PDC problem

Rsnail · 8th January 2019, 19:18

Hello guys, since yesterday, all of the sudden, my parking sensors stopped working, and when I first turn the engine on, switch to reverse gear, I hear a long BEEEEEEEEEEEEP sound that is a little louder than the sound that simply and shortly beeped when the system was working, at the same time, my rear view camera installed by me about 2 months ago stopped working, but the two systems aren't normaly interconnected at all, maybe a coincidence, but who knows... also, a brake bulb failed about one week ago and without me doing anything, after 2 days it started working again... the camera is also now sometimes working (5% of times) and sometimes not (95% of times). All of this happened after a long 900 miles road from Italy to Germany, with heavy rain almost all the road.. Could this be a boot water leak? What should I check?

By the way, diagnosed the PDC system with Toaf and it says following:

13 - ultrasonic sensor rear middle right
-Errors count: 50
-Open circuit
-Error present
-Sporadic error

COLVERT · 8th January 2019, 21:25

I guess with all that rain that some of the connectors have got water in them. You could, maybe, wait for them to dry out or go round and dry them yourself. A bit of searching needed .

trikey · 8th January 2019, 21:26

Check the rear harness behind the bumper for any breaks in the wiring, if water gets in the circuit it can cause the issue you mention.

T-Cut · 8th January 2019, 21:42

Look for twirls of insulating tape covering the poor wiring joins. The circuit break is likely from one of those. A proper soldered join is better and then protected with some heat shrink sleeve.

TC

Mike Noc · 8th January 2019, 21:45

Had a similar issue and found it was one of the sensors had packed up.

Rsnail · 9th January 2019, 04:58

TC, where should I look for what you've been describing?

Mike, you mean that one of the sensors was just faulty?

Rsnail · 18th January 2019, 20:11

Sensor arrived, installed, sprayed some contact spray on all the sensor connections plus on the big connector to clean the whole thing down, and still not working PROPERLY, and by this I mean, it only worked one time, after installing the new sensor and putting the bumper back up, by testing it with a friend of mine putting his hands in front of each sensors, everything worked perfectly, after jumping in the car and going for a ride, again, no senosrs, but this time, no longer the long BEEEEEP present when first switching in reverse, and also, all sensors are clicking like they normally should when listening to them. Funny thing is, made a diagnostic with Toaf, and everytime after I switch something up or even if I don't switch nothing up in the PDC section of Toaf and just save "new" settings for the PDC section in the program, sensors all start working again up until I turn the car off and start it again, to make them work again I have to save new PDC setting again with Toaf and still, the sensors only work until the car is turned off, when turning on again, nothing... Could it be the fact that the contact spray hasn't had a chance to evaporate all from the connectors and it creates a short somehwere? I'm really out of ideas now, errors reading in Toaf shows me nothing now for PDC and still no proper function...

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Mike Noc · 19th January 2019, 12:59

Mm sounds like the sensors are all working but the car doesn't see them as being fitted?

I don't use TOAF but could you have you altered the ZCS coding for the PDC whilst in there?

Rsnail · 19th January 2019, 13:12

Yes, senosrs are working all, all clicking and also tested each wire for continuity, all 100% clear, thing is, if the car is running, I have to unconnect the white connector from the pdc control box and connect it again, and the sensors work only for the specific time when the ignition was on after connecting the connectoe again, after the car is turned off, and on again, then they stop working, and start working again only after reconnecting the white connector again, it's like the car only recognizes the sensors only for the first time that they are connected to the system, and after I turn the car off, game off, they don't ever work again until I don't do the white connector trick again, and as far as I can remember, everything that I've changed with Toaf I changed again to the way it was as I'm very careful with Toaf coding because it can be dangerous... I'm left out of ideas..

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Rsnail · 19th January 2019, 22:23

Well tried more today and I switched and reswitched to normal every setting for PDC in Toaf and it only works up until I turn the car off, same as it only works after reconnecting the main pdc connector behing the bumper up until turning the car off, afterwards, turning it on again, all dead. And no errors on Toaf, the sounder is also working, things like this are making me mad

8th January 2019, 19:18	#1
Rsnail Gets stuck in Rover 75 Saloon Join Date: May 2015 Location: Essen (Oldenburg), Germany Posts: 626 Thanks: 59 Thanked 30 Times in 28 Posts	PDC problem Hello guys, since yesterday, all of the sudden, my parking sensors stopped working, and when I first turn the engine on, switch to reverse gear, I hear a long BEEEEEEEEEEEEP sound that is a little louder than the sound that simply and shortly beeped when the system was working, at the same time, my rear view camera installed by me about 2 months ago stopped working, but the two systems aren't normaly interconnected at all, maybe a coincidence, but who knows... also, a brake bulb failed about one week ago and without me doing anything, after 2 days it started working again... the camera is also now sometimes working (5% of times) and sometimes not (95% of times). All of this happened after a long 900 miles road from Italy to Germany, with heavy rain almost all the road.. Could this be a boot water leak? What should I check? By the way, diagnosed the PDC system with Toaf and it says following: 13 - ultrasonic sensor rear middle right -Errors count: 50 -Open circuit -Error present -Sporadic error

8th January 2019, 21:26	#3
trikey Premium Trader Rover 75 Join Date: Nov 2010 Location: Devon Posts: 33,777 Thanks: 8,837 Thanked 14,831 Times in 8,030 Posts	Check the rear harness behind the bumper for any breaks in the wiring, if water gets in the circuit it can cause the issue you mention. __________________ Lest we forget..

