I reversed into my drive last night & left the D3 parked in there overnight.
When parking last night the reverse gear warning tone worked normally.
I left home first thing this morning for a 150 mile round trip, and when I got back & again reversed into the drive the reverse gear tone sounded continuously whilst reverse gear was selected.
Nothing special about this morning's drive, mostly motorway.
Any idea of what the fault might be please, & how do I fix it?
NJSSAm I Gammon or Woke ? - I neither know nor care.
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10th Feb 2013 1:40 pm
geoff.
Member Since: 24 Jan 2010
Location: West kent
Posts: 8531
NJSSAm I Gammon or Woke ? - I neither know nor care.
2016 Discovery 4 Landmark
2011 Mercedes Benz SL350 (R230)
1973 MG B GT V8 - 3.9L John Eales engine, 5 speed R380 gearbox, since 1975.
1959 MGA roadster - 1.9L Peter Burgess Engine - 5 speed gearbox
Past LRs - Multiple FFRs, Discos & a Series I - some petrol, some diesel,
none Electric or H2 fuel cell - yet.
There are 10 types of people in this world: Those who understand binary, and those who don’t.
10th Feb 2013 1:48 pm
Narpy
Member Since: 18 Jul 2011
Location: Stockport
Posts: 7830
If you've been down the motorway check the back of the car. If it's really heavily coated in that horrible white winter road grime ( which it will be ) give it a wash, well..........at least clean the sensors.
Mine did exactly this after a 50 mile trip. Cleaned the sensors and normal service was resumed.
Wipe with a damp cloth then come back and thank me for saving you a fortune. Mods:
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Last edited by Narpy on 10th Feb 2013 1:57 pm. Edited 1 time in total
10th Feb 2013 1:56 pm
sean 471
Member Since: 26 Apr 2011
Location: Sheffield
Posts: 2990
Make sure the sensors are clean. Mine gives a continuous bleep sometimes when they are dirty.
10th Feb 2013 1:56 pm
geoff.
Member Since: 24 Jan 2010
Location: West kent
Posts: 8531
as said above give the sensors a wipe
ps if it still there it will need plugging in to find out which sensor is giving you the trouble
10th Feb 2013 1:59 pm
yogi972
Member Since: 05 Jun 2011
Location: Kineton
Posts: 3372
Put car with engine off but ignition on, into reverse.
Put yer finger by each sensor and if it ticks (very quietly hence engine off)
Then that sensor is ok (at that time ) one that are silent are the culprits, then its either that sensor or wiring loom in bumper that is chafed etc. I replaced both inner sensors and loom which sorted me out
Thanks to TLO for the parts as ever
10th Feb 2013 2:08 pm
MARKW
Member Since: 29 Aug 2008
Location: SW
Posts: 2390
Is it bumper off to sort/change sensors?HONI SOIT QUI MAL Y PENSE
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10th Feb 2013 4:26 pm
yogi972
Member Since: 05 Jun 2011
Location: Kineton
Posts: 3372
If its the outer ones, then its possible to reach in and remove , but Deffo a number off job for two inner ones
But it's dead easy to pop bumper off (after undoing seazed screws on mud-flaps)
10th Feb 2013 4:33 pm
Disco_Mikey
Member Since: 29 May 2007
Location: Dundee, Scotland
Posts: 20733
yogi972 wrote:
Put car with engine off but ignition on, into reverse.
Put yer finger by each sensor and if it ticks (very quietly hence engine off)
Then that sensor is ok (at that time ) one that are silent are the culprits, then its either that sensor or wiring loom in bumper that is chafed etc. I replaced both inner sensors and loom which sorted me out
Ignition on, EPB off, and into reverse PDC does not work with the handbrake on
The rest of the info is correct. The sensors give out a very fast, faint "tick" noise. The ones that dont tick is where the fault lies. All of the sensors can be removed without removing the bumper, and can be swapped round quite easily to diagnose a sensor, or wiring issue My D3 Build Thread
Last edited by Disco_Mikey on 10th Feb 2013 5:49 pm. Edited 1 time in total
10th Feb 2013 4:34 pm
crwoody
Member Since: 09 Mar 2009
Location: Littleborough
Posts: 2109
I had the same problem last year, it started as an intermittent fault which cleared after jet washing round the sensors, it eventually became a permanent fault on the nearside sensor which I replaced with a new one from TLO.
When I pulled (broke) the old one apart, it was wet and badly corroded inside.
I suspect the nearside one may be the most common one to fail, it gets the worst of the crud spray from roadside puddles.Clive
10th Feb 2013 4:47 pm
geoff.
Member Since: 24 Jan 2010
Location: West kent
Posts: 8531
all sensors can be done without taking the bumper of its a fiddly but can be done
10th Feb 2013 4:58 pm
yogi972
Member Since: 05 Jun 2011
Location: Kineton
Posts: 3372
Blimey what's this? 'Correct Yogi day' or summat!?
Yeah I forgot about the epb, and Geoff rather you than me I kinda like the skin on my Arms especially when they are worth money.....
10th Feb 2013 5:26 pm
geoff.
Member Since: 24 Jan 2010
Location: West kent
Posts: 8531
your dead right it does take a bit of skin off
10th Feb 2013 5:41 pm
sacimiddx
Member Since: 09 Mar 2007
Location: hants
Posts: 2143
geoff. wrote:
all sensors can be done without taking the bumper of its a fiddly but can be done
Geoff you should become a keyhole surgeon with your skills - those centre PDC'S are a gynaecologists dream ( or nightmare)
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but can be done 
