It has something to do with the exhaust valve......All i did was take your first sentence.....'how do u check the FI codes on a 2007 GSXR 600"
And copied it.....pasted it in a google search bar....
And whammo got some answers
Do you have an aftermarket exhaust?
SET Valve Mod Question K6-K7-K8 600/750 (Updated w/K5-K6 1k info) - Sportbikes.net
http://www.sportbikes.net/forums/hel...-gsx-r600.html
There have been millions of threads all over the internet on the ongoing problem with Gixxers and the FI light due to the
exhaust control system (ECS) - also known as
Suzuki Exhaust Tuning (SET).
The ECS/SET is described by Suzuki marketing as follows:
Suzuki Exhaust Tuning system is built into the mid-pipe using a servo-controlled butterfly valve to tune the exhaust system to match engine rpm and improving low end torque
Everyone argues that this is bullshit and Suzuki puts it there for emissions purposes and muffling sound. In fact, someone did a full Dyno test and proved that there's a 2hp gain at low end RPMs with ECS/SET disabled. Arguing this is for another forum.
In this forum, I want to tell you that I indeed fixed my FI light by removing the ECS/SET and I highly recommend it to Gixxer owners who are pestered by this stupid alarm.
The problem is that the exhaust control valve actuator (EXCVA) is an electric motor in the tail of the bike that is plugged into the ECM and the actuator is super sensitive with voltage and operation that any slight problem and it sends the FI code -C46 to the ECM and thus your FI light. This is happening on pretty much every Gixxer with a ECS/SET (which includes 2006-200
. It may happen at different mileage but if the cables or voltage get out of synch (which is normal with aging) the actuator throws -C46.
I've heard from other forums that Suzuki has a replacement actuator but some of those people were good for a while, then got FI eventually.
So my logic was that I don't care about emissions, muffling, low end torque (if that's even true), and my warranty (which is expired). But I DO care about a stupid FI alarm that comes on all the time for a retarded reason from a system that's not even needed.
So I removed mine and the FI light is gone for the -C46 reason.
Here is a good illustration on removing the ECS/SET:
TFRiders.com - View topic - SET Valve removal - 07 Suzuki GSX-R 600
If you buy a full exhaust system with new headers, the ECS/SET becomes useless anyway and you have to remove it. Here's the Yoshi full instructions which has illustrations on the wire removal for the ECM so you won't get the -C46:
Yoshimura TRC Stainless/Carbon Full System - 600 - PDF Instructions
And to help everyone understand how the ECS/SET works, I uploaded a few videos.
First, this is the EXCVA (actuator) and how it operates when you turn the ignition and engine start ON:
Suzuki 2006 GSX-R600 EXCVA operation
This shows how the EXCV (set valve) is spring loaded and will stay in the full open position if you remove the cables:
2006 GSX-R600 EXCV spring loaded operation
This shows you how my FI light is gone after the ECS/SET removal!!
FI light gone after ECS removal!
And this shows you how the EXCV (set valve) muffles the exhaust (may need earphones):
Illustration of how the EXCV muffles the exhaust on a 2006 Suzuki GSX-R600
And here is my gallery of the removal project. It shows you what the tail looks like with the actuator ON and OFF and then the cables and set valve illustration. The tail is so much cleaner without the stupid actuator.
Picasa Web Albums - Steve - ECS Removal
And then 2 suggestions regarding Nate's post on the detailed instructions on removing the ECS/SET.
1) He says to cut the wire - but the Yoshi instructions say to remove it from the plug. That's up to you. I went with the cut cause removing it was not that easy. If you can remove it, I guess that's cleaner for a reinstall if you ever have to.
2) The zip tie under the tank that hold the cables is actually a removable one. There's no need to cut it and replace it. Spin it around and you'll figure out the mechanism on how it's removable and reusable.