8th January 2019, 21:25	#2
COLVERT This is my second home R75 Saloon. Join Date: Feb 2009 Location: France/or Devon. Posts: 14,003 Thanks: 3,851 Thanked 2,167 Times in 1,816 Posts	I guess with all that rain that some of the connectors have got water in them. You could, maybe, wait for them to dry out or go round and dry them yourself. A bit of searching needed .

8th January 2019, 21:42	#4
T-Cut This is my second home Rover75 and Mreg Corsa. Join Date: Nov 2006 Location: Sumweer onat mote o'dust (Sagin) Posts: 21,753 Thanks: 341 Thanked 3,660 Times in 2,924 Posts	Look for twirls of insulating tape covering the poor wiring joins. The circuit break is likely from one of those. A proper soldered join is better and then protected with some heat shrink sleeve. TC

8th January 2019, 21:45	#5
Mike Noc This is my second home Rover 75 CDT Manual Connoisseur SE, Rover 75 CDT Automatic Connoisseur SE & a Freelander Td4. Join Date: Jul 2009 Location: Hampshire Posts: 11,552 Thanks: 3,470 Thanked 3,119 Times in 2,247 Posts	Had a similar issue and found it was one of the sensors had packed up.

9th January 2019, 04:58	#6
Rsnail Gets stuck in Rover 75 Saloon Join Date: May 2015 Location: Essen (Oldenburg), Germany Posts: 626 Thanks: 59 Thanked 30 Times in 28 Posts	TC, where should I look for what you've been describing? Mike, you mean that one of the sensors was just faulty?

18th January 2019, 20:11	#7
Rsnail Gets stuck in Rover 75 Saloon Join Date: May 2015 Location: Essen (Oldenburg), Germany Posts: 626 Thanks: 59 Thanked 30 Times in 28 Posts	Sensor arrived, installed, sprayed some contact spray on all the sensor connections plus on the big connector to clean the whole thing down, and still not working PROPERLY, and by this I mean, it only worked one time, after installing the new sensor and putting the bumper back up, by testing it with a friend of mine putting his hands in front of each sensors, everything worked perfectly, after jumping in the car and going for a ride, again, no senosrs, but this time, no longer the long BEEEEEP present when first switching in reverse, and also, all sensors are clicking like they normally should when listening to them. Funny thing is, made a diagnostic with Toaf, and everytime after I switch something up or even if I don't switch nothing up in the PDC section of Toaf and just save "new" settings for the PDC section in the program, sensors all start working again up until I turn the car off and start it again, to make them work again I have to save new PDC setting again with Toaf and still, the sensors only work until the car is turned off, when turning on again, nothing... Could it be the fact that the contact spray hasn't had a chance to evaporate all from the connectors and it creates a short somehwere? I'm really out of ideas now, errors reading in Toaf shows me nothing now for PDC and still no proper function... Sent from my SM-G950F using Tapatalk

19th January 2019, 12:59	#8
Mike Noc This is my second home Rover 75 CDT Manual Connoisseur SE, Rover 75 CDT Automatic Connoisseur SE & a Freelander Td4. Join Date: Jul 2009 Location: Hampshire Posts: 11,552 Thanks: 3,470 Thanked 3,119 Times in 2,247 Posts	Mm sounds like the sensors are all working but the car doesn't see them as being fitted? I don't use TOAF but could you have you altered the ZCS coding for the PDC whilst in there?

19th January 2019, 13:12	#9
Rsnail Gets stuck in Rover 75 Saloon Join Date: May 2015 Location: Essen (Oldenburg), Germany Posts: 626 Thanks: 59 Thanked 30 Times in 28 Posts	Yes, senosrs are working all, all clicking and also tested each wire for continuity, all 100% clear, thing is, if the car is running, I have to unconnect the white connector from the pdc control box and connect it again, and the sensors work only for the specific time when the ignition was on after connecting the connectoe again, after the car is turned off, and on again, then they stop working, and start working again only after reconnecting the white connector again, it's like the car only recognizes the sensors only for the first time that they are connected to the system, and after I turn the car off, game off, they don't ever work again until I don't do the white connector trick again, and as far as I can remember, everything that I've changed with Toaf I changed again to the way it was as I'm very careful with Toaf coding because it can be dangerous... I'm left out of ideas.. Sent from my SM-G950F using Tapatalk

19th January 2019, 22:23	#10
Rsnail Gets stuck in Rover 75 Saloon Join Date: May 2015 Location: Essen (Oldenburg), Germany Posts: 626 Thanks: 59 Thanked 30 Times in 28 Posts	Well tried more today and I switched and reswitched to normal every setting for PDC in Toaf and it only works up until I turn the car off, same as it only works after reconnecting the main pdc connector behing the bumper up until turning the car off, afterwards, turning it on again, all dead. And no errors on Toaf, the sounder is also working, things like this are making me mad