Porsche Macan Forum banner

1 - 6 of 6 Posts

·
Registered
Joined
·
26 Posts
Discussion Starter #1 (Edited)
1. Why won’t a new battery register/code to the ECU?
a). It meets all requirements, e.g., AGM, AH, CCA, size, etc.
b.) It does not generate any battery faults, warnings or messages
c.) It starts, drives & all electrical options work normally
d.) It eliminated original battery issues

2. How is the ECU affected by a new battery not registered/coded to ECU?

The aftermarket battery was installed because I was far away from a dealership & it was necessary to return home.
 

·
Premium Member
Joined
·
1,014 Posts
My understanding is part of registration of the battery sets the way the system charges. By registering the battery it will last longer due to proper charging. This is most important on AGM batteries.

In your case all may be well but the life expectancy of the battery may be diminished. You do need to go to the dealer to register the battery I don’t believe any auto parts stores would have the proper tool to do this.
 

·
Premium Member
Joined
·
1,014 Posts
@notmac1 The battery has to talk to PIWIS. It needs to know who made it, serial number, capacity, etc to change its maps so it charges correctly.
Correct that’s what I stated regarding the charging. I never seem to remember the tool PIWIS so didn’t mention it by it’s nomenclature.
 

·
Super Moderator
Joined
·
7,006 Posts
Correct that’s what I stated regarding the charging. I never seem to remember the tool PIWIS so didn’t mention it by it’s nomenclature.

@notmac1, I'm sorry, I typed too fast and cut my sentence off.

The correct sentence was @notmac1 is correct. The battery has to talk to PIWIS. It needs to know who made it, serial number, capacity, etc to change its maps so it charges correctly."

I wasn't addressing you. I was saying you were correct. My bad for my head getting ahead of my fingers.
 

·
Registered
Joined
·
4,248 Posts
OP, I think this will interest you.


The need to "register" or "code" a new battery is not unique to Porsche. Had to do it on my 9 year old X5 when replacing the battery.

As you can see in the video, you do not have to go to the dealer for this, but unfortunately the Autel unit shown in the video costs about $1000. I would think any indy European specialist would have the tool needed, and I would expect them to do it for something like $50 given that it takes about 10 minutes.

Also, if I recall correctly another forum member posted that some of the much less expensive Autel models have the capability.

There has been considerable discussion on this in the past that you should be able to find using the Search feature.
 
1 - 6 of 6 Posts
About this Discussion
5 Replies
4 Participants
Shark
Porsche Macan Forum
Thank you for your interest in MacanForum.com. We’re a forum community dedicated to Porsche Macan SUV owners & enthusiasts. Come join the discussion about upgrades, specs, reliability, and more!
Full Forum Listing
Top