Wiring for the Pass seat weight sensor?

gomer_110 · 03-12-2013, 09:25 PM

Working on eliminating the weight sensor in the passenger seat since I've gone to a set of racing buckets. I know it's not as simple as a resistor and already have a plan for that.

Does anyone know what the color coding for the 3 wires are?

I've already found that the red wire is +12V but I couldn't find anything on the white or brown wire.

Mr&Mrs · 03-12-2013, 09:27 PM

I know nothing about this stuff but I may have an extra pad for testing if needed. I cant get mine working correctly after the install Saturday. Heck I cant even get the light off of my dash after the reset. I was so afraid of this! It is killing my OCD lol

I think wstar was going to send you a pad to test with?

gomer_110 · 03-12-2013, 09:37 PM

I actually just bought a passenger seat out of a wrecked Z34 for cheap. Showed up yesterday and I've already got the mat removed and de-clothed.

Managed to expose the terminals tonight. What a PITA that was as this is not a plastic box the circuit board is housed in but instead a solid block of urethane like material.

Mr&Mrs · 03-12-2013, 09:42 PM

Wow.....look at all the sensor points ( I think ) on that thing. This pad is like the VVEL of weight sensors

I plugged my pad and seatbelt back in without soldering in the 4.7ohm resistors. I thought doing it that way I would not have to.

gomer_110 · 03-12-2013, 10:12 PM

Quote:

Originally Posted by Mr&Mrs

Wow.....look at all the sensor points ( I think ) on that thing. This pad is like the VVEL of weight sensors

I believe the sensor points are just piezoresistive based load cells. Assuming I'm right, making a switchable airbag box (on/off) would simple be a matter of replacing the sensor points with 2 resistors. One set of resistors would be "Off" and the other set would be "On".

Quote:

Originally Posted by Mr&Mrs

I plugged my pad and seatbelt back in without soldering in the 4.7ohm resistors. I thought doing it that way I would not have to.

The 4.7 ohm resistors have to be used to simulate the airbag itself. Without it the system knows the airbag is missing and as a result generates a error.

SouthArk370Z · 03-12-2013, 10:36 PM

Y'all may be able to get some info (or at least good hints) from the FSM.

gomer_110 · 03-12-2013, 10:49 PM

Quote:

Originally Posted by SouthArk370Z

Y'all may be able to get some info (or at least good hints) from the FSM.

That's where I found that the red wire is +12VDC but it makes no mention of the other 2 wires.

I really wish they would just have a full wiring schematic for the entire car.

ChipsWithDips · 03-12-2013, 11:12 PM

Does this help at all?

The fact that one of them says "Communication" might mean that it is using some kind of serial or CAN interface.

NitrousZ34 · 03-12-2013, 11:22 PM

I soldered the resisitors on and tried to reset my airbag light but im having no luck in doing so. I tried the method given on here several times and still nothing... Any other way in making the stupid flashing dash light go off?

SouthArk370Z · 03-12-2013, 11:26 PM

Check the wiring diagrams above the pages where the pinouts were found. And there should be a description of how the system works near the top of the section. I'm kinda busy right now or I'd find the pages for you. If you can't find what you need, I'll search the FSM later.

If there is any kind of electronics near the connector on the sensor, it probably uses CAN or other serial communications.

It looks like the pad is just a bunch of momentary contact "bubble" switches. I'm guessing that there is some electronics near the connector that counts the number of switches made and tells the module (BCM?) that controls the air bag system.
Edit: If I'm right about that, a simulator box would need the electronics. You should be able to fake the bubble switches near the electronics so the box wouldn't have to have a sensor pad crammed in there. OK. Now I really have to go.

Good luck searching

martin82 · 03-12-2013, 11:50 PM

That's something I mentioned before, one wire is doing some communicating back and forth..... I tried measuring resistance but that's not it.
I think the best way to do it is to just go ahead and set all weight sensors to on so the air bag is always on...
Does anyone know or have access to consult to see if this can be turned on or off all the time?

