[Sandyman]

I've got an 03/2007 120D face lift model and when I bought it the parking sensors never worked. Recently I pulled out my module from the classic well of water and it was basically gone. According to real.oem there are a few part nos for pdc modules that should fit (also unsure if I'm correct on that) so managed to find one albeit with a different part no. from ASM salvage as it was quite a bit cheaper than EBay. Sadly it's not working and I get the parking sensor warning on dash and light flashing on button under the radio. Would it be possible to code in or is there no other option but to get a module whose number exactly matches what was in there before? Cheers

 

[Nyxeris]

There are hardware differences inside the modules so no amount of coding will fix it I'm afraid.

If you look on RealOEM it has 3-4 options listed with a different part number. You need the module that matches your car exactly - so correct version of radio/nav, and correct sensor setup (rear/front & rear).

A correctly specced unit will be functionally plug and play, in an ideal world it should be coded, but that isn't strictly necessary.

 

[Jack79]

Only importend thing is from where did you get sound. If from soeaker you can buy every module. Eventualy coding will be needed. If you got sound from buzzer you must buy oroper one. Buzzer is when you have Business radio or no radio. This what i found out.

If you have to buy new module it is importend to by proper one for cars that got sound from buzzer ( Bussines radio). If you have sound from speakers all module will work. You can see what module you need looking on majnboard of PDC. If you got elements marked in circle you need buzzer version. If not you can buy whatever you want. On left picture buzzer version.

https://ibb.co/y8WDWMv

Only last seven digits of PN are importend.
Version working with buzzers and speaker front/rear:
6973116
6982389
6974022
6969282
6947797
6982397
6982393
6982401
Version working ONLY with speaker front/rear:
6982403
6982392
6973117
6974023
6982388
9225824
6982396
6969283
6947798
9252638
Version working with buzzers and speaker rear:
6982395
6973114
6947795
6982391
6982387
6974020
6969280
6982400
Version working ONLY with speaker rear:
6947796
6982394
6969281
6982402
6973115
6974021
9225825
6982386
6982390
9252639
If you buy bad PDC for buzzer you got errors when diagnose PDC and no sound
9E3C, 9E28 - when you got only rear PDC
9E3D, 9E28 - when you got front and rear PDC

 

[Sandyman]

Thanks guys that's very helpful! The one I bought differed only in the final digit but I can see from the table that it's in the wrong category. I can't see a buzzer where it's supposed to be so together with a professional stereo it needs to be exactly the same number : 6982396 and I guess will use the car speakers.
What made it more confusing in my case was that when I bought the car it had a business radio which I soon discovered was not the original spec, at least from what my vin said. So I bought a professional radio and suddenly the BT started working (though I can only hear the other person at present because I think the mic either broken or not present). Next I need to get the USB and aux working...one step at a time!

 

[Sandyman]

So the new unit has arrived and I've fitted it but still nothing 🙁. I'm getting the warning light in the dash and flashing led on the button. I'm really confused now because it should work, according to the info Jack79 has kindly provided. I'm now thinking it may need coding...if so how is it done using ncs expert? It's not the exact part number according to realoem (which is 925263 but it does say it's interchangeable with what I bought. All I can think is that the original must've been swapped out at some point in the past.
I'm also slightly concerned about what I wrote in my last post about the fact that the car was meant to have a prof hu from factory but mine had business. I then bought a pro one (with BT) and put it in and it works OK, including BT...just there's no mic in the light console and my USB/AUX don't work. The new stereo wasn't coded in- could this be connected to the pdc not working? If any of the sensors weren't working would it throw up a fault on the dash? Need some help please asap in case need to return the module! Thanks everyone

 

[Jack79]

You should code PDC and RAD module to deafault using NCSEXPERT, but first can you read errors from PDC module ising INPA or ISTA or on phone bimmer-tool LITE free or CARLY or bimmerLink. Do not use universial diagnose unit. Write code here.

 

[Sandyman]

Ok will read errors with ISTA and post back. So you think it can be coded and don't need to send it back?
Thanks

 

[Jack79]

You got strange situation, cause you do not have original radio and pdc more safe would be buying pdc for stereo and buzzer, cause that one works with every car, as i know. But you can try coding pdc that you bought. If it will not work you can sent it back.

