Battery draining issue - 2014 Passat TDI

LabanM

New member
Joined
Apr 26, 2020
Location
OH
TDI
2014 Passat SEL Premium
Hey all, first time here. I purchased a 2014 Passat TDI SEL Premium back in April right after all the shutdowns, love the car but have only put 4k miles on it. Needless to say it sits a lot now with working from home and barely driving anywhere. So the reason I mention all that is back in roughly July or August my battery started draining after what seemed like 3-4 days after driving it. Though maybe I have a bad battery and had it swapped a few weeks ago. The battery was fine after replacing and not driving at all until after 10 days it was drained too low to start the car. I'm positive if I was driving the car I never would have had any issues but, something is draining the battery very slowly.
Tonight I went through TSB 27 15 03 to check for parasitic power draw and found one 5 amp fuse that's pulling 3.0 mV which equates to 198 mA which is over the 40 mA max after waiting 2 hours for full sleep.

I'm needing help finding a diagram that shows what fuse this is and what's on that circuit. If someone could point me to a diagram I would be very grateful!

Also, has anyone else experience battery issues after a lengthy time of not driving? How long does/should the battery last when not being driven?


TSB 27 15 03
 

LabanM

New member
Joined
Apr 26, 2020
Location
OH
TDI
2014 Passat SEL Premium
I found the list of what each fuse is but no image legend that shows what each fuse number is so I can correlate to the appropriate description.

Here's an image of my fuse box. The closest I could find by googling is one for a Jetta, but not sure if it's the same.

 

LabanM

New member
Joined
Apr 26, 2020
Location
OH
TDI
2014 Passat SEL Premium
Finally figured this out (Sort of) the fuse is for the bluetooth transceiver. When the fuse is connected the battery will drain in about 5-7 days if sitting idle. I have yet to figure out if the bluetooth receiver is part of the radio or a separate part. I have a bad feeling it's part of the radio. Either way, pulling the fuse out when the car is not being driven for several days prevents a dead battery.
 

pedroYUL

Veteran Member
Joined
Sep 8, 2011
Location
MI, USA
TDI
2004 Jetta wagon BEW; 2015 Passat SE CVCA; 2015 GSW CRUA
It is a module that lives inside your arm rest. Open up there, see the big MDI connector? The BT module is integrated to it, you can get it out and just unplug it from the other end.
 

VernK

Veteran Member
Joined
Jul 31, 2012
Location
Kelowna
TDI
2012 Passat 2.5L Gas
The telephone transceiver should be the box under the passenger seat.

Yours
Vern
 

06bluebeetletdi

Veteran Member
Joined
Sep 30, 2012
Location
Middlesex, NC
TDI
'14 Passat TDI SEL and '13 Beetle TDI
I have a 14 tdi sel premium as well, mine was driven once a month for a mile almost 4 years ago (summer of 2017, car turned 4 in October ‘17). No issues started fine every time. Are you leaving the car locked at all times? I’ve had issues with my beetle tdi, it ended up being a parasitic draw caused by the addition of fog lights using vw’s wiring harness and the fuse diagram not actually matching my car leading to the j519 module not going to sleep. It took awhile to drop the battery low enough to notice (7-8 months) and another 12 months to finally find the issue and rewire the fog lights into the fuse block.
 

Fixmy59bug

Veteran Member
Joined
Aug 1, 2009
Location
Henderson, NV
TDI
2015 Passat TDI SE
The telephone transceiver should be the box under the passenger seat.

Yours
Vern
On models with the MDI in the center armrest, it is built into the MDI unit.

Otherwise you are correct, it would be under the passenger seat.
 
Joined
Mar 14, 2014
Location
Southwest Missouri
TDI
2014 Passat TDI SEL Premium
If the car is not locked and the fob is left in the vehicle I heard the Kessy module draws some juice. Heard it is best to lock the car and make sure the fob is not close to the car.
 

06bluebeetletdi

Veteran Member
Joined
Sep 30, 2012
Location
Middlesex, NC
TDI
'14 Passat TDI SEL and '13 Beetle TDI
Definitely true, I knew someone who left their key in a 2015 kessy jetta. The car battery only lasted 9 months, unlocked car with key removed was about 18 months, locked car in our climate 4-5 years.
 
Top