U118 no communication with BSi? [FIXED]

[ChrisRobin]

Hi
Got me a new problem now, after fixing the NG4 Nav unit with a new DVD drive all worked fine, until Tuesday last week, started up in morning and ping... EML on ? So drive to work anyway but no limp mode at all drive really well, on parking at work I noticed the front parks activated and put up image of car car on pop-up screen, but no distance bars for the bleeps but no bars, odd so I reversed up to a bank the rears work as should beeps and bars. Scanned it at work and it just showed U118 manufacturers code.
Booked it into Peugeot, they scanned it with diagbox and came up with U118 no communication with BSi - intermittent. So cleared it, told me they had no idea but total system scan should nothing and parking sensors return as no fault. Eml back on again now with U118, front parks still do not show distance bars BUT noticed something else, the 308 with the NG4 unit has within its facia a set of buttons not connected to the radio, middle one is hazard moving left you then have a locking button (working) then the front parking sensor button which does no seem to work certainly does not light up anymore when pushing it, all other buttons work fine,
To me this all seems to be venturing around the displaying of these front parking distance bars and/or the button so beginning to wonder is NG4 fully fixed as the images and distance bars seem to be shown through this unit. When it was dead none of this worked.
Anyone any thoughts on how these parking sensors work, I believe there is only one control unit for both F&R sensors but don't know how they interact with the pop-up screen. MEL only comes in at start up if it is going to come on never whilst driving and not once it has been cleared until vehicle "sleeps" and then only maybe, all very strange.

[GiveMeABreak]

'U' faults are data / communication faults.

The parking assistance sensors with front and rear option is connected to a single ECU. The parking assistance ECU connects to the BSI.

The button on the NG4 fascia I think you are referring to is the button to the right of the 'ESP OFF' button, for disabling the parking assistance (like when towing for example or with a trailer). When enabled, it should illuminate.

I know you've done some work on replacing the DVD drive and the internal drive, but has this just started to happen - as in when you completed all the mods on the NG4? Has the front parking assistance been working fine after the mods?

So it's possible that the U1118 fault has something to do with the CAN network and the info getting to the BSI. I'd make sure you have the quadlock connector in fine and all that none of the connections are loose.

[ChrisRobin]

Cheers, I will have a look at the quad although I am sure the lever clicked into place but I will double check it was a real pig to connect not much room once the fakra plugs where in mirror gets in the way of direct sight and shovel hands just got in the gap and the French have done a nice 180 twist on the cable so when it relaxed after disconnecting it ends up upside down, the button you are referring to on the right is total parking sensor off button between the ESP and call Peugeot button I also have a front only button I believe it to be between the locking button and the SOS button this she pressed when we had snow as front parks where going mad, this bank of switches has its own plug and not powered from the radio quad.
The wife did not report the "no bars" on front sensors as they go off when ever the vehicle leaves or reverses into our drive as due to the angle of drive and sharpness of the road the front sensors pick up the road surface she hasn't reported the END either which after the crank pull position sensor scare she had in her 307 she reports every problem now, I took it to work to rebalance front wheels as it has thrown a weight and I got the EML and no bars but to be truthful she tells me she doesn't look at the screen when reversing as she's using the mirrors only using the bars once on the drive and close to my car , it something you don't really think about they are well just there until they are not! Guess her car just doesn't like me!

[GiveMeABreak]

No, that middle button on the left between the SOS and the locking button is to disable the internal volumetric sensors for the alarm. There is only one parking assistance button and that is the one I described on the right.

[ChrisRobin]

Flipping heck,,,, well in doors told me she pressed that one when it was snowing as the front sensors were going nuts in slow traffic and they stopped bleeping.....
No wonder it didn't work when I pressed it at work, what a numpty, think this is an occasion were we would tell the customer RTH. (Read the handbook!)
Would you know what puts the bars on the pop-up, would it be the NG4 ? As that also shows you the roof manovre as it is happening, and when you go into reverse activated the car image, speakers make the warning bleeps, and the fronts seem to be speed controlled but I don't understand were the pop-up gets the "images" from. Just think it is rather suspicious I have no front parking bars and an EML for can comms.
I am wondering if this NG4 is more unwell than I thought it was. Although oddly it still feels for distance so not completely dead on the front although no bars don't worry us it makes you wonder if they are connected.

[GiveMeABreak]

Hard to say as the NG4 just handles the information from the various ECUs. The parking assistance ECU interprets the data from the sensors and translates this into a sound volume depending on distance. It uses the rear left or right speaker to determine the obstacle and the rear centre speaker if the obstacle is centred (where fitted for CCs).

Similarly for the front, so the head unit multifunction displays can also display this as a graph equivalent to the distance. I believe this is all handled by the parking assistance ECU.

The CAN network is crucial in conveying this data to the head units / MFDs, so if you have no bars on the front visual assistance, you may need to check the wiring from the parking assistance ECU in the rear left side of the vehicle, but that U1118 code is possible representative of the fault.

I can't provide more info without the VIN.

