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-   -   Power TCU trough Ignition position -Battery Drain- Solved (https://xoutpost.com/bmw-sav-forums/x5-e53-forum/109457-power-tcu-trough-ignition-position-battery-drain-solved.html)

racebmwm3 04-22-2021 11:10 AM
Quote:
Originally Posted by Overboost (Post 1149153)
Fuse 74 responsible for:
  • Telematics Control Unit (TCU) or Universal Electronic Charging & hands-free unit (ULF)
  • Voice Input
  • Eject Box
  • Compensator
What are these items?

Eject Box
Compensator

Overboost 04-22-2021 11:20 AM
Quote:
Originally Posted by racebmwm3 (Post 1202959)
What are these items?

Eject Box
Compensator
I think the eject box was for handheld phone technology that existed in the early 2000's. I think it was wired for provision under the armrest. The compensator I have no idea but probably phone/TCU related.

Fifty150hs 04-22-2021 11:20 AM
Quote:
Originally Posted by racebmwm3 (Post 1202959)
What are these items?

Eject Box
Compensator
The TCU is the unit for bluetooth for phone. It is notorious for creating parasitic drain.

racebmwm3 04-22-2021 12:19 PM
Quote:
Originally Posted by Fifty150hs (Post 1202961)
The TCU is the unit for bluetooth for phone. It is notorious for creating parasitic drain.
Quote:
Originally Posted by Overboost (Post 1202960)
I think the eject box was for handheld phone technology that existed in the early 2000's. I think it was wired for provision under the armrest. The compensator I have no idea but probably phone/TCU related.
Thanks.

Yanked the TCU after charging up my dead battery..... let's see if this works...

Overboost 04-22-2021 12:32 PM
You could have just pulled fuse 74 but removing the TCU achieves the same result identifying the TCU as the issue.


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