Mr&Mrs · 03-13-2013, 12:53 AM

I would rather just have it on all the time as well.

edconline · 03-13-2013, 12:56 AM

to see this thread. This exact situation was driving me insane last season, I gave up and just let the damn light blink. Hopefully someone can get to the bottom of this, I ALSO would just like all the airbags to be on all the time.

martin82 · 03-13-2013, 01:25 AM

I believe they make a module an aftermaket module for toyota etc, this might be something to look at as well... see how it works..

NitrousZ34 · 03-13-2013, 06:35 AM

It's extremely annoying. My resistors were done properly so it's not that. I tried the reset procedure 10+ times and still NOTHING. All I wanted was nice bucket seats!!!!

03-12-2013, 09:25 PM	#1 (permalink)
gomer_110 A True Z Fanatic Join Date: Aug 2011 Location: Perrysburg, OH Posts: 17,992 Drives: '11 Nismo #528 GM Rep Power: 36940	Wiring for the Pass seat weight sensor? Working on eliminating the weight sensor in the passenger seat since I've gone to a set of racing buckets. I know it's not as simple as a resistor and already have a plan for that. Does anyone know what the color coding for the 3 wires are? I've already found that the red wire is +12V but I couldn't find anything on the white or brown wire. __________________ '11 370Z Nismo #528 Fast Intentions \| Stillen \| Motordyne \| Uprev \| CSF \| Zspeed \| Z1 Motorsports \| AST \| Swift \| SPC \| SPL \| Whiteline \| Hotchkis \| Bride \| Schroth \| Robispec \| Cusco \| Nismo \| Volk \| Forgestar \| Hoosier \| RJM '17 Titan Bone Stock

03-12-2013, 09:27 PM	#2 (permalink)
Mr&Mrs A True Z Fanatic Join Date: May 2010 Location: Tampa Posts: 4,190 Drives: RZ34 Rep Power: 15161	I know nothing about this stuff but I may have an extra pad for testing if needed. I cant get mine working correctly after the install Saturday. Heck I cant even get the light off of my dash after the reset. I was so afraid of this! It is killing my OCD lol I think wstar was going to send you a pad to test with? DEpointfive0 likes this. __________________ Project Z <--Click - Check out the link too many mods to list!

03-12-2013, 09:37 PM	#3 (permalink)
gomer_110 A True Z Fanatic Join Date: Aug 2011 Location: Perrysburg, OH Posts: 17,992 Drives: '11 Nismo #528 GM Rep Power: 36940	I actually just bought a passenger seat out of a wrecked Z34 for cheap. Showed up yesterday and I've already got the mat removed and de-clothed. Managed to expose the terminals tonight. What a PITA that was as this is not a plastic box the circuit board is housed in but instead a solid block of urethane like material. Mr&Mrs likes this. __________________ '11 370Z Nismo #528 Fast Intentions \| Stillen \| Motordyne \| Uprev \| CSF \| Zspeed \| Z1 Motorsports \| AST \| Swift \| SPC \| SPL \| Whiteline \| Hotchkis \| Bride \| Schroth \| Robispec \| Cusco \| Nismo \| Volk \| Forgestar \| Hoosier \| RJM '17 Titan Bone Stock

03-12-2013, 09:42 PM	#4 (permalink)
Mr&Mrs A True Z Fanatic Join Date: May 2010 Location: Tampa Posts: 4,190 Drives: RZ34 Rep Power: 15161	Wow.....look at all the sensor points ( I think ) on that thing. This pad is like the VVEL of weight sensors I plugged my pad and seatbelt back in without soldering in the 4.7ohm resistors. I thought doing it that way I would not have to. __________________ Project Z <--Click - Check out the link too many mods to list!