[ChrisRobin]

Cheers
Vin is VF3**************[VIN obfuscated, can be read by forum staff]

When I changed the DVD drive nothing inside was touched i.e circuit boards etc twas a simple job of 4 screws to remove lid which includes the player and a ribbon cable removed at DVD end, and reverse to fit it.
If I was fiddling around with the circuit boards I would understand it may cause a problem but great care was taken not to unsettle them in any way.

[GiveMeABreak]

So in this case that fault relates to a loss of communication with the engine ECU and whilst this is in play, will affect speed related functions. As the parking assistance also relies on the speed info from the engine ECU (the parking assistance will only operate at speeds of 6 MPH or lower) this may be one possibility why you are having a fault on occasion.

If is was me, I would simply reinstall the firmware again to rule this out as it can sometimes take a couple of attempts after replacing the Hard Drive / doing a conversion.
Lastly, if that makes no difference, then I would be getting the vehicle on Diagbox and checking that options are set correctly for the parking assistance.

Fault Code:	U1118
Description of Fault:	Intersystem CAN network: Loss of communication with the ECU BSI. Communication fault between ECUs detected for 3 secs. Conditions of activation of the diagnostics The following conditions have to be met: - Engine running - Ignition on
Conditions for Fault to clear:	Driving with the engine hot for 5 minutes
Downgrade Modes whilst Fault is active:	Reversible deactivation of the vehicle speed limiter, cruise control and speed curbing functions when there is an engine information fault Irreversible deactivation of the vehicle speed limiter (Need to switch the ignition off and then on, in order to make the function available again) Deactivation of the tight spot for the cruise control Reversible deactivation of the vehicle speed limiter Reversible deactivation of the vehicle cruise control Reversible deactivation of the vehicle speed limiter, cruise control and speed curbing functions when there is a transmission information fault Reversible deactivation of the vehicle speed limiter, cruise control and speed curbing functions when there is a vehicle information fault
Symptoms:	Engine hesitating, cutting out Lack of power Starting problem
Suspect Areas:	Engine ECU Intersystem network

[ChrisRobin]

Boo you can see these two sheets, this is what Peugeot have me before saying they don't know and cleared fault, be ok now!.... Well it's not.
Did have an interesting conversation with a young chap in our supermarket car park he had an RCZ with an Android head unit in, I was trying to find out if he had his old unit but alas not, binned it. But he did say something rather interesting, when he was trying to repair his old NG4 his car out on an EML doesn't remember the code but it was a manufacturer code, to cut long story short his mate an ex pug tech, borrowed a diag tester and looked through with BSi or ECO setting as in there there is something like "is the NG4 recognised" this should be yes sometimes because the head unit is slower to come on line it switches to no his mate said he didn't know why. He knew this because they once had one from Clarion which did the same, he knew what to look for straight away he said it's the only line which directly lists NG4, once he switched it to yes EML didn't come back on which I thought was interesting as it is acting the same way not on for days then on it comes as soon as engine starts but no performance loss only problem he can't remember where to find this line of "code" for want of a better description, seems to think it was either BSi, or ECU settings. You'll know it when you see it as nowhere else is NG4 directly mentioned.

[ChrisRobin]

I will see if I get them a bit more clear.

[ChrisRobin]

Anybody know were I would find (Relay) R4 to the E6 power module, seems I need to test it but I can't as I don't know were it is or what it actually does......
I seem to think the E6 power module is in the glove box, but could well be miles away.
Apparently it could be that putting on EML.
Cheers.

[ChrisRobin]

Young lad with Launch Pro sorted it, seems when the Head Unit crashed he thinks it may of slightly damaged the Config file which is why the front parking sensor bars no longer show, the U1118 was a line in the BSi config file which read something like "presence of NG4" it was at No when it should of been YES, explains why radio seemed to me to be rather quiet and flat sounding, as he said something was not responding as it should so car does not know how to handle it so puts on a light, as soon as this was changed and updated radio works full force now, No EML on since Saturday morning so all going well, sadly the front parks will stay the same now as he can't copy the config file, well say can't no point as I will just reinstall what I already have, so he has taken car details and if he gets one to re-configure he will keep the config file for mine, but like he said, a 308 with this system in not many around now they have all gone android. Not bad for a window fitter, the Dealer could not sort it.

I must say when I was looking for a used NG4 they were all RCZ's not a single 308. The wife's happy now therefore I am.

The odd thing about this was the print that Givemeabreak sent above for U118 which was nice of him but none of the symptoms were present, and the cruise and speed limiter still worked even with EML on, car drove fine, no limp, no hesitation, starts 1st time, in-depth internet searches basically came up with the same symptoms as printed above so a lot of head scratching was being done, lucky this lad turned up as I was about to book it with my BMW tech for in-depth relay 4 to power pack wiring checks, which would of resulted in nothing just wasted money, and as my tech said to think your car could of failed an MOT for a radio issue, how mad is that! we think the no comms part was possibly the NG4 although it still worked but quiet and flat and the invalid data stream was possibly the amp, just guessing at these, but once BSi was told NH4 is there all was ok, drove to him with radio on volume setting 12 and it was comfortable, drove home with it on 3 that's how different it was and now basey and rich were as before quite flat and tinny sounding, and all down to a line in the BSi config which even the Dealer did not spot @ £120 diag fee.