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BMW 3-Series (E90 E92) Forum
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Rear PDC sensor PROBLEM after Alpine upgrade
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02-22-2012, 01:33 PM | #23 | |
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PDC sound by default is coming only from rear speakers which are even after upgrade still driven by HU directly, so believe whatever I change in amp it would affect thigs after Alpine amp eg. front speakers only. Gong which is coming from front I have no problems with BT I don't have so can not say. By the way, dealer ordered for me a new tweeter as they originally installed one with damaged membrane, will arrive end of next week. Then they will also try to solve this PDC sound problem with recoding one more time or upgrading. |
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02-28-2012, 09:47 AM | #26 |
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02-28-2012, 05:53 PM | #27 |
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And... we have a response from BMW.
Per BMW, post-03/09 build E90's DO NOT NEED TO BE CODED. So they want to 'uncode' my Alpine upgrade, removing the 676 from my VO. This will restore the volume of my BT/gongs/nav to their original value. It will also restore the EQ of the head unit. So it will then sound like crap again, but this time with supidly loud gongs (even when turned down all the way) Fannnnn-tastic. I'm not bringing it back in to get this done. I'd rather find out a way to work out some combo of settings with NCS Expert on my own, or live with it the way it is. Thanks BMW-- thank you for leaving me (and others) hanging on this one. I'll remember this when it's time to buy a new car. |
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02-28-2012, 06:13 PM | #28 |
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^ Interesting, and thanks very much for the update.
What about switching the amp jumpers...shouldn't be any more trouble than the numerous trips to the dealer you've already made : |
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02-29-2012, 10:42 AM | #30 | |
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02-29-2012, 01:13 PM | #31 |
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Still, is this problem with the low pdc/bt/gong obligatory for every Alpine retrofit or not?
I mean, there must be some 100% working solutions...? Last edited by von Schultz; 02-29-2012 at 04:34 PM.. |
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02-29-2012, 03:02 PM | #32 |
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Small update... Opened amp today. There are 8 jumpers marked with high/low, 4 visible on photo from "montr" thread and 4 more under small PCB on which switch 1-2 is.
Tried first 4 on low, sound degraded from what I can say, volume from mid and tweeter reduced and from woofers increased highly. No change on gong/pdc. Tried another 4 on low, sound also degraded and I got big noise, even when I switched off radio noise was still coming from speakers. I swapped all jumpers back where they were... In this way I get most acceptable sound but PDC volume reduced. I think I will stay this way if my dealer suggest to recode back to Stereo as solution. Will see when they call me. |
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02-29-2012, 03:04 PM | #33 |
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When I asked my dealer did they had this situation before he said they did not, even though they installed quite a few of Alpine kits.
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02-29-2012, 05:09 PM | #34 | |
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My opinion-- BMW realized they had a problem with PDC/Gong/BT/Nav after they told Dealers to code it in ISTA/P, and they revised the instructions to say that no coding was necessary. Even with the lastest update to ISTA/P, the 'Alpine Hifi' coding selection is still present -- saw it myself. |
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02-29-2012, 05:11 PM | #35 |
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And from my pre-coded but installed testing-- bass is WAY overdriven, the gongs are extremely loud (even if I turned them down in CIC), and the EQ does all sorts of horrible things to the sound.
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03-01-2012, 02:18 AM | #36 |
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I had the dealer install the Alpine kit and supposedly do the coding. My gongs are ridiculously loud and I have it turned down all the way. I find everything a bit bright - treble too high and bass too low. I am hoping to get an answer back today from the dealer as to what they did with the coding.
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03-01-2012, 07:17 AM | #37 | |
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03-01-2012, 04:17 PM | #40 |
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Let this serve as a warning to all who think about the BMW Alpine kit for your tweeter-less '10-'11ish 'Stereo'/base car-- it DOES NOT work as designed, and DO NOT install it, because it will not sound right without coding, and if you do code it, it will mess with your gong/BT/Nav/PDC volume levels.
Dammed if you do, dammed if you don't I guess... ( |
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03-01-2012, 05:10 PM | #41 | |
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Software-> Hifi, flat signal Hardware->low level input. Unfortunately, my amp is not the alpine so I can't help further, to try and figure out the jumper combo. My theory is thus.
Edit, the PDC is another issue altogether because the amplification analysis is inapplicable to the rear speakers. No matter what, the rear speakers are getting the HiFi (max 5v) voltage when they were designed for stereo (9v). Only solution for them I can think of is the UNCODED solution, but that gives you shitty EQ There is a final possibility that there are discrete variables that can be changed with NCS expert for these volume levels. I would push that back to the coding community to try and "search" for HiFi or Stereo references (or PDC) in their files, to see if any variables can be changed. |
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03-01-2012, 05:23 PM | #42 |
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Taibanl... I think you're on the right track... mostly!
I'm coded Hifi -- and I've noticed while poking around in my .trc for CIC, these little gems- VOLUME_ADJ_1 e90_hifi VOLUME_ADJ_2 e90_hifi VOLUME_ADJ_3 e90_hifi VOLUME_ADJ_4 e90_hifi VOLUME_MAXIMUM_TEL e87_hifi VOLUME_MINIMUM_NAVI e90_hifi VOLUME_MINIMUM_TM e90_hifi VOLUME_MINIMUM_TEL e90_hifi VOLUME_KLANG_1 e90_hifi KLANG_OFFSET standard VOLUME_PDC e90_hifi VOLUME_DELTA_PDC_ENTER e87_hifi My theory (aided by the scotch in my hand...) is that one or more of these values controls the volume table for the gong (KLANG ?), PDC (PDC - I got that one!), Nav (NAV ?) and Bluetooth (TEL ?). By recoding one or more of these values back to e90_stereo, I might be able to get the increased volume I'm looking for. Comments on my theory? |
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03-01-2012, 05:30 PM | #44 | |
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