Porsche Macan Forum banner
1 - 6 of 6 Posts

·
Registered
2017 Macan GTS
Joined
·
2 Posts
Discussion Starter · #1 ·
2017 Porsche Macan GTS. PCM screen has been intermittent over last couple months. Most of time fix was to turn ignition off then back on but now screen is black and PCM not working.

Per owner's manual the PCM fuse should be in trunk/boot, Row E, Slot 2. See images attached. There is NO fuse in this location.
There is 30A Slot 1 and 20A Slot 3. Slot 2 has no fuse but also cannot accept one. Should be 2 female inserts where 2 male blades on fuse insert but Slot 2 is does not have 1 female insert and I looked at all other BLANK fuse slots, same way.

Does ANYONE with 2017 Macan know WHERE the fuse is to control PCM?
Online, also shows Row E, Slot 2.

Thank you
 

Attachments

·
Vendor
Joined
·
17 Posts
I can see how that's confusing. Let me clear things up.

Fuse E-3(20A) is main power for the PCM and Fuse E-4(5A) is for the display portion of the PCM, so there are technically two fuses. Fuse E-2 is only present for cars with OEM Rear Seat Entertainment.

That said, I'd be surprised if this was a fuse-related issue. Sounds like a failing component. Keep in mind that there are multiple modules and components on the MOST150 fiber-optic network, and if any one of those fail it can cause a break in the loop, which could shut down the PCM. What I'm trying to say is that your PCM shutting down could potentially be a symptom of another component in the data-loop that's failing.

Sorry it's not less complicated.
 
  • Like
Reactions: 95B3.6

·
Registered
2017 Macan GTS
Joined
·
2 Posts
Discussion Starter · #3 ·
Great information 12v Nick. Thank you. I removed and re-inserted both E-3 and E-4 and PCM display now works. In your opinion, should I take to Porsche (still has warranty) and inform them or do you think Porsche will deny because they cannot replicate?
 

·
Registered
2021 992C4S, 2020 Macan S, 2008 Touareg V8
Joined
·
530 Posts
No brainer, get it serviced asap

siberian
 
  • Like
Reactions: 95B3.6

·
Registered
Joined
·
3,543 Posts
Absolutely take it in & get it documented. Tell Porsche SA what you did to "Fix" it.

If it fails again & your fix does not work & you are past warranty....
 
  • Like
Reactions: 95B3.6
1 - 6 of 6 Posts
Top