Blind Spot Monitoring - retrofit to US cars-

  1. 17CivicTypeR_Brian

    17CivicTypeR_Brian Aiming for 400whp out of the TypeR.

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    Good morning,
    I think I've discussed this topic a bit in other threads but I think this one needs its own thread.

    For background, I think we all know the US market does not have Blind Spot Monitoring but it appears that the European market does. This is evidenced by the fact that the European Power Folding mirrors, like the ones I have (and sell), include indicators in the mirrors as part of the glass. This is not a simple retrofit from what I can tell. First, getting info like wiring diagrams from Europe has been difficult or near impossible. Next, it's challenging to get necessary parts for testing - even with my established supplier channels.
    Blind Spot Indicator (BSI or BSi for short) utilizes 1 radar unit in each of the 'corners' of the back bumper that continuously operate to monitor for presence of a vehicle. If a vehicle is present, a little light illuminates in the mirror. If you operate your turn signal and a vehicle is observed at any time, an audible beeper indicates you should double check before you make a move.
    Although the Civic is a small vehicle by US standards, it's a feature I enjoy from other vehicles-even though I rarely drive the Civic 'slow' enough to establish a blind spot.

    The best info I can get is from the US Accord and the radar-to-mirror indicator look like this-
    upload_2019-11-6_14-13-12.png

    It clearly uses CAN BUS (shown as B-CAN) to communicate with the overall car, but I wouldn't be surprised at this point if the little indicator light (JUST the light) is illuminated from the Radar unit. I see it like this-

    Pinout for both radar units in the back
    1. 12V+ Power to radar units (both L and R)
    2. 12+ Signal out to Side Mirror indicator (Same-side radar as mirror)
    3. B-CAN (+ maybe)
    4. 12V- aka Ground from Right Side Radar Unit to Left Side Radar Unit (should use common ground to help prevent signal noise/looping)
    5. B-CAN (- Maybe)
    6. 12V- Ground (From Left Side Radar Unit to Right Side Radar Unit)

    So it looks like your parts list if you want to do this retrofit-
    1. EDM Power Folding Side mirrors
    2. Left Side BSI Radar Unit from 2020 Accord Sport 2.0T
    3. Right Side BSi Radar Unit from 2020 Accord Sport 2.0T
    some lengths of wire
    A pigtail harness that fits into the radar units...or the sub-harness on the RAdar Unit side of that C130 connector-
    Some method of connecting the wires to the Power Fold Mirrors up front.

    At this point (06NOV2019) I don't know if you can put these radar units on the CAN BUS and actually have them be recognized...Will the BCM pick up the units and integrate them automatically (including the audible warning indicator?) or will you cause a communication failure on the BCM by adding devices to it? Honda Service says they have no ability to 'reprogram' the BCM through the CAN Gateway.

    I'll be happy to add to this thread as I learn more or arrive at a solution. All contributions welcome-

    Thanks for any help-
     
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  2. Mick the Quick

    Mick the Quick Senior Member

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    Interesting! I will shamelessly wait for someone richer and smarter than me to serve as a guinea pig. Hopefully, we can make it work!
     
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  3. kotarou

    kotarou Senior Member

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    Do you know which European version has this feature?
    I can try to find something abut it.
     
  4. OP
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    17CivicTypeR_Brian

    17CivicTypeR_Brian Aiming for 400whp out of the TypeR.

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    Hmm. I think maybe the Civic Type R GT in the UK. I'm not sure if continental Europe gets the same model designations, but I'd guess it's the top model. From what I could see in the Civic 1.0, it did not have the radar units - that I could find.
     
  5. xenon04

    xenon04 Senior Member

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    I have a sedan executive that has this feature
    You can see a list of versions that have it in the attachment

    Untitled-3.jpg IMG_2525.jpg
     
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    17CivicTypeR_Brian

    17CivicTypeR_Brian Aiming for 400whp out of the TypeR.

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    Awesome! Thank you for that!
    That's exactly how my mirrors look. I'm still working on getting the radar units to try out...I've located some on Ebay but they're more than I want to spend on an experiment.

    Brian
     
  7. xenon04

    xenon04 Senior Member

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    it is a visual and beep warning
    beep warning is only in situation when the turn signal is on and another car is in the lane you want to go to
    video is from system initialization
     
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    17CivicTypeR_Brian

    17CivicTypeR_Brian Aiming for 400whp out of the TypeR.

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    That helps a lot.
    I suspect the 'beep' is going to be the one part I won't be able to make work...since the radar units connect to the CANBUS, I suspect the beep emitter (dash/BCM/Gauge Cluster) won't be able to receive the signal because I don't think it will integrate and I'm scared to try and see what happens.
    The LED appears to be driven off an output from the Radar unit in the bumper-
     
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