jetmech442

Hello fellow speed-brothers!
I have a 1969 Olds 442 that is under the knife. So far I have a 6.0L LS2 , cam/headers/intake, an 6 speed, pro-touring supension...ish, and discs all around. I was in the middle of tuning the engine when it started snowing a few months ago.

So to keep me busy I started looking at seats, and instantly fell in love with the active bolsters on M5's. I've been pouring over threads on this site and other ones like e90.com, and have learned a lot of things. before I post all that I know, I wanted to run some stuff by you guys.

Research links
DIY Powered seat retrofit (WIP)

E9x KCAN 101

E60 2005 (54) 525i - Limousine Seats? - Page 2

Wiring diagrams here:
WDS BMW Wiring Diagram System - 5 E60 E61

*{ } represent the ID number in the Wiring Diagrams

So, the seat switch module {S50} has 3 wires, power, grnd and K-Bus(black wire). Kbus exits the seats via the yellow connector{X275, pin 2}. That K-bus then goes to the Centre Switch Console{A169},BMW PN 6985806. This console is the ecu for, and also has the button for heating, active backrest setting, park distance..etc. The wiring diagram shows CAN-BUS out of the console, which will feed back into the main seat controller{A187}. the main seat controller then commands seat movement/active backrest adjustments.

I guess I just first want to make sure these assumptions are correct, and that the centre switch console does indeed take K-bus and convert it over to CAN -Bus.

If this is correct, then I need to purchase that console just to get my seats to adjust. From there I will use my Arduino Uno/Can Shield to deliver vehicle speed, acceleration(lateral/yaw) and steering wheel angle to the main seat controller so that it can actively adjust bolsters.

Let me know what you guys think.

jetmech442

A Pic of the car if anyone is interested.

constant

Admittedly I have not reviewed the WDS, can't pull it up on my phone. But if the WDS says CAN-L and CAN-H lines are available at the switch console, then you are correct. KCAN there will be 100kbps. You'll be on your own to sniff the CAN IDs, I don't have that option so I'm no help.

jetmech442

Not sure how helpful this is to any of you,but I purchased the PDC console which, on the wiring diagrams is {A169}. This is the computer that has the row of switches in the center console.

This will recieve the K-bus signal form the seat switch, and translate it to CAN-Bus for the seat controller. I thought about buying one with only the PDC (for 14$) and trying to see if I could wire in a switch where the active bolster/seat heat buttons go and seeing if it still worked. But then remembered how behind I am and just bought one out of an M-car. for reference, I searched this on ebay:
BMW E60 M5 M6 HEATED SEAT PARKING DISTANCE DSC SWITCH MODULE 51457047145 OEM

After I get this wired in, I should just need to send vehicle speed, steering angle, lateral and yaw acceleration via CA-Bus to the seat controller{A187}. ANy help with CAN-ID's for those four would be a world of help.

Jcbryant6

Super cool idea!! I am not able to help because this is way beyond my experience level, but this is one of the coolest ideas on one of my favorite classic cars. Good luck!!