[RocketBoots]

If you have an aftermarket amp, like a Match, with all the correct harnesses/adapters, and the Technic ASD Bypass Harness, will this hinder or interfere with a BMW software update?

I'm wondering if I have to put the factory stuff back for a software update. I'm hoping not, since the audio system is all analog.

Thanks!

[GregoryK]

Originally Posted by RocketBoots

If you have an aftermarket amp, like a Match, with all the correct harnesses/adapters, and the Technic ASD Bypass Harness, will this hinder or interfere with a BMW software update?

I'm wondering if I have to put the factory stuff back for a software update. I'm hoping not, since the audio system is all analog.

Thanks!

The Technics bypass harness bypasses the speaker connections but keeps the module "alive". The Canbus will look for the amp but won't find so the software update will fail. Yes you should plug in your old amp before they attempt a software update.

[Viffermike]

Originally Posted by GregoryK

The Canbus will look for the amp but won't find so the software update will fail. Yes you should plug in your old amp before they attempt a software update.

Correct advice here. It's deep in the subforum, but this thread documents what happens when an ECU update is attempted when an aftermarket amp is hooked up.

This is one reason why, when I installed my own aftermarket amp, I did it while keeping the OEM one bolted in (but not hooked up). Here's my install thread.

[GregoryK]

Originally Posted by Viffermike

Correct advice here. It's deep in the subforum, but this thread documents what happens when an ECU update is attempted when an aftermarket amp is hooked up.

This is one reason why, when I installed my own aftermarket amp, I did it while keeping the OEM one bolted in (but not hooked up). Here's my install thread.

Viffer. Couple or 3 years ago I did an aftermarket amp install on my MINI JCW. Same HK system. I kept the HK amp powered with the canbus wire running to it . No sound in or out. This way the amp was not used but showed up during updates.

[RocketBoots]

Thanks guys. I thought I remembered reading somewhere it was problematic when updating software. I was hoping my memory was going bad