"Flynorcal: pilot, offshore sailor, car racer and panty thief" (flynorcal)
04/01/2016 at 03:49 • Filed to: None
0
4|
"Flynorcal: pilot, offshore sailor, car racer and panty thief" (flynorcal)
04/01/2016 at 03:49 • Filed to: None | 0
| 4 |
If I leave it alone for a while, a few hours or just a few minutes, the Comfort Access (CA) system doesn’t recognize my touch which is the magic that unlocks the doors after a quick electrical pulse to ID the key in my pocket. I can still unlock with the fob, but CA doesn’t work.
Then I get in and start the car and it bings and bongs and throws up a warning the the battery has been disconnected. This is a big deal, disconnecting the battery in an M5. Many folks will hook up a charger to the car while swapping batteries, afraid of what will happen if the battery goes away. It’s absolutely no big deal at all, it just makes the car re-adapt settings as it re-learns them. Does more good than harm I’d bet all said and done. Setting the date is the most involved part.
I figured this was a fault in the CA system. It’ll keep a car from truly “shutting down” and drain the battery if a CA switch in a door goes bad, or any other part goes bad. Failure = a short, really, and your battery dies as the computer stays awake thinking something is about to happen. This was my engineering mind reaching for a complicated answer involving the CA system and a switch inside of a door and I was contemplating disconnecting the rear door sensors and .... well let’s see what the multi-meter says....
With engine off: 11.2 volts — oh my.
With engine on (idling): 10.8 volts!!!
I haven’t fixed this problem and have only diagnosed it tonight but I am willing to bet it’s the ...
(hint: four syllables)
bob and john
> Flynorcal: pilot, offshore sailor, car racer and panty thief
04/01/2016 at 04:06 |
|
alternator
BvdV - The Dutch Engineer
> Flynorcal: pilot, offshore sailor, car racer and panty thief
04/01/2016 at 04:12 |
|
Ah your turbocharger is going out?
Apart from the joking, that sucks dude. Is there any way to reach it easily in the cramped engine bay of the M5?
|
Flynorcal: pilot, offshore sailor, car racer and panty thief
> BvdV - The Dutch Engineer
04/01/2016 at 04:31 |
|
Well played. I hadn’t realized that turbocharger would work with the hint!
And.... no. I believe it requires removing the radiator believe it or not, but I haven’t looked under the hood to confirm. The battery is in the trunk which is where I was with the multi meter and there’s the trunk light as I was in the dark with no flashlight diagnosing things.
I’m confident enough that it’s a job that requires a lot of leaky stuff that I’ve already emailed my service guy at the dealer and asked him to set aside a 435 or M235 for me to hoon the bejesus out of as a loaner while they swap the alternator. If it looks approachable to do myself I’ll cancel but I’m stuck with street parking two blocks from a police station so it’s not like jack stands in the street while draining coolant is going to work out :/
Niko's Work Account
> BvdV - The Dutch Engineer
04/01/2016 at 09:53 |
|
Is that a Stage III Turbonator?