RETROFIT : BMW E91 - Rear view mirror Electrochromatic (EC)

Yet another simple DIY on how to retrofit the Electrochromatic rear view mirror :)

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There is a lot of cool features related with rear view mirrors:
- alarm system
- integrated universal remote control
- interior/outside mirror auto dip
- digital compass
- rain sensor
- high beam assistant

Here, I'm retrofitting rear view mirror with autodip function. It is a must if you retrofit outside mirror with auto dip because they use sensor from interior mirror.
FZD is the module which evaluates data from interior rear view mirror (data from mirror is converted and transmitted to FRM via K-CAM, FRM dips the ouside mirrors.

Here is the part list you'll need:
 - electrochromatic rearview mirror
 - connector X14292
 - wire and 11 bushing contacts 0005197 
 - flat connector (ground)

Installation

Connection to the FZD is necessary for EC rear view mirror to work and we need X14292 connector at the mirror side. Pins that are being used are: 1, 3, 4, 5, 8 and 10.

The cable is quite short and you will need five wires that leads to the FZD. Sixth wire from the mirror is going to the ground point X10012 (left hand drive):

I've been using bushing contacts from junkyard so, as you can see, there is a soldering point on the cable. The pins that are

Bushing contacts is numbered as 0005197. You will need six (6) for the X14292 connector and five (5) for the X14288 connector at the FZD:

For the ground connection we should route the wire to the X10012 junction point located at the passenger side:

There are four connectors at the FZD:

Number	X-pin, colour	Description
X14286	14-pin, black	Component connector Function control centre, roof
X14287	4-pin, black	Component connector Function control centre, roof
X14288	20-pin, black	Component connector Function control centre, roof
X14289	20-pin, natural	Component connector Function control centre, roof

X14288 is the one we need:

Here is the pinout of X14288 connector:

Pin	Type	Description / Signal type	Connection / Measuring notes
1		Not used
2		Not used
3		Not used
4		Not used
5		Not used
6	A/E	Signal, LIN bus	Rain/headlight sensor
7	M	Ground	Rain/headlight sensor
8	A	Terminal 30	Rain/headlight sensor
9	M	Ground Condensation sensor	Condensation sensor
10	A	Supply, condensation (fogging) sensor	Condensation sensor
11	E	Signal, condensation (fogging) sensor	Condensation sensor
12		Not used
13	A	Signal, LED for antitheft alarm system	Electrochromic interior rear view mirror
14	A	Signal, electrochromic interior rear-view mirror	Electrochromic interior rear view mirror
15	A	Signal, electrochromic interior rear-view mirror	Electrochromic interior rear view mirror
16	A	Signal, electrochromic interior rear-view mirror	Electrochromic interior rear view mirror
17		Not used
18		Not used
19	A	Terminal 30	Electrochromic interior rear view mirror
20	A	Terminal 15	Electrochromic interior rear view mirror

Coding

As for the coding, everything you need to do is to make FZD aware of EC rear view mirror by changing the following option in FZD module:


EC_SPIEGEL
    nicht_activ     ==>    aktiv