Member Since: 08 Sep 2020
Location: Buckley, North Wales
Posts: 1150
Rear Parking Sensor Sounder
Hi all
Back againnnnn
So I finally got round to removing the rear bumper for some work. One of the jobs being the rear parking sensors not working. I was previously told it could be a worn loom that’s a common problem.
I haven’t been able to find any visual problems. I also read the code in my new GAP IID tool and it says rear sounder.
I’ve located that under rear left window trim. And hope to find an easy fix! HOPE
Anyways I was wondering does anyone know if this is commonly a tell tale code for further problems? Or does it look like a simple fix? Surely other faults would come up if there were any beyond the beeper?
Attached code
Thanks
Disco 3 SE Manual 2005 V6 2.7
Buckley, North Wales
7th Nov 2022 9:39 pm
Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10368
Member Since: 08 Sep 2020
Location: Buckley, North Wales
Posts: 1150
Cheers I’ve got one spare from a parking sensor kitDisco 3 SE Manual 2005 V6 2.7
Buckley, North Wales
8th Nov 2022 1:38 am
SpiderBaby D3 Decade
Member Since: 21 Sep 2007
Location: Liverpool
Posts: 1399
Had issues with my rear sensors recently - Autel diagnosed the individual sensor.
However if you've taken the bumper off (and so done the hard work) I'd say it's worth doing some simple continuity tests on the loom while it's off
You can also do a simple check on the individual sensors by putting the car in reverse, release EPB and putting your ear next to each sensor in turn - you'll hear "clicking" if it's working.I see no ships........
8th Nov 2022 9:20 am
cmb2020
Member Since: 08 Sep 2020
Location: Buckley, North Wales
Posts: 1150
Cheers
So I’ve just cleared the codes, put in reverse with epb off, then walked to listen to each sensor to test
Could hear no sensors ticking. Then came and refreshed the codes to find now all 4 sensors and the sounder are giving codes
At this point I can either buy an eBay kit that fit the sensor fitting holes and basically do a separate kit…
Or I presume check the continuity of the loom plug car end?
Do you by any chance know the bumper sensor hole width? As I didn’t think to measure mine when disconnected.
Also, if I did try to save the original sensors, would you happen to know of an idiots instruction guide to using a multimeter and what to look for please?Disco 3 SE Manual 2005 V6 2.7
Buckley, North Wales
8th Nov 2022 5:24 pm
Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10368
well that's very odd.
It may have been caused by unplugging the bumper and then turning the ignition on ? So worth clearing the codes. Then select reverse again.
Did you plug the loom back in ??!!
As you have an Autel and GAP there really is no benefit to you listening to sensors. That is only for those that dont have code readers.
I think it's worth using the factory kit, try connecting a speaker up and see what happens or buy that link.
8th Nov 2022 6:34 pm
cmb2020
Member Since: 08 Sep 2020
Location: Buckley, North Wales
Posts: 1150
Yeah i cleared the codes then out in reverse again to check and got all 4 sensors and the speaker
If I were to take the bumper off again… am I right in thinking I would trace one of the sensors pair of wires to the wiring loom on the car side and then test it for 12v? And if there’s readings then test the wiring again at each sensor wire?
I’ll test the sounder tonight but I can’t see the sounder causing the sensors to flag up too
Never ends does itDisco 3 SE Manual 2005 V6 2.7
Buckley, North Wales
8th Nov 2022 8:23 pm
Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10368
So have they never worked or have they just gone wrong?
They aren’t easy to test. The only thing I know is there should be voltage between the black and brown wires. Maybe 5v.
With the gap iid you can read the live values of the 4’sensors.
So you can see 5 meters when no obstical down to 0.2 when your hand is in front of the sensor. So that’s worth playing with.
8th Nov 2022 8:35 pm
cmb2020
Member Since: 08 Sep 2020
Location: Buckley, North Wales
Posts: 1150
Ahhhhh good shout that mate nice one I’ll try that cheersDisco 3 SE Manual 2005 V6 2.7
Buckley, North Wales
8th Nov 2022 8:36 pm
SpiderBaby D3 Decade
Member Since: 21 Sep 2007
Location: Liverpool
Posts: 1399
You can buy cheap aftermarket sensors on eBay for around £18 for four.
I've used them without issue but you make your own decisions.
For a simple continuity test I simply made sure there were no breaks in any of the individual wires from plug end to plug end - again your call.I see no ships........
8th Nov 2022 9:52 pm
cmb2020
Member Since: 08 Sep 2020
Location: Buckley, North Wales
Posts: 1150
So I just checked fuse 36 which was fine
Opened the loom and blasted contact cleaner inside
Cleared codes
Put in reverse with engine off
Put live values on and got the values in attached images
Not getting any reading from any components
Very odd
Going to check black and brown wire tomorrow with multimeter and replace the sounder
Disco 3 SE Manual 2005 V6 2.7
Buckley, North Wales
9th Nov 2022 9:05 pm
cmb2020
Member Since: 08 Sep 2020
Location: Buckley, North Wales
Posts: 1150
This is what I’d like to do but I wonder will they fit the diameter of the sensor holess in the bumper??
SpiderBaby wrote:
You can buy cheap aftermarket sensors on eBay for around £18 for four.
I've used them without issue but you make your own decisions.
For a simple continuity test I simply made sure there were no breaks in any of the individual wires from plug end to plug end - again your call.
Disco 3 SE Manual 2005 V6 2.7
Buckley, North Wales
9th Nov 2022 9:07 pm
Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10368
The fault codes are probably stopping everything. You also need the park brake off. Maybe not a good idea in wales!!
If you have front sensors you aren’t going to help getting them working fitting aftermarket rear kit.
I honestly think you left the loom disconnected when you removed the bumper !!!
9th Nov 2022 10:01 pm
cmb2020
Member Since: 08 Sep 2020
Location: Buckley, North Wales
Posts: 1150
Hahha luckily I can work on the street nice n flat where I am
Though I think I did leave the epb on the second time I tested ffs haha I’ll try again tomorrow
Definitely was connected when I checked before and cleaned the connections
Will have another go tomorrow
Thanks again for the help!!!Disco 3 SE Manual 2005 V6 2.7
Buckley, North Wales
9th Nov 2022 10:09 pm
SpiderBaby D3 Decade
Member Since: 21 Sep 2007
Location: Liverpool
Posts: 1399
The aftermarket sensors I used were a straight push in replacement - no issues.
Have you still got the bumper skin off? If so, I'd do some simple tests first.I see no ships........
You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum
