DISCO3.CO.UK - View topic - Yet another parking sensor problem...

Chris1969

Member Since: 21 Jun 2011
Location: North Worcestershire (not far from Redditch)
Posts: 385

2005 Discovery 3 TDV6 HSE Auto Alveston Red

Yet another parking sensor problem...

Hi folks...

Quick story to set the scene to get some advice. I've got a 2005 D3 with front and rear parking sensors. Had an intermittent problem with the rear sensors September last year. In the end, I replaced the rear loom and all 4 sensors as I couldn't pin down exactly the problem.

Couple of months ago, started to have an intermittent problem with the front. It seemed to go away without intervention.

Week or so ago, jumped in the motor, turned the key and had the pdc button flashing orange and a high pitch constant tone from the rear for a few seconds then the light just continues to flash. If I unplug the rear loom completely, problem continues exactly the same.

A kind forum member (thanks again Mark) checked the codes this morning:

* B1B57-11 (2F) Front sensors power circuit - General electrical failure - circuit short to ground

* B1B58-11 (2F) Rear sensors power circuit - General electrical failure - circuit short to ground

So still not really sure what the problem is. Could it actually be a problem with the front which is throwing out the back?

I've found posts about similar issues, but not quite what I have. Any advice would be gratefully received.

Thanks in advance,

Chris. .. still learning

)

Isofix car seat, Isofix baby seat base, crushed carpet crisps, sticky leather seats (next to Isofix car seat), upgraded front rubber cup holder things, wired up USB charge and audio for my iphone, side steps, de-tango'd lights, H7 OSRAM Nighbreakers, LED side lights, LED reverse lights, clear repeaters, Narpy Grill... tools I don't know how to use.... yet..

25th Mar 2016 7:39 pm

anglefire

Member Since: 09 Mar 2010
Location: In the Club House
Posts: 4180

Pleasure Chris and good to meet you

,

Should also add, checking the rear socket with a multimeter and all the sensor return pins were all at about 80Mohm, 0V line was just a few ohms to the nearest bolt (So not a great earth) and the 12V line was indeed 12V to the 0V pin.

Unfortunately I couldn't turn off the front PDC in the CCF as I don't have a pro IID to see if that would isolate the fault a bit better. Mark.
2006, D3 SE Auto - gone but not forgotten.
2014 BMW 530d M Sport Tourer.
1977 Triumph Spitfire 1500

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25th Mar 2016 8:59 pm

Chris1969

Member Since: 21 Jun 2011
Location: North Worcestershire (not far from Redditch)
Posts: 385

Yeah what he said

Good to meet you too

.. still learning

)

Isofix car seat, Isofix baby seat base, crushed carpet crisps, sticky leather seats (next to Isofix car seat), upgraded front rubber cup holder things, wired up USB charge and audio for my iphone, side steps, de-tango'd lights, H7 OSRAM Nighbreakers, LED side lights, LED reverse lights, clear repeaters, Narpy Grill... tools I don't know how to use.... yet..

25th Mar 2016 9:03 pm

Chris1969

Member Since: 21 Jun 2011
Location: North Worcestershire (not far from Redditch)
Posts: 385

Is there a way of checking individual sensors without them being connected to anything??

Answers on a postcard

.. still learning

)

Isofix car seat, Isofix baby seat base, crushed carpet crisps, sticky leather seats (next to Isofix car seat), upgraded front rubber cup holder things, wired up USB charge and audio for my iphone, side steps, de-tango'd lights, H7 OSRAM Nighbreakers, LED side lights, LED reverse lights, clear repeaters, Narpy Grill... tools I don't know how to use.... yet..

26th Mar 2016 5:46 pm

anglefire

Member Since: 09 Mar 2010
Location: In the Club House
Posts: 4180

I'm guessing if they are powered up they should then click - you might be able to get a signal off the 3rd wire too - but not a clue if it is PWM or DC. Mark.
2006, D3 SE Auto - gone but not forgotten.
2014 BMW 530d M Sport Tourer.
1977 Triumph Spitfire 1500

_________________________________________________
Disco Picture Website Here

26th Mar 2016 5:54 pm

Rob.M

Member Since: 09 May 2016
Location: Warrington
Posts: 85

2005 Discovery 3 TDV6 HSE Auto Bonatti Grey

Did you have any luck finding out the cause of the issue?

I've got the same fault codes and symptoms!

Cheers

25th Oct 2016 10:11 am

UtilityGuy

Member Since: 26 Mar 2016
Location: Northampton
Posts: 343

2006 Discovery 3 TDV6 HSE Auto Java Black

Ive got this issue as of since the summer heat has kicked in, my moneys on a duff sensor, but to get at them all you need to take off the rear bumper cover, so may as well order some news ones and wait till i have them all here to get stuck into this job,

20th Jun 2017 12:19 am