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Old 05-02-2006, 04:44 PM   #1
TRooper
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After finding a Spec C Type RA full interior for an awesome deal, I began researching swapping seats into an 06 WRX TR. The 06 model has a "smart airbag system". More info about that can be found at this thread.

http://forums.nasioc.com/forums/showthread.php?t=894452

Unbolt neg. battery terminal first.

The below pics are from my passenger detection system swap. This system includes, a seat belt sensor, passenger weight detection bladder with module. The seat also has side airbags integrated into the seat.



The seat belt sensor is a direct swap just unclip, unbolt, bolt to new seat, and reclip. It doesn't get any easier.
Helpful airbag clip removal diagram-Thanks for the link Nhluhr
http://wrx.grapon.com/techdocs/02.%2...0Connector.pdf

I used the resistor trick to fool the side airbags.



You will need to lift the upholstery retainer clips on the seat (two small black plastic clips on the sides,



and one long plastic piece on the front of the seat.



Fold back the upholstery slightly, and lift the foam. You will need to pop out two little green retainer clips.


The bladder will then slide right out from the front of the seat.


Removing the module (black plastic box) is a little more involved. You will need a drill for this. Unplug the harness, and drill out the two rivets.


Here is the bladder in the specC seat. The module is not mounted in this picture, but I used industrial 3M double sided tape. I also had to fabricate a small mounting bracket to hold the signal transducer. (This is the black plastic piece that converts the gel bladder's mechanical signal to an electrical signal that then goes to the module.) I used a small piece of steel much like the small L bracket (to the left of the drill) in the above pic.


Re-attach everything.

Edit: 12/12/11, I just picked up a huge bag of 3.3 ohm resistors, pm me if you need some.
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Last edited by TRooper; 12-12-2011 at 08:45 PM.
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Old 05-02-2006, 04:45 PM   #2
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The passenger airbag is now functional with my new seat. (Friend sitting in seat with seatbelt on.)


New Ver 9 Spec-C RA seats installed with base swap for driver's height adjustment

Last edited by TRooper; 06-25-2011 at 05:52 PM.
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Old 05-07-2006, 09:32 PM   #3
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I performed the removal part of this mod today... removing the weight sensing bladder and control module from my stock 06sti seat. Maybe soon I'll get around to attempting to install it into my aftermarket seat.

The removal was SUPER easy, by the way.
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Old 05-14-2006, 06:40 PM   #4
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and here's a step-by-step of placing the occupant detection system into a Corbeau CR-1 passenger side aftermarket seat:


Here's the pressure bladder, removed from the stock seat. It's three layers - a felt pad, the bladder itself, and then a protective plastic sheet on top:


remove the rails from the new seat (if they were already installed):


this is the bladder, the seatbelt sensor, and the control module. The bladder and seatbelt sensors plug into the module:


peel back the upholstry to gain access to the bottom. On the Corbeau seats, it's a velcro flap:


This is the underside of the seat exposed. You will need to get the bladder between the pad and the springs:


On the Corbeau CR-1, you can lift up the seat-cushion a little bit and gain access to where you need to get the bladder:


Here, I am sliding the bladder into its new home from the gap in the seat-cushion. It's a tight fit so work carefully. You don't want to rip the nipple off the bladder:

Last edited by nhluhr; 02-20-2008 at 09:09 AM. Reason: updated URL for pictures
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Old 05-14-2006, 06:41 PM   #5
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Continue working the bladder into place from below to help guide it. Don't forget to gently pull the connector through:


Once into place, use zip-ties and the pre-existing slots in the bladder to secure it into place:


There is also room to mount the module to the underside of the springs using zipties:


Notice the springs are recessed up into the bottom so the module doesn't hang down much:


connect whatever sensors you can and dress the cables carefully with zip-ties:


close the flap over the module with the two sensors sticking out towards the seatbelt side:


replace the rails, routing the seatbelt sensor and plugging it in such that it won't hang on anything when you slide the seat back and forth:


Now you can reinstall the seat back into the car. You'll need to substitute a 3-ohm resistor for the airbag connector and then just plug the remaining connector from the module into the matching one in the car. Once reinstalled, you can test the operation by starting the car and leaning over onto the passenger seat and putting your weight on the cushion - watch the light in the clock assembly to ensure operation. It should go to ON once you have put some pressure on the cushion (and bladder).

Last edited by nhluhr; 02-20-2008 at 09:10 AM. Reason: updated URL for pictures
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Old 05-15-2006, 01:12 PM   #6
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Great info here nhluhr.
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Old 05-15-2006, 04:15 PM   #7
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but thank YOU for figuring out how to get the occupant detection out of the stock seat
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Old 10-31-2006, 12:13 AM   #8
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Is there a way to trick teh light to stay "on" with a resistor? if so what size? 3.3ohms?
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Old 10-31-2006, 12:35 AM   #9
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3 ohms is the resistor to fool the airbag system when you simply unplug/remove an airbag. I know of no way to trick the system for removing the occupant detection system.
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Old 10-31-2006, 12:43 AM   #10
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^There probally is, but being that it is a "smart" airbag system, the computer wants to do more than simply activate the airbag. It not only wants to deploy it when neccessary but it wants to know how hard to deploy it. I am sure if you take some ohm readings while sitting on the seat, you can figure out the proper resistance needed and use the corresponding resistor to keep the bag on full deployment. But this raises more questions. What would the resistor have to replace? Would it replace the gel-filled load sensor only, could you rig it to replace the load sensor & load sensor computer all together.
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Old 10-31-2006, 09:23 AM   #11
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Good info from all. Unfortunately I don't think the Sparco Evo seats would allow for the use of the bladder, although with some work it might be possible.

