Power TCU trough Ignition position -Battery Drain- Solved

[Overboost]

Fuse 74 responsible for:

• Telematics Control Unit (TCU) or Universal Electronic Charging & hands-free unit (ULF)
• Voice Input
• Eject Box
• Compensator

[racebmwm3]

Originally Posted by Overboost

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]

Originally Posted by racebmwm3

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]

Originally Posted by racebmwm3

What are these items?

Eject Box
Compensator

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

[racebmwm3]

Originally Posted by Fifty150hs

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

Originally Posted by Overboost

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]

You could have just pulled fuse 74 but removing the TCU achieves the same result identifying the TCU as the issue.