Battery Drain? - Page 11

Fifty150hs · #1 09-02-2021, 11:56 PM

Quote:

Originally Posted by Purplecty

My 02 does not have a TCU or factory Bluetooth.

That leaves the FSU as the likely culprit as Andrew suggested.

andrewwynn · #2 09-02-2021, 11:01 PM

Usually the FSU.

Purplecty · #3 09-02-2021, 11:06 PM

Quote:

Originally Posted by andrewwynn

Usually the FSU.

FSU as in blower motor resistor?

andrewwynn · #4 09-03-2021, 01:06 AM

Quote:

Originally Posted by Purplecty

FSU as in blower motor resistor?

Haven't seen a blower resistor since the 80s but the 21st century equivalent yep. FSU stands for final stage unit. It controls the power to the blower.

It gets power all the time so when it fails it can pull power always. More often than not, it will still function ok it just never shuts off.

Purplecty · #5 09-03-2021, 07:21 AM

Whuch fuse powers the FSU so I can pull it while its in the garage and see if it goes to sleep?

andrewwynn · #6 09-03-2021, 07:42 AM

Look for "blower" or "heater blower" on the fuse diagram.

Three are a handful of different layouts so you have to look on yours in the glove box.

Did your light used to go off? Some don't. Wife's old build date 07/2000 the parking light was always lit.

Coincidentally also had the FSU problem on that car the picky symptom was dead battery over a day or two. Blower still worked all speeds.

Purplecty · #7 09-03-2021, 08:27 AM

My light did go off after 16 min previously along with the climate control fan. I sat in the car last night for over 20min and I could still see the shifter light lit and the climate control fan still lightly buzzing. Came out this AM and the light was still lit as well. I will find and pull the FSU fuse and see if it will goto sleep after.

Clavurion · #8 09-03-2021, 08:30 AM

FSU has no bus connection and can't directly cause any sleep mode problems.

Purplecty · #9 09-03-2021, 08:31 AM

Quote:

Originally Posted by Clavurion

FSU has no bus connection and can't directly cause any sleep mode problems.

I used the X to drop my wife off at work and now the shifter light is off after 16+ min WTF?!? I think she was jealous of dailying the e38?

X5chemist · #10 09-03-2021, 11:40 AM

Quote:

Originally Posted by Clavurion

FSU has no bus connection and can't directly cause any sleep mode problems.

Can you provide a list of CAN BUS connections or items? I've eliminated the most common. Mine still has a sleep problem. It started after the Feb Texas winter storm. As soon as I can put the X5 off driving duties for a short term, the GENIII module is coming out. I'm having it checked.