Question 1: Where'd you get the resistors for the side airbag plugs, and exactly what ones do I need to get?
Question 2: If you still have the passenger airbag sensor disconnected, but have the resistors in for the side airbags, does the the dash airbag light go off? If not, I wonder if I coud just stuff the sensor under the seat so it's connected?

Too many sensors. I should have gotten an '05.

Thanks guys.

Last edited by mav1c; 10-31-2006 at 09:53 AM.
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Old 10-31-2006, 10:18 AM   #12
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care to tell us where u got the awesome deal on those seats?
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Old 10-31-2006, 03:07 PM   #13
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i really don't mind seeing the airbag light, but is there anything else to be concerned about.

and when you are using the resistor is that tricking the car into thinking that there is an airbag there and it turns off the airbag light correct?
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Old 04-02-2007, 10:53 PM   #14
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well i finally put in my Prodrive Recaros. even tho i did the swap at a place without internet access..i still managed to get it done with the faint memory i had of this thread. all in all, it worked out perfect and all sensors are happy and the passenger side works like a charm! credit to the guy that helped me install them. will post pics later(in the correct forum that is)
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Old 05-11-2007, 02:46 PM   #15
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thanks for the write-up. i used it to install my bride euro ii.

i have a question for the drivers seat. where is the drivers seat position sensor? if it runs next to the seatbelt one and goes through the back of the seat how do i remove it? its the last one before my airbag light turns off.
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Old 05-11-2007, 02:51 PM   #16
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nice work.

Quote:
Originally Posted by TRooper View Post
The passenger airbag is now functional with my new seat. (Friend sitting in seat with seatbelt on.)
You mean the front airbag only, correct? (IIRC, the jdm seats don't have side ABs)
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Old 05-11-2007, 03:25 PM   #17
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Quote:
Originally Posted by aznr1c3bo1 View Post
thanks for the write-up. i used it to install my bride euro ii.

i have a question for the drivers seat. where is the drivers seat position sensor? if it runs next to the seatbelt one and goes through the back of the seat how do i remove it? its the last one before my airbag light turns off.
Driverside (DS) rail position sensor is fixed to the bottom of the seat. It surrounds the rail. You can unbolt from the stock seat and secure it to the underside of the Bride or zip tie it out of the way. I am not aware of anyone who has made this functional on an aftermarket seat. I recently switched to a 06 USDM base with my JDM DS seat, thus I was just able to clip it into the factory spot. The only way I could see the DS rail sensor needing to be functional is if the driver is very short. You can look at the factory rail and notice that the sensor will only become closed or "triggered" when the seat is slid extremely close to the wheel.
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Old 05-11-2007, 03:27 PM   #18
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Quote:
Originally Posted by shemoves View Post
nice work.



You mean the front airbag only, correct? (IIRC, the jdm seats don't have side ABs)
Yes front bags only, JDM seats do not have side airbags.
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Old 05-18-2007, 01:59 AM   #19
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this kid keeps telling me that since i have brides now and theres not place to hook up the sensors that my steering wheel airbag doesnt work... i thought that only affected the side airbags?
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Old 05-18-2007, 08:09 AM   #20
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Quote:
Originally Posted by evo 3ater View Post
this kid keeps telling me that since i have brides now and theres not place to hook up the sensors that my steering wheel airbag doesnt work... i thought that only affected the side airbags?
If the side airbags are disconnected the entire SRS system is disabled, so none of the airbags will be active.
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Old 05-18-2007, 12:55 PM   #21
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^^ Which is why you need to install the resistors in the harness.
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Old 05-18-2007, 02:07 PM   #22
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thats ****ing retarded
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Old 05-19-2007, 12:30 AM   #23
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Quote:
Originally Posted by evo 3ater View Post
thats ****ing retarded
I think it's a good idea to NOT deploy the airbags when the system detects a fault.

For one, airbags are extremely expensive and secondly they are extremely powerful. Deploying them to an occupant that is sitting much lower than they would on stock seats could be very dangerous. It's called a "failsafe".
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Old 11-03-2007, 01:02 PM   #24
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I just completed this mod with some NRG Carbon Fiber bucket seats. They don't have the springs like these and are not adjustable back seats. I used some velcro on both sides of the bladder to attach to the seat, and the seat cusions. There is a handle hole in the bottom of the seat where I routed the wiring below the seat.

So if you got some bucket seats, as long as there is a hole in the bottom of the seat, you should be good to go!
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Old 11-29-2007, 04:55 PM   #25
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Sorry to bring this thread back, but is it necessary to make any modifications if I am placing 06 seats into my 05 sti?
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