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Do-It-Yourself H.Q.
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  #1  
Old 05-23-2015, 07:00 AM
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Rsnic Rsnic is online now
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Side View Mirrors

Hi,

My car came standard with S431A & S430A. auto dimming/anti-dazzle mirrors; both side view and center rear view mirrors dimmed when bright light came into the mirror. I recently changed my car's side view mirrors to European, aspherical, glass. They are absolutely terrific in greatly reducing blind spots.

The auto dim feature, however, was not working on the side view mirrors; checked all connections and they were fine. The supplier of the mirror has assured me that they were tested and worked before they sent them to me. Had dealer run tests and he found no errors and suggested that there might be some coding to let the car know that there is a different mirror. I scoured FEM and found 3110 ASP_ELEKTROCHROM_SPIEGELGLAS and with my Rusty German and, of course, Google Translate, found this to be Electrochromic mirror glass -- BUT this is already set to aktiv (BTW, the similar coding item for rear view mirror is also set to aktiv).

Interestingly, I finally got around to doing another basic troubleshooting step; I took the European aspherical mirrors off and reinstalled OEM mirrors; while the rear view mirror dims with direct light on it (from either flashlight or headlights from another car), the side view mirrors do not dim. I put flashlight on rear view and even side view mirror; drove around at night -- no joy (rear view dimmed, but not side view).

Is there something that provides the electrical charge that is shorted out? Is there a fuse for the side view mirror auto-dim/anti-dazzle feature?

Does anyone have a wiring diagram for the side view mirrors?

Any ideas?
Thank you very much

Appreciate any help
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2014 328i |Premium| Technology| Cold Weather| Harmon Kardon Stereo| Manual|
Mods: Rear deck spoiler| DRL, Amber Rear turn signals & Back-up LEDs| Rear & Side view cameras| Front & Rear PDCs| Addional interior pearl gloss chrome trim
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  #2  
Old 05-23-2015, 09:53 PM
lovemy840ci lovemy840ci is offline
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I don't know everything, but i believe disconnecting the battery first would have prevented that from happening. I had a similar problem with a different car in the past.
I hope someone here can offer a professional solution but it sounds like something shorted out when the old were removed.
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  #3  
Old 05-26-2015, 01:49 AM
riku2 riku2 is offline
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do you have rheingold software? there are settings in there to force the mirrors to dim for a few seconds. in this way you can test things more precisely than shining a torch on the sensor. it will also read out any fault codes that the control units detect.

I have the dimming mirrors but there is only a three pin connection from the car body into the camera. 0v, 12v and data bus. So if the mirror moves with motor power then these three connections are ok. there can't be a separate fuse for the dimming since there is no separate wire for it. The mirror has all kinds of functions - motor to move the mirror, motor to fold in the mirror, heating, dimming, lane change warning triangle. all this is going through just the three wires: 0v, 12v and data bus.
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Old 05-26-2015, 05:46 AM
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Quote:
Originally Posted by riku2 View Post
do you have rheingold software? there are settings in there to force the mirrors to dim for a few seconds. in this way you can test things more precisely than shining a torch on the sensor. it will also read out any fault codes that the control units detect.

I have the dimming mirrors but there is only a three pin connection from the car body into the camera. 0v, 12v and data bus. So if the mirror moves with motor power then these three connections are ok. there can't be a separate fuse for the dimming since there is no separate wire for it. The mirror has all kinds of functions - motor to move the mirror, motor to fold in the mirror, heating, dimming, lane change warning triangle. all this is going through just the three wires: 0v, 12v and data bus.
Riku2,

Thank you for your response. Unfortunately, I do not have rheingold software. I did, however, have our local BMW dealer check it out and his testing yielded no problems. Indeed, there are three wires that connect to the mirrors; two connect via slip on prongs and one has a small plastic snap on connector

An update. Subsequently, this weekend, after re-installing the original OEM (non-aspherical) mirrors, we were returning on a stretch of dark highway; as cars approached from the rear, rear view mirror dimmed nicely and the side side view mirrors dimmed a few times, albeit after a relatively long delay.

So I am at a loss as to what is going on?
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2014 328i |Premium| Technology| Cold Weather| Harmon Kardon Stereo| Manual|
Mods: Rear deck spoiler| DRL, Amber Rear turn signals & Back-up LEDs| Rear & Side view cameras| Front & Rear PDCs| Addional interior pearl gloss chrome trim
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  #5  
Old 05-26-2015, 06:26 AM
riku2 riku2 is offline
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by three wires from car to mirror I meant in the connector between the whole mirror assembly and the door. there is a round blue connector and within it a connector with three cables and (for my car) a four way round metal connector for the camera. but it's the three cables that handle the motor/heating/dimming.
Are you sure your mirrors from europe are the dimming kind? they do have the line running around them about 5mm from the edge?
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Old 05-26-2015, 06:43 AM
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Oops, sorry -- understand what you are getting at. The aspherical mirrors do have a line in a little from their edge.
Would like to better understand how these mirrors are connected -- like a wiring diagram
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2014 328i |Premium| Technology| Cold Weather| Harmon Kardon Stereo| Manual|
Mods: Rear deck spoiler| DRL, Amber Rear turn signals & Back-up LEDs| Rear & Side view cameras| Front & Rear PDCs| Addional interior pearl gloss chrome trim
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  #7  
Old 05-26-2015, 07:53 AM
riku2 riku2 is offline
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The diagram doesn't help you much. A29 is the driver side mirror. S35 is the control panel in the drivers door.
There are three connections from the car to the mirror. 0v, 12v and LIN bus.
It's the control module in the mirror (marked uC) which sends 12v to the appropriate places (motors, heating, dimmer). There is not a separate cable from the car to the mirror just for the dimming.
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  #8  
Old 05-27-2015, 08:27 AM
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Riku2,

First off, thank you very much for providing!

Is it possible to provide any additional diagrams that follow the wires back to power distribution/fuze box?

BTW, with original OEM mirrors, the auto-dim works sporadically for the side view mirrors

Again, appreciate your help!
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2014 328i |Premium| Technology| Cold Weather| Harmon Kardon Stereo| Manual|
Mods: Rear deck spoiler| DRL, Amber Rear turn signals & Back-up LEDs| Rear & Side view cameras| Front & Rear PDCs| Addional interior pearl gloss chrome trim
BMW CCA
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