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PDC sensors activation?
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rrhool
 


Member Since: 28 Aug 2014
Location: Norfolk
Posts: 4398

United Kingdom 2007 Discovery 3 TDV6 SE Manual Zermatt SilverDiscovery 3
PDC sensors activation?

I'm trying to diagnose a parking sensor failure, and have read in many threads that you can listen to them?
I can't get the PDC system to work without the engine running, and therefore can't hear the sensors above the engine!

Is there a function in the IId?


Click image to enlarge
 Richard


D3 SE 2007. Triumph 2.5Pi 1973. Ferguson TEA20 1948.



Discovery 2 4.0 ES 2001- Gone
Discovery 1 300Tdi ES '95 - Gone
Range Rover Classic '79 - Gone 
 
Post #194646119th May 2018 9:53 am
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DN
D3 Decade 


Member Since: 23 Jun 2006
Location: W.London.
Posts: 2289

Ukraine 2006 Discovery 3 TDV6 Base 7 Seat Auto Zambezi SilverDiscovery 3

There is a function on the IID, in live readings. One of my sensors showed 0 range when it should have been 2.5, even though when I had previously put the car in reverse with the ign on (engine not running) all sensors could be heard 'clicking' with my ear up close to them. So listening to them is not necessarily a good way of diagnosing Rolling Eyes I replaced that sensor, and had previously replaced the wiring loom (12yrs old) whilst I had the rear bumper off, and all is working again now. Thumbs Up I must say, I found the process iffy to say the least, after changing the loom, and connecting it up before actually refitting the bumper, all was working normally Rolling Eyes it was later, after I had refitted the bumper, that the continuous beep fault returned again. Luckily it was the outer r/h sensor at fault, and I could just about get to it to change it, with the bumper cover on.
 D3 owned from new, P017 brake recall, BAS FBHIC, new FBH, LR013487 oil pump, new water pump. RRS front lower suspension arms. New suspension compressor/ relay. New Denso alternator. CuNifer rear brake pipes. New GKN rear propshaft. New HPFP belt & tensioner. New A/C Condenser.NO WARRANTY for many many years.  
Post #194646419th May 2018 10:08 am
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rrhool
 


Member Since: 28 Aug 2014
Location: Norfolk
Posts: 4398

United Kingdom 2007 Discovery 3 TDV6 SE Manual Zermatt SilverDiscovery 3

Thanks DN.

I tried a new sensor in each position, with no luck. Then I had a closer look at the loom, and guess what!



To be fair, the IId did report 'Outer Right' and it was the blue wire to the outer right sensor that was broken.
 Richard


D3 SE 2007. Triumph 2.5Pi 1973. Ferguson TEA20 1948.



Discovery 2 4.0 ES 2001- Gone
Discovery 1 300Tdi ES '95 - Gone
Range Rover Classic '79 - Gone 
 
Post #194648719th May 2018 11:44 am
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DN
D3 Decade 


Member Since: 23 Jun 2006
Location: W.London.
Posts: 2289

Ukraine 2006 Discovery 3 TDV6 Base 7 Seat Auto Zambezi SilverDiscovery 3

Ah, well hopefully an easy fix Thumbs Up I recommend that you check extensively that it all works BEFORE refitting the bumper. Laughing
 D3 owned from new, P017 brake recall, BAS FBHIC, new FBH, LR013487 oil pump, new water pump. RRS front lower suspension arms. New suspension compressor/ relay. New Denso alternator. CuNifer rear brake pipes. New GKN rear propshaft. New HPFP belt & tensioner. New A/C Condenser.NO WARRANTY for many many years.  
Post #194650619th May 2018 12:55 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

it should work with engine off.

park brake needs to be off though

so ur, yours being a manual, its probably applying it automatically
  
Post #194654819th May 2018 4:44 pm
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rrhool
 


Member Since: 28 Aug 2014
Location: Norfolk
Posts: 4398

United Kingdom 2007 Discovery 3 TDV6 SE Manual Zermatt SilverDiscovery 3

Thanks. I'm not sure I've tried it with the park brake off. Will try again tomorrow.

I spent all day doing this, wheel arches off, bumper off, arch liners out (replaced the arch trim while I was in there), fixed the broken wire.

Tested the sensors worked before fully installing the bumper, all good.

Finished rebuilding the car, and guess what, the PDC doesn't work now! Banging Head Banging Head

Constant tone like the car is close to something. Not the same high tone when the wire was broken. Still from the rear. IId doesn't detect any faults.

Very frustrating!
 Richard


D3 SE 2007. Triumph 2.5Pi 1973. Ferguson TEA20 1948.



Discovery 2 4.0 ES 2001- Gone
Discovery 1 300Tdi ES '95 - Gone
Range Rover Classic '79 - Gone 
 
Post #194656019th May 2018 5:17 pm
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