Went to Cory's Today!

[MickeyD]

Finally got my INFL REST and seatbelt light error fixed today. Made the drive to Henderson's Performance in New Braunfels, Tx. Made appt 2 weeks ago. Really didn't fix the problem. Cory convinced me to just let him take the bulbs out which I agreed. Took 2 hours and I was back on the the road. He even fixed a problem with my shifter not wanting to lock into reverse. He and his mechanic were great to deal with. Some how my "Full Power" light was not working as I left. They immediately took dash apart again and found a loose cable. All good now. Very happy with the experience. Now no more INFL REST BS. Thanks Cory!

[Fully Vetted]

Awesome guy to deal with. Has helped me many times over email. Glad to hear you got it fixed.

[32valvesftw]

I'm glad you got that worked out, Its great having an expert like Corey close to us.

[MickeyD]

I'm glad you got that worked out, Its great having an expert like Corey close to us.

Thanks again Don for your help. Thank God the reverse prob was the shifter. The first words out of Cory's mouth was synchros. Worst case I got a good drive out of it.

[MickeyD]

Awesome guy to deal with. Has helped me many times over email. Glad to hear you got it fixed.

He was very nice. I did expect a larger place, but I don't judge a book by its cover. My crane shop is small and not what you expect.

[G8nightman]

I wouldn't call removing the bulb a fix but glad it worked out for you.

[MickeyD]

I wouldn't call removing the bulb a fix but glad it worked out for you.

That's what I said in original post. I went with his recommendation. My call. Makes no difference in performance, its not a NCRS car. Just a nagging prob that I've had before. IMHO, this was easy fix. I won't have prob again. It was best way to solve, as I am not a mechanic, at all.

[GOLDCYLON]

Its your call but that wont fix the problem with deploying the airbag when you might need it in an emergency. (This is a safety issue) I remember reading the procedure how to fix this problem correctly in an old registry mag. I could look for it and make you a copy.

Your decision.. LMK GC

[FU]

Its your call but that wont fix the problem with deploying the airbag when you might need it in an emergency. (This is a safety issue)

Your decision.. LMK GC


Had an airbag light on in a 2006 SSV Tahoe I owned. Long story short ...my son wouldn't have been in the hospital for so darn long if the air bag would have been deployed. One dose not know the thoughts and resentment went through my mind while Nick was laying in the hospital bed. Just my experience.

[RodB]

I agree with GC on the safety concern but we all know it's a full time job keeping up with all the electrical gremlins in these cars. I have left my battery in the z 24/7/365 for five years because I'm concerned that repowering the electrics will cause something to fault! Someday I will need to replace that battery.

I do wonder if or how a 25 year old airbag would deploy if everything was working as it should. Thankfully I've never had to find out but I do wonder.


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[GOLDCYLON]

I do wonder if or how a 25 year old airbag would deploy if everything was working as it should. Thankfully I've never had to find out but I do wonder.


A valid concern. All I know is it "may" not deploy with the Blinking INFL REST light error. 9 times out of 10 its a corrosion issue where the frame mates with the airbag sensors and is a well known MY90 only issue. A little rust removal and cleaning and a little dielectric grease can resolve the issue. Nobody ever wants to find out

[Scrrem]

Its your call but that wont fix the problem with deploying the airbag when you might need it in an emergency. (This is a safety issue) I remember reading the procedure how to fix this problem correctly in an old registry mag. I could look for it and make you a copy.

Your decision.. LMK GC

Daryl,
Can you shoot me a copy of that article? I may be battling that demon when my car come back from paint I have done all the sensor cleaning and even replaced the sensor, still no joy. Hope it's not the DERM. Is it something you can get into a PDF and email it?
Rich

[GOLDCYLON]

Daryl,
Can you shoot me a copy of that article? I may be battling that demon when my car come back from paint I have done all the sensor cleaning and even replaced the sensor, still no joy. Hope it's not the DERM. Is it something you can get into a PDF and email it?
Rich

Will do! Crap I hope not. The MY90 DERM is a one of!!!!! totally different connector round vs. the square plug in the later years.

Wont be until tomorrow. Vday date night after work lol. It in one of the old registry mags and will take me a while to look for it.

