35d: 40mpg, try to pass, engine dies

[torqueisking]

title edit - should be 40MPH
Driving along at about 20%? throttle at ~40MPH, press the throttle to ~70%, engine dies and I coast to the side of the road. First time this has happened.

I try to restart, engine won't fire. Removed the key, try it again and it fires just fine. Drive conservatively for 45minutes with no problems. Tried to recreate the scenario and condition. Engine dies again. Drove home at light throttle with no problems.


I used INPA to read the 28 error codes stored in memory. They are all over the place. I think that’s typically battery related but I had mine fully tested a few months ago it was good as new. I cleared the codes.


Two days later, after about 20 minutes of city driving, the engine dies with ~10% throttle at ~20MPH. The second restart attempt was successful and I was able to slowly drive home.



Another error code dump found reappearing 4 errors codes.


JBBF, Junction Box - Passenger : A6D1 (Auxiliary water pump)
DDE: 4B99 (Injectors, bank 2, activation)
ZBE, idrive touch controller: A2CD (Control unit, undervoltage)
KLIMA, Heater/automatic A/C control: 9C55 (Electric auxiliary heater)


First theories are a shorted injector coil or a shorted Aux. water pump coil (it’s electric). Next step is to disconnect the Aux water pump connector and see if the engine dies while driving.

Working this vehicle can be a real PITA without a repair manual. I have TIS but only up to 2008. Hours of google searching reveals very little. There’s an online TIS but it doesn’t really provide enough information. What are the BMW techs using to repair these vehicles? Any know where I can find a wiring diagram?