Hi all,
first of all, I´m a german master mechanic working kind of self employed here. Most of my customers are from a near by us military base. They drive their us spec cars here so its hard to get any good informations around here.
Also excuse me when my englisch is not perfect.

The problem here is a 2009 Maxima, its draining the battery. It drains about 200mA over an hour after closing the car.
Battery is good. I read about the alternator problem, alternator is new and even with it disconnected its draining.
The drain stops if I pull the fuse for the BCM. I looked up the wiring diagrams for the car especially everything thats connected to the BCM but i can´t find anything. All the systems are working fine. So I tried it with an used BCM. Doesnt change anything.
I spent hour of research on google an on this forum here but couldnt find something.
The Car has keyles entry and start.

Thank you very much for your attention.

 

A 2009 maxima did NOT come with remote start so you need to (unfortunately) find where they wired the after market remote start. I am guessing somewhere along the BCM power feed path, but the fun will be not only finding where they tapped in, but working with your customer to fix or remove the remote start device.
.

 

it may have something to do with the steering wheel or the drivers seat , being that they are retractable after car shuts off or something like that. there may be something prevent them to be not retracted all the way. I was having a drained battery problem like that being I had a couple pairs of shoes on my back seat driver side floor that prevented my seat to go all the way back and the motor just kept at it till battery died had to get a jump for like a week straight until I noticed that was the problem.

 

they said keyless entry and start , not remote start !