E61 PDC Wierdness

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   I wonder if anyone can offer some insight:

When I reverse out of my drive in the morning the PDCs all work fine. When I reverse into my work parking space 30 minutes later, 2 or 3 of the rear PDC sensors go onto a continuos beep and stay like that until it switches itself off. 

When I leave work at the end of the day, everything is fine again until I get home and then it starts the continuous beep again. 

This happens almost every day but not 100% of the time.

I've checked each sensor and they are all clicking. I've given them all a gentle tap, squirted with WD-40. This has been going on for a couple of months.

My 1st thoughts are that the PDC Control Module is on the way out. Has anyone replaced one of these?

Any other ideas?

Thanks

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Tonemapper Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 18-June-2014 Status: Offline Points: 3	Post Options Post Reply Quote Tonemapper Report Post Thanks(0) Quote Reply Topic: E61 PDC Wierdness Posted: 18-June-2014 at 12:19
	I wonder if anyone can offer some insight: When I reverse out of my drive in the morning the PDCs all work fine. When I reverse into my work parking space 30 minutes later, 2 or 3 of the rear PDC sensors go onto a continuos beep and stay like that until it switches itself off. When I leave work at the end of the day, everything is fine again until I get home and then it starts the continuous beep again. This happens almost every day but not 100% of the time. I've checked each sensor and they are all clicking. I've given them all a gentle tap, squirted with WD-40. This has been going on for a couple of months. My 1st thoughts are that the PDC Control Module is on the way out. Has anyone replaced one of these? Any other ideas? Thanks

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Andrew Rolland Members Profile Send Private Message Find Members Posts Add to Buddy List Moderator Group Go away rain Joined: 19-August-2004 Location: Scotland Status: Offline Points: 6579	Post Options Post Reply Quote Andrew Rolland Report Post Thanks(0) Quote Reply Posted: 23-June-2014 at 13:01
	Hi and welcome to the forum. Have you polished the car? The sensors need to be clean and a layer of wax or sealent over them may upset them. I only had to replace a sensor when mine failed by listening for the one that doesn't click. Never had to mess with the control unit though.
	Be exclusive and drive a Petrol 5 Series! Current '13 62 F10 535i MSport Auto Previous '04 04 E60 545i SE Auto '03 53 E60 545i SE Auto (Stolen) '98 S E39 523i SE Auto

Crispy-d Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member I Joined: 07-May-2008 Location: Ipswich/Bristol Status: Offline Points: 130	Post Options Post Reply Quote Crispy-d Report Post Thanks(0) Quote Reply Posted: 09-July-2014 at 22:30
	Hello, Random stab in the dark but it sounds like it only happens once the car is warm, suggesting that it could be something on the sensors as Andrew suggests. And I only say that as the exhausts do get hot, even on the diesels so it could be that a coating on them gets a little gelatinous after half an hour on the road. Just a guess but I would certainly start by cleaning them thoroughly and possibly even wiping them with a gentle solvent to remove any grime or grease.
	BMW E39 M5 - 2002 Land Rover 110 4.0 V8 - 1986 BMW E39 530d Manual SE - 2001 BMW E34 540i 6 Speed Manual - 1995 Volvo S90 3.0 CD - 1997 Volvo 460 Si Turbo - 1995 Volvo 340 GL - 1989

Tonemapper Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 18-June-2014 Status: Offline Points: 3	Post Options Post Reply Quote Tonemapper Report Post Thanks(0) Quote Reply Posted: 11-July-2014 at 14:19
	Crispy, Good thought however it can start to happen even after only a very short distance. I've tried cleaning them (not by removing them), WD40 etc. Thanks.

Howard Members Profile Send Private Message Find Members Posts Visit Members Homepage Add to Buddy List Moderator Group Did I say thaaaat? Joined: 14-October-2002 Location: United Kingdom Status: Offline Points: 735	Post Options Post Reply Quote Howard Report Post Thanks(0) Quote Reply Posted: 15-October-2014 at 19:08
	I had a similar problem on my E38. PDC bleeped continuously. After a while I noticed that if it was dry weather, then it all worked fine so I waited until it was raining and took it to my dealer. Turned out the inner right rear was causing the problem. I replaced it with a new one (easy for this - not so easy for the outers) and have had no problem. Looked like it had some water in it when I checked it over after removal.
	1963 700 LS 1988 635 CSi 1990 M635 CSi no longer! 2001 E38 728i Individual http://www.tyneships.co.uk