 

[Sandyman]

Thanks- I did a test with both INPA and ISTA and they show basically the same error codes for PDC

CAS --- 0x00A0B3 CAS: Starter motor, terminal 50 248472 No ---
CAS --- 0x00A126 CAS: Implausible signal from engine management 247088 No ---
D71N47A0 --- 0x004000 DDE: Fuel-temperature sensor, signal 248720 Yes ---
D71N47A0 --- 0x00493F DDE: Presupply-pressure sensor, signal 248712 No ---
D71N47A0 --- 0x004B1C DDE: Fuel-filter heating, activation 248560 No ---
DSC_87 --- 0x005DF4 DSC: Battery voltage too low; open circuit 248184 No ---
DWA_E65 --- 0x00D947 DWA: K-CAN communication fault 0 Yes ---
FRM_70 --- 0x00A8C1 FRM: Reversing light, left, faulty 248264 No ---
FRM_70 --- 0x00E598 Message (driving light) missing, receiver FRM, transmitter RLS 248696 No ---
IHKA87 --- 0x00E723 Message error (status condensation window glass front, 0x2D1), receiver integrated automatic heating / air conditioning system, transmitter roof function centre 248696 No ---
JBBF70 --- 0x00A6CD JBE: Rear-window wiper blocked 248616 No ---
KOMB87 --- 0x00A559 Instrument cluster: Power supply has been switched off (closed-circuit current cutoff relay) 247096 No ---
MRS5 --- 0x0093D2 MRS: Telltale lamp for front passenger airbag deactivation 248696 No ---
PDC_87 --- 0x009E33 PDC: Lines, rear left, ultrasonic sensor 236608 No ---
PDC_87 --- 0x009E36 PDC: Lines, rear middle right, ultrasonic sensor 0 Yes ---
RAD2 --- 0x00C56D Connection, headunit to microphone: Open circuit --- Unknown

The car has a sensor missing in the rear bumper- I don't know whether it's fallen out completely or it's been pushed in and hiding behind the bumper. Is it true that if one sensor is not working then it'll throw up the error code on the dash and the module won't work at all? In which case if I buy and fit the new sensor then the parking control should function ok?

 

[Sandyman]

I erased the error codes and now I just get two: is it just a case of replacing the sensor (as I said above) and all should then be ok?

 

[Jack79]

Yeap. Install sensor and should be ok. You can make test with INPA or ISTA of PDC, after inserting sensor.

 

[Sandyman]

ok thanks will get sensor

 

[Sandyman]

Took the bumper off to see what was going on and looked at the sensor that came up in the error message. The other three click but this one doesn't, so see if the sensor was at fault I swapped it for another of the good ones and it worked! So it's not the sensor that's at fault but there's obviously no current going to the connector itself- that's my conclusion. Where do I go from here?

 

[Sandyman]

How do I check the signal to the connector? I've got a multimeter- which 2 of the pins do I put it across? What voltage am I checking for? If none is it a case of a break in one (or more) of the 3 wires?

 

[Jack79]

Check conectoion to PDC module by multimeter. The wire is going straight to module.

 

[Jack79]

Set mulimeter on beep function. Plus to one cable in sensor plug minus to plug in module and milimeter should beep. If not wire is broken
Rear center right
Pin1 sensor - yellow with black stripe goes to pin 15 in module
Pin2 sensor - brown with blue stripe goes to pin 3 in module
Pin3 sensor - green with gray stripe goes to pin 6 in module
Rear srnsor plug is in the middle of pdc module

 

[Sandyman]

Any idea which connector on the module? The middle one is power right? So one of the other two is for the rear sensors. How do I check it at the module exactly?

 

[Sandyman]

Am I checking continuity from sensor connector to module for each of the 3 wires?

 

[Jack79]

Am I checking continuity from sensor connector to module for each of the 3 wires?

Yes. I have picture, of wiring but inserting picture here is painin the a..

 

[Sandyman]

Success! I tested each of the 3 pins and each time connected the other terminal to each of the 18 pins on the connector that hooks on to the pdc module. It was trial and error really but I used a "good" sensor connector to test what I should read. Turns out I wasn't getting any continuity from pin 3 (pin one was ok)...so the only option was to investigate whether there was a break in the wire somewhere...and it seemed I was going to have my work cut out trying to find the problem in the loom from sensor to module!! I started by taking off the black insulating tape from the first part of the wires but tbh I kind of knew it would be ok because there wasn't any rubbing on that part of the loom. Then I happened to look at the part leading to the module and saw that the wire had been cut!! Crazy why someone would do that!! It was a clean cut as well...no evidence of any rubbing. So joined it up again and I now have working parking sensors front and rear! Really chuffed with myself ) Thanks to all for their help.