[Dynomite]

I have left my battery in the z 24/7/365 for five years because I'm concerned that repowering the electrics will cause something to fault! Someday I will need to replace that battery.
Sent from my iPhone using ZR-1 Net Registry (http://r.tapatalk.com/byo?rid=90383)

I completely disconnect the battery in all Zs if left for over a day.....have done that for a long time with NO issues. Do have fully charged battery at all times by using the Disconnect. Even an overwinter (as long as 5 months) disconnect fires right up in the spring.

See Item #4 Starter, Starter Relay, Wiring Harness, Battery, and Plugs Tricks (http://forums.corvetteforum.com/c4-zr-1-discussion/3005470-tech-info-lt5-modifications-rebuild-tricks-500-hp-3.html#post1581564085)

[GOLDCYLON]

I completely disconnect the battery in all Zs if left for over a day.....have done that for a long time with NO issues. Do have fully charged battery at all times by using the Disconnect. Even an overwinter (as long as 5 months) disconnect fires right up in the spring.

See Item #4 Starter, Starter Relay, Wiring Harness, Battery, and Plugs Tricks (http://forums.corvetteforum.com/c4-zr-1-discussion/3005470-tech-info-lt5-modifications-rebuild-tricks-500-hp-3.html#post1581564085)

You must have the clock on the radio reset down pat Cliff ! ;)

[Dynomite]

I listen to XM and have cell phone time ;)




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[32valvesftw]

About the old airbag, I have concerns about that as well, to the point where was thinking about replacing the steering wheel with one of those cool Momos.

[MickeyD]

I'll take a copy of that too. I worry more about what happens if air bag deploys after 27 years than not at all. Guess I'll takes my chances.

[jss06c6]

Mike,

You made the right decision if you felt good about it! We did well with seat belts and no air bags for years. Our Z has shoulder belts as well, so I'd feel quite safe with a new steering g wheel without the airbag. Glad your happy with the fix, that's what counts.

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[MickeyD]

Mike,

You made the right decision if you felt good about it! We did well with seat belts and no air bags for years. Our Z has shoulder belts as well, so I'd feel quite safe with a new steering g wheel without the airbag. Glad your happy with the fix, that's what counts.

Sent from my XT1585 using ZR-1 Net Registry mobile app (http://r.tapatalk.com/byo?rid=90383)

Thanks Steve!

[George Maz]

Daryl, can you furnish me a copy of the fix for both the Seat Belt & INFL REST lights steadily illuminated.

I know the previous owner cleaned the grounds, and they were checked again a year ago. I had Mark Haibeck install a brand new nos 1990 DERM module that I sourced from Europe, and now months later the lights are back. I think it's weather related, as I do drive this car occasionally...about 5000 miles this year, and I reside in a coastal salt-air environment. I'm not really into pulling bulbs, but I'm wishing I had.

FYI, there's a Texas company that will fix the 1990 DERM for $100 + shipping. Although, I had already bought the nos one for $350, and had a time constraint. A few weeks prior another nos module sold for $200, so prices & availability are unpredictable for this repair.

1990 DERM is a '90 specific part, but it's all 1990 corvettes, not just ZR-1...post airbag deployment it becomes hardset with a code, and cannot be reused.

[GOLDCYLON]

About the old airbag, I have concerns about that as well, to the point where was thinking about replacing the steering wheel with one of those cool Momos.

I'd have more concerns about one of those new Takata air bags made in China that an older bag made in the US.

[Fully Vetted]

He was very nice. I did expect a larger place, but I don't judge a book by its cover. My crane shop is small and not what you expect. The question is do you have a liquor store attached to your crane shop?

I'd have more concerns about one of those new Takata air bags made in China that an older bag made in the US. No kidding. I'd have more concerns about one of those new Takata air bags made in China than I would no air bag at all.

[GOLDCYLON]

Daryl, can you furnish me a copy of the fix for both the Seat Belt & INFL REST lights steadily illuminated.

I know the previous owner cleaned the grounds, and they were checked again a year ago. I had Mark Haibeck install a brand new nos 1990 DERM module that I sourced from Europe, and now months later the lights are back. I think it's weather related, as I do drive this car occasionally...about 5000 miles this year, and I reside in a coastal salt-air environment. I'm not really into pulling bulbs, but I'm wishing I had.

