front sensors still had no luck. The sensors bleep at me regardless of any obstacles and also when driving at low speed. I have now resorted to turning off the PDC every time I start the car.

I have had the front bumper off and done a continuity check and inspected the wiring loom for any chaffing.

I have noticed that the sensors appear to work when either in R or D with the ignition on and brake off. I can walk around the car and the front and rear sensors bleep as and when they should. However, if I start the engine the sensors return back to crazy mode and bleep constantly regardless of obstacles.

What difference is the engine running making???

I am starting to loose my sense of humour and I don't want to give my ol' man any more ammo as he drives a Land Cruiser (and so did I until I bought this Disco) Shocked

Any suggestions/tips greatly appreciated

Yozza
  
Post #215054331st May 2020 8:19 pm
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Pete K
 


Member Since: 15 Jan 2016
Location: GL
Posts: 5980

England 2005 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

I heard this before on here.
The electrical noise from the alternator is upsetting one of the front ones.

Buy a couple and swap out if it’s easy to repeat
Sounds like you need an assistant n the car and some chocks would be a good idea
  
Post #215055431st May 2020 8:57 pm
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Yozza
 


Member Since: 01 Mar 2020
Location: Stoke-on-Trent
Posts: 19

United Kingdom 

Thanks for the reply. I've had all four front sensors replaced so unless the 'noise' is still affecting one of the new ones???

Do you know which thread discussed the electrical noise?
  
Post #21509862nd Jun 2020 12:38 pm
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Pete K
 


Member Since: 15 Jan 2016
Location: GL
Posts: 5980

England 2005 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

It can happen on new ones.
  
Post #21509892nd Jun 2020 12:44 pm
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Nasher
 


Member Since: 07 Mar 2009
Location: Clanfield, North of Pompey - UK
Posts: 2248

England 2016 Discovery 4 3.0 TDV6 HSE Lux Auto Loire BlueDiscovery 4

Do you know if the previous owner changed the Alternator?

I had this and other small electrical problems on my 55 D3 HSE when I replaced the Alternator with a cheap rebuilt one off Ebay.

Swapping it out again for a new genuine LR one sorted it and the other issues.

Luckily the original vendor took theirs back and gave me a full refund.

I had a theory that a stray EMC emission from the badly rebuilt Alternator was effecting the CANBUS signal via one of the ECUs that live in the engine bay.

Nasher.
 Heaven doesn't want me, and hell is afraid I'll take over.  
Post #21510052nd Jun 2020 2:02 pm
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Yozza
 


Member Since: 01 Mar 2020
Location: Stoke-on-Trent
Posts: 19

United Kingdom 

I’ve got some vehicle history but I don’t see anything about a replacement alternator however I’ll have a look underneath the bonnet. Thanks for the replies
  
Post #21510292nd Jun 2020 3:55 pm
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Stu_rs
 


Member Since: 24 Nov 2012
Location: Essex
Posts: 28

United Kingdom 2006 Discovery 3 TDV6 HSE Auto Zambezi SilverDiscovery 3

Keep us posted on this, I have the same issue and am keen to see how you get on. Diagnostic tool (icarsoft LRII) didn’t give me any clues either.

Good luck!
  
Post #21511242nd Jun 2020 10:12 pm
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Yozza
 


Member Since: 01 Mar 2020
Location: Stoke-on-Trent
Posts: 19

United Kingdom 

Had a look at the alternator, it’s a Denso (see pic). Are they genuine LR as I didn’t see any logo?
I’m not sure if it’s related (I hope it is). I noticed a while ago that there looked like an earthing cable missing from around the transmission area. I bought a replacement but I noticed the cable’s label description is an RFI suppression cable! Could this cable be the answer? And more importantly where does it fit, it looks like it takes M8 screws, but I’ve looked around the tranny and can’t see any thing obvious? Any pointers???






  
Post #21521297th Jun 2020 2:53 pm
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Pete K
 


Member Since: 15 Jan 2016
Location: GL
Posts: 5980

England 2005 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

it's worth fitting.

not sure where it goes though!
  
Post #21521417th Jun 2020 4:17 pm
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gstuart
 


Member Since: 21 Oct 2016
Location: kent
Posts: 8617

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

Hiya

It says the cable is from the transfer box to body , alas doesn’t show it in the picture of exact location

Maybe it uses one of the transfer box casing bolts


 MY 2005 -D3- TDV6-Java black -Auto
**** D3 - Sticker ****
T- Max Split charge system
Egrs blanked
Dash Clock
3x indicator flash
Belts and upgraded oil pump cover

Retrofitted Front electric seats-( removed seat memory ECU and made up new seat loom so constant power to both seats )
D4 steering wheel stalks
D4 steering wheel with cruise
D4 retrofitted complete loom and windscreen heated washer jets 
 
Post #21521557th Jun 2020 5:32 pm
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aja4x4
 


Member Since: 14 Apr 2019
Location: Westbury
Posts: 703

United Kingdom 2005 Discovery 3 TDV6 SE Auto Zambezi SilverDiscovery 3

I have had a problem on another vehicle which turned out to be a poor engine earthing causing feedback through the engine loom to the ecu.
Adding extra earth wires solved my issue and wont cause any harm to you vehicle, you can buy braded straps from halfords in varying lengths. They just need to attach to a bolt on the engine and a good earth point on the chassis.

If you want to rule it out you can use a jump lead from the engine to the negative battery terminal.
  
Post #21521637th Jun 2020 5:50 pm
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Yozza
 


Member Since: 01 Mar 2020
Location: Stoke-on-Trent
Posts: 19

United Kingdom 

Thanks for the pic, the orientation of the cable might be clue...

Any feedback on the Denso alternator??? The genuine article or an after market replacement?
  
Post #21521897th Jun 2020 7:30 pm
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JMack
 


Member Since: 02 Aug 2014
Location: Edinburgh
Posts: 1446

Scotland 2006 Discovery 3 TDV6 Commercial Manual Java BlackDiscovery 3

That looks like the correct alternator. The same markings as the Denso one on Advanced Factors website.(DAN987)
  
Post #21522247th Jun 2020 10:26 pm
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Yozza
 


Member Since: 01 Mar 2020
Location: Stoke-on-Trent
Posts: 19

United Kingdom 

Thanks, so next job is to find the home for this cable!
  
Post #21522307th Jun 2020 11:54 pm
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gstuart
 


Member Since: 21 Oct 2016
Location: kent
Posts: 8617

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

Found it, ref the earth cable Thumbs Up

Hope it helps

Click image to enlarge
 MY 2005 -D3- TDV6-Java black -Auto
**** D3 - Sticker ****
T- Max Split charge system
Egrs blanked
Dash Clock
3x indicator flash
Belts and upgraded oil pump cover

Retrofitted Front electric seats-( removed seat memory ECU and made up new seat loom so constant power to both seats )
D4 steering wheel stalks
D4 steering wheel with cruise
D4 retrofitted complete loom and windscreen heated washer jets 
 
Post #21522328th Jun 2020 12:04 am
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