DIY Viper 5204 Remote Start
 

Ok this is kind of a work in progress and will take a couple days to make so be patient.
Going to post the info then take pics as I go.
So here goes!

Also, if you see any wiring errors please let me know!

Ok so here are the wiring colors I have found so far. I know the colors and pin codes are for the BRZ but I believe the FRS has the same.

Quick notes: Flex relay is basically a relay built into the remote start to be used for whatever needed.

Attachment 97493

Attachment 97494

Attachment 97495

Attachment 97496

Immobilizer:
So if you have a prox key version (push button start version) You will need a 1101T Universal proximity key module. Here is the wiring for it.


Attachment 97500

If you dont have a smart key version, Im not 100% sure on it but it lists the DEI 556UW immobilizer bypass unit, so Im guessing thats the one to use if you dont use the

The BRZ has two ignition wires, and two starter wires. Since the RS only has 1 of each, you will need to use the built in Flex relay, and a second additional relay to power the second starter and ignition. Below is a wiring diagram of how to do this using a single relay and the built in Flex relay.
Attachment 97861

reserved 3

As several people have mentioned, the locks are apparently positive, below is a wiring diagram to make an inverter for the remote start with two relays, You can supposedly buy ones online too but I opted for this.

Attachment 97502

Reserved 4

PROGRAMMING Notes:
Program Flex relay as starter 2