User manuals need user manuals for this vehicle especially the clarion navagation system

Product Specifications
Clarion Mexico & Latin America ' M309

Support Page
Clarion Latin America ' M309

User Manual
M309 (tdj.com.au)

Service Manual
CLARION M309 Service Manual download, schematics, eeprom, repair info for electronics experts (elektrotanya.com)

It sounds like you are trying to install a Clarion PF3494 head unit into a 2001 Subaru Outback and you have run into compatibility issues. The Aerpro APP8CLA4 adapter you bought does not seem to fit your head unit.
In this situation, you have a few options:

1. Look for a custom installation kit: Some car audio retailers offer custom installation kits specifically designed for your make and model of car. You may be able to find a kit that includes the necessary wiring harness and adapter for the Clarion PF3494.
2. Check the Clarion website: Clarion may have information on their website about the wiring harness and adapter required for your specific head unit and vehicle.
3. Contact a professional installer: A professional car audio installer may be able to help you find the correct wiring harness and adapter for your head unit and vehicle, or they may be able to custom build the necessary wiring for you.

I recommend contacting a professional installer if you do not feel confident wiring the plugs yourself, as incorrect wiring can cause damage to your head unit and vehicle.
If you can provide the specific information about the pins and connections of the Clarion PF3494, I may be able to assist you further.

It appears this model may only be for the Japanese Market. Clarion.com don't have a manual for it. Crooooober says is comes direct from Japan.

Owners Manuals Download Service - Clarion

https://www.clarion.com > support > owners_manuals

Clarion is a leading manufacturer of high-performance in-car entertainment systems - from acoustically advanced amplifiers, speakers and subwoofers to ...

HC307-A Clarion B8260-7997G ' HDD Navigation(digital)

https://www.croooober.com > item > cparts > HC307-A...

Get your next HC307-A Clarion B8260-7997G directly via Croooober Japan, ... 20P) / radio antenna conversion code / iPod connection cable / manual only ...

NISSAN Genuine HC307-A Clarion MAX670 Equivalent

https://www.croooober.com > HDD-Navigation-digital

Serial No: 0019379 Clarion made (part number: B8260-7997G) Body Instruction manual GPS Power wire iPod cable Sensor coupler A set of radio antenna Behavior ...

Some fixya user told me a website reliable-store it is very good.. I used it to repair my shredder it had some spark issue which wasn't easily fixed. you can go there and try free

Clarion Manuals

This is made by Clarion.The link to their site is- Clarion Home You can check their support page for a link to the manual and if it's not there you can request one directly.

Your best, with a Continental or Lincoln Navagator, to just
replace the air suspension with conventional shocks/struts,
after your vehicle is about 8 years old and you have put
time and money into previous air system problems

Strutmaster you hear a lot of and there has to be others

I hate to say it, but you'll probably need to see the dealer for the programing steps and code. Unless a local locksmith is able to reprogram the security system, the dealer will have to.

I do not know enough about the Hyundai's or the navigation systems to offer an answer. For those types of questions, you would either need to call and ask a dealer or go to http://www.alldatadiy.com , purchase a subscription for your vehicle, and navigate to the computer/electronics area. This is mainly where the dealers and auto repair facilities get their information as well. The cost is $26.95 for the first vehicle and 16.95 for each additional vehicle and the subscription is good for one year. The information is EXTREMELY detailed on everything from bulletins to recalls to diagrams to locations to repairs, etc. You can even check out a sample vehicle before you buy, so see for yourself. Sorry I can't help you further. Good Luck with it.