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Thread: ACC radar adjustment on 2017 A3

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  1. #1
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    ACC radar adjustment on 2017 A3

    Anyone know the meaning of these 5 measured values in attached pic? For example, does "misalignment angle" mean the angle the ECU has measured as an offset error? The 3rd line states "performed adjustment...". Does that mean that was the adjustment made at the factory that the ECU recorded?

    I ask because my ACC stopped working. I get the yellow triangle warning symbol in the dash and I get the below error code C110300. I did a rough alignment check of the radar alignment mirror that's bonded to the radar surface (square block unit in center, front, lower grill) and I calculate the mirror to be near perfect normal to the geometric vertical plane of the car and pointing .33 degrees too high to the earth level horizontal plane. I measured the mirror to be near perfect normal to the vertical car plane. I'll post the procedure separately if it makes sense to do so - if my measured offset of .33 deg is correctable and ACC starts back up.

    13 Adaptive Cruise Control
    System description: ACC BOSCH MQB
    Software number: 5Q0907572G
    Software version: 0571
    Hardware number: 5Q0907572G
    Hardware version: H10
    ODX name: EV_ACCBOSCHVW416
    ODX version: 001005
    Long coding: D50087C219FFC428949C8055000026
    Trouble codes:
    C110300 - Adaptive cruise control sensor misadjusted
    static
    C110300 - Adaptive cruise control sensor misadjusted
    static
    U112300 - Databus error value received
    Intermittent


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    Could you please post a full autoscan - thanks.

    If the ACC has lost its alignment and needs recalibration then the dealers or a specialist ADAS garage with the kit would need to do it.

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    Quote Originally Posted by myounus View Post
    Could you please post a full autoscan - thanks.

    If the ACC has lost its alignment and needs recalibration then the dealers or a specialist ADAS garage with the kit would need to do it.
    Uh, I was not subscribed to this thread so I never go notified. Anyway, I'll post a scan tomorrow. It appears there is no calibration possible in VCDS. It provides measured values only. Is that correct? I understand that the VAS6430 aligns itself to the driving axis of the car so that the radar puck can be then aligned to the tool. This person did this... http://www.audi4ever.com/v2/blog/det...nic/index.html and I've been able to a similar alignment but with a cross-hair laser. I can post that procedure but even I adjust the radar unit perfectly to spec how do I tell the car it's aligned? And what is the spec? Normal to driving axis? I imagine horizontally it should be but vertically it might be off normal per design. There's a lot of data but no spec for it it seems.

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    Doesn't the basic setting -> Reset misadjustment angle do just that?

    You calibrate the radar to correct angle and the run that basic setting. It should take the new values as reference.

    What has happened for the radar to lose it's adjustment? Have you done something with the bumper? Lowered the car etc.? It does not lose that without being physically moved.
    There was another similar issue on different thread and there the reason was that the radar unit was knocked out from one of the fixings. OP from that thread just clicked the fixings in place and voila, misadjustment issue gone. So check those first before doing any adjustments.

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    Quote Originally Posted by downtime View Post
    Doesn't the basic setting -> Reset misadjustment angle do just that?

    You calibrate the radar to correct angle and the run that basic setting. It should take the new values as reference.

    What has happened for the radar to lose it's adjustment? Have you done something with the bumper? Lowered the car etc.? It does not lose that without being physically moved.
    There was another similar issue on different thread and there the reason was that the radar unit was knocked out from one of the fixings. OP from that thread just clicked the fixings in place and voila, misadjustment issue gone. So check those first before doing any adjustments.
    I removed the bumper and removed the radar unit from it's attachment to the bumper. The same bumper was put back on. Radar unit mounts to a pin-slot repeatable arrangement on the bumper. The bumper was installed at the same elevation (markings where bolts attach were used to verify).

    Also, I do not see anything in basic settings except checking the heating function.
    Last edited by audigroovin; 08-31-2018 at 05:07 PM.

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    Here's how it's done properly:

    The engineering problems are likely insurmountable. It would be like proposing to land a rocket booster section on a barge floating in the middle of the ocean.

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    Quote Originally Posted by Uwe View Post
    Here's how it's done properly:

    That's how Audi provides a low risk and robust procedure to get repeatable calibration results from users who purchase and are trained on that system. It is not the only way to do it "properly". ....IMO. At the risk of making an inaccurate assumption the radar mirror can be aligned orthogonaly to the geometric center of the car. If you assume the center of the mirror, the center of the front facing camera, and a 3rd point that is plumb to earth define the vertical plane of the car the mirror can be aligned to that to establish its horizontal spec. Level earth can be used to align vertically. Using a cross-hair laser I found the horizontal alignment near perfect and the vertical alignment pointing down a few tenths of a degree.

    What is the software tree required for that alignment system in the video? It's not ODIS, or is it?

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    Provided you have adjustment screws on the radar base to physically change its alignment. I just swapped the front bumper on my tiguan (which involved removing the radar unit behind the VW emblem) and it clicks into the grille without any alignment screws present (the seat of the radar is part of the grille). Aligning is done with the same setup as in the video, but purely involves changing parameters of the radar. No static alignment possible. And if I remember correctly, a radar unit that does have alignment screws to change the physical position of the radar also needs to be calibrated afterwards just like the non-adjustable units like in my tiguan. So IMO, you’re still half-assing it by only doing a static adjustment.
    Current:
    2018 Tiguan AD Highline 2.0 BiTDI 240hp > Stage 1+ 328hp
    2016 Polo 6C Highline 1.0 TSI 105hp

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    Quote Originally Posted by MasterTommy View Post
    Provided you have adjustment screws on the radar base to physically change its alignment. I just swapped the front bumper on my tiguan (which involved removing the radar unit behind the VW emblem) and it clicks into the grille without any alignment screws present (the seat of the radar is part of the grille). Aligning is done with the same setup as in the video, but purely involves changing parameters of the radar. No static alignment possible. And if I remember correctly, a radar unit that does have alignment screws to change the physical position of the radar also needs to be calibrated afterwards just like the non-adjustable units like in my tiguan. So IMO, you’re still half-assing it by only doing a static adjustment.
    My car has tip/tilt adjustment screws on the center radar unit. It is attached to the reinforcement bar, not the grill. If there are only 2 adjustment screws how am I "half-assing" it?

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    Quote Originally Posted by audigroovin View Post
    My car has tip/tilt adjustment screws on the center radar unit. It is attached to the reinforcement bar, not the grill. If there are only 2 adjustment screws how am I "half-assing" it?
    I clearly stated that if there are adjustment screws, its still only one step in the 2-part calibration proccess. The second part is what you’re completely ignoring if you only align it using the screws.
    Current:
    2018 Tiguan AD Highline 2.0 BiTDI 240hp > Stage 1+ 328hp
    2016 Polo 6C Highline 1.0 TSI 105hp

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