Welcome to the ultimate open knowledge base for the PQ electrical system.
Join in and share your knowledge!
What's meant by "PQ"?
The PQ (Plattform Quer = platform for transverse installed engines) is also the name for a standardized electrical system which is used in various VW, Audi, Skoda and Seat vehicles. When speaking of "PQ", this wiki refers only to the following PQ systems:
- PQ 25
- PQ 35
- PQ 36
- PQ 46
- PQ 47
The following systems are not compatible to the above and are therefor not dealt with in this wiki:
- PQ 24
- PQ 26
- PQ 31
- PQ 32
- PQ 33
- PQ 34
How is this Wiki structured?
It's easy, once you got the (simple) concept: Electrical systems and the applications for which they were designed can be described by seperating them into:
Control units are usually some kind of a box with a connector and software running on it. In this wiki, only control units which are connected to a bus (CAN, K-Line, LIN, etc.) are considered.
Features perform some kind of noticeable action, some are triggered by the driver (f.e. by pushing a certain button) and are usually mentioned in the car's user manual. They're hosted on a control unit.
Functions also perform actions, but they can't be controlled by the driver (they work autonomously). They're usually not of relevance to the driver, remain hidden and are not mentioned in the car's user manual. They're hosted on a control unit.
Control units (or more specific: the features and functions hosted on them) communicate via one or more busses with other control units. An example: Let's say the control unit "front radar" hosts the features "ACC" and "Front Assist" . While both feature run on the Front radar, they still require the interaction with other control units: The ACC needs to tell the engine electronics to accelerate, the brake electronics to brake, etc. But furthermore, the front radar in our example also uses a function called "component protection" (a theft protection measure), which is not noticeable by the driver - and it's existance usually only known to professionals.
Important!
All contributions were written voluntarily and free of charge by a range of authors. No contribution therefore claims to be correct or complete. Modifying or retrofitting of car electrics using the information on this page must therefore be done at your own risk!
Supported car models
The following car models use the PQ electrical system:
| Model | Model years | PQ system | Derivat | Sales Type | Notes |
| Audi A1 | 2011 - 2018 | PQ 25 | 8X | ||
| Audi A3 Mk2 | PQ 35 | 8P | |||
| Audi TT Mk2 | 2007 - 2014 | PQ 35 | 8J | ||
| Audi Q3 | PQ 35 | 8U | |||
| Seat Alhambra Mk2 | 2011 - present | PQ 46 | 7N | ||
| Seat Altea | PQ 35 | 5P1 | |||
| Seat Altea XL | PQ 35 | 5P5 | |||
| Seat Altea Freetrack | PQ 35 | 5P8 | |||
| Seat Ibiza Mk4 | 2008 - 2017 | PQ 25 | 6J | ||
| Seat León Mk2 | PQ 35 | 1P | |||
| Seat Toledo Mk3 | PQ 35 | 5P2 | |||
| Seat Toledo Mk4 | PQ 25 | ||||
| Škoda Octavia Mk2 | PQ 35 | 1Z | |||
| Škoda Rapid | 2011 - present | PQ 25 | NA | ||
| Škoda Superb Mk2 | 2008 - 2015 | PQ 35 | 3T | ||
| Škoda Yeti | PQ 35 | 5L | |||
| VW Ameo | 2016 - 2020 | PQ 25 | |||
| VW Beetle | PQ 35 | 16 | |||
| VW Beetle Cabrio | PQ 35 | ||||
| VW Caddy | PQ 35 | 2K | |||
| VW Eos | PQ 35 | 1F | |||
| VW Golf MK5 | PQ 35 | 1K (?) | |||
| VW Golf Mk6 | PQ 35 | 5K | |||
| VW Cabrio Mk6 | PQ 35 | ||||
| VW Golf Plus | PQ 35 | 5M | |||
| VW Golf Sportswagen Mk5 | PQ 35 | ||||
| VW Golf Sportswagen Mk6 | PQ 35 | ||||
| VW Jetta Mk5 | PQ 35 | 1K (?) | |||
| VW Jetta Mk6 | PQ 35 | 1K (?) | |||
| VW Passat B6 | PQ 46 | ||||
| VW Passat B7 | PQ 47 | ||||
| VW Passat CC | PQ 46 | ||||
| VW Polo Mk5 | 2009 - ?? | PQ 25 | 6R, 61 (??) | ||
| VW Sagitar | PQ 35 | ||||
| VW Scirocco Mk3 | PQ 35 | 13 | |||
| VW Sharan Mk2 | 2011 - ?? | PQ 46 | |||
| VW Tiguan | PQ 35 | 5N | |||
| VW Transporter T5.2/T6 | 2010-2019 | PQ 25 | |||
| VW Touran Mk1 | PQ 35 | 1T | |||
| VW UP | PQ25 | ||||
| VW Vento | 2010 - present | PQ 25 | 60 |
ToDo
While fully functional, this wiki is still pretty new and will have some adjustments done to improve it. Feel free to add ideas and wishes to the list!
- Show "Latest changed articles" in the main menu, to show that the wiki is in use and alive
- Show the "creator" of articles in the articles and allow upvoting.
- Adjust colors, logo and layout
- Optional: Make the menus on the left expanded by default.
- Add all pages (complete list), mark the empty ones (red or something). Also show diagnosis addresses in menu/show diagnosis addresses in header of control units pages, and optionally what functions they use.
- Remove useless "Page actions" dropdown menu on the right top in wiki pages
- Make Image upload dialogue simpler
- Change Captcha into red, to make it more clear.