03-12-2013, 10:36 PM	#6 (permalink)
SouthArk370Z Premium Member Join Date: Nov 2010 Location: South Arkansas Posts: 8,435 Drives: 2014 Challenger Rep Power: 324197	Y'all may be able to get some info (or at least good hints) from the FSM. __________________ Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma

03-12-2013, 11:12 PM	#8 (permalink)
ChipsWithDips Enthusiast Member Join Date: Mar 2011 Location: Austin, TX Posts: 279 Drives: '11 Gunmetal 370Z MT Rep Power: 14	Does this help at all? The fact that one of them says "Communication" might mean that it is using some kind of serial or CAN interface. gomer_110 likes this. __________________ PPE Headers SS/Coated/Wrapped \| Ebay y-pipe \| Custom 3" single exhaust w/ Magnaflows \| UpRev \| Racingbrake 2pc Rotors \| 40th calipers \| Eibach sways \| SPL endlinks, diff mounts \| RJM pedal \| Stillen Intakes, UDP, Flywheel \| M370 Manifold \| Z1 engine mounts, CSC-EK, Clutch \| Forgestar F14 18x10 \| Conti DWs \| Quaife diff/4.08 gears \| Nismo diff cover

03-12-2013, 11:22 PM	#9 (permalink)
NitrousZ34 Banned Join Date: Apr 2012 Location: Canoga Posts: 505 Drives: Myself crazy Rep Power: 0	I soldered the resisitors on and tried to reset my airbag light but im having no luck in doing so. I tried the method given on here several times and still nothing... Any other way in making the stupid flashing dash light go off?

03-12-2013, 11:26 PM	#10 (permalink)
SouthArk370Z Premium Member Join Date: Nov 2010 Location: South Arkansas Posts: 8,435 Drives: 2014 Challenger Rep Power: 324197	Check the wiring diagrams above the pages where the pinouts were found. And there should be a description of how the system works near the top of the section. I'm kinda busy right now or I'd find the pages for you. If you can't find what you need, I'll search the FSM later. If there is any kind of electronics near the connector on the sensor, it probably uses CAN or other serial communications. It looks like the pad is just a bunch of momentary contact "bubble" switches. I'm guessing that there is some electronics near the connector that counts the number of switches made and tells the module (BCM?) that controls the air bag system. Edit: If I'm right about that, a simulator box would need the electronics. You should be able to fake the bubble switches near the electronics so the box wouldn't have to have a sensor pad crammed in there. OK. Now I really have to go. Good luck searching __________________ Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma Last edited by SouthArk370Z; 03-12-2013 at 11:31 PM.

03-12-2013, 11:50 PM	#11 (permalink)
martin82 A True Z Fanatic Join Date: Nov 2011 Location: los angeles Posts: 2,636 Drives: 12 Nissan 370Z MB M6 Rep Power: 19	That's something I mentioned before, one wire is doing some communicating back and forth..... I tried measuring resistance but that's not it. I think the best way to do it is to just go ahead and set all weight sensors to on so the air bag is always on... Does anyone know or have access to consult to see if this can be turned on or off all the time?

03-13-2013, 12:53 AM	#12 (permalink)
Mr&Mrs A True Z Fanatic Join Date: May 2010 Location: Tampa Posts: 4,190 Drives: RZ34 Rep Power: 15161	I would rather just have it on all the time as well. __________________ Project Z <--Click - Check out the link too many mods to list!

03-13-2013, 12:56 AM	#13 (permalink)
edconline Track Member Join Date: Mar 2010 Location: Edmonton Posts: 855 Drives: 10' MB Z34 6MT T/S/N Rep Power: 22	to see this thread. This exact situation was driving me insane last season, I gave up and just let the damn light blink. Hopefully someone can get to the bottom of this, I ALSO would just like all the airbags to be on all the time. __________________ View Journal Audio Build

03-13-2013, 01:25 AM	#14 (permalink)
martin82 A True Z Fanatic Join Date: Nov 2011 Location: los angeles Posts: 2,636 Drives: 12 Nissan 370Z MB M6 Rep Power: 19	I believe they make a module an aftermaket module for toyota etc, this might be something to look at as well... see how it works..

03-13-2013, 06:35 AM	#15 (permalink)
NitrousZ34 Banned Join Date: Apr 2012 Location: Canoga Posts: 505 Drives: Myself crazy Rep Power: 0	It's extremely annoying. My resistors were done properly so it's not that. I tried the reset procedure 10+ times and still NOTHING. All I wanted was nice bucket seats!!!! FuszNissan and Mr&Mrs like this.

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