FYI, there's a Texas company that will fix the 1990 DERM for $100 + shipping. Although, I had already bought the nos one for $350, and had a time constraint. A few weeks prior another nos module sold for $200, so prices & availability are unpredictable for this repair.

1990 DERM is a '90 specific part, but it's all 1990 corvettes, not just ZR-1...post airbag deployment it becomes hardset with a code, and cannot be reused.



Hi George yes I am/was aware that a 90 C4 and a 90 ZR-1 air bag are the same but the airbag is indeed a one year only. The problem is this was the first year of introduction of the drivers side airbag to the corvette as airbags were non mandated as required equipment until the mid 90s for all vehicles by federal law. Best case example of this is the rear view camera that was required on all vehicles MY 2016 and beyond.
I also remember your searching for a new DERM to solve your problem. I heard about a rebuilding Company however I had no idea who the vendors are or were. However I have seen a Company on Ebay that also rebuilds them. To date I don't know of a forum member who has gone this route with a rebuild.


Back to the 90 Corvette. It was damn impressive of GM and the Corvette to introduce an airbag into the 1990 model 4-5 years before it was required by Federal law so GM took a giant leap there. The problem that remains to this day and why it only affects the 90 MY only is due to the grounding points (CHASIS) GM used to ground the airbag impact sensors (accelerometers) along the frame points. GM changed this in the 91 model due to this problem and this why this fault problem or fault code only a problem in MY 90 years. Simply put the engineers changed the ground pathways


The impact sensors underside points need to be bare and devoid of rust and your living next to the ocean and the prevalence of increased rust bolsters my argument and this problem. The mating surfaces must be thoroughly cleaned and dielectrically greased to prevent rust intrusion after the repair or if you prefer maintenance is preformed. Then you should be about to rest the system.


I have found the articles I am looking for. I will scan them tomorrow and give them to anybody who wants them. the first article is the Fall issue of KING of THE HILL Volume 2 number 1 written by Gordon killebrew on pg 19 "S.I.R. Operation and Fault codes. The second article which details the maintenance repair is from the Heart of The Beast dated 2011 issue 3 26 by Michael Rierson "Inflatable Restraint Fault Correction" Pgs 10-13 with pictures.

[GOLDCYLON]

First article




http://i1120.photobucket.com/albums/l498/goldcylon/Mobile%20Uploads/2017-02/15964613-DF29-4830-B6E3-31EC0FFC398A_zpsxv8n5ti9.jpg?t=1487115139

Second article

http://i1120.photobucket.com/albums/l498/goldcylon/Mobile%20Uploads/2017-02/C5BC1973-15F0-499C-B039-28ECE1BAE57F_zpsr8tn0sb9.jpg?t=1487115399

http://i1120.photobucket.com/albums/l498/goldcylon/Mobile%20Uploads/2017-02/A599F39A-884A-431F-8CE6-53DF83ACB5CC_zpscrkut7bx.jpg?t=1487115609

http://i1120.photobucket.com/albums/l498/goldcylon/Mobile%20Uploads/2017-02/6327DC3C-4600-4D13-A0B7-CE6840549156_zpsf0xittyx.jpg?t=1487115751

http://i1120.photobucket.com/albums/l498/goldcylon/Mobile%20Uploads/2017-02/6D68AF68-BC0A-46E2-826B-B3652B931420_zpsfc8mzooi.jpg?t=1487115863

[Dynomite]

Back to the 90 Corvette. It was damn impressive of GM and the Corvette to introduce an airbag into the 1990 model 4-5 years before it was required by Federal law so GM took a giant leap there. The problem that remains to this day and why it only affects the 90 MY only is due to the grounding points (CHASIS) GM used to ground the airbag impact sensors (accelerometers) along the frame points. GM changed this in the 91 model due to this problem and this why this fault problem or fault code only a problem in MY 90 years. Simply put the engineers changed the ground pathways

The Air Bag Crash Sensor does not have to be grounded to function.....only grounded to assure it is in place to function. If it is not grounded it appears it is not in place....but will actually function if in place.

For the 1991 through 1993 the Air Bag Sensors do not have to be grounded to work in a crash....they DO need to be attached to the Frame Rails however. The Grounding on the 1990 was set up to assure the sensors were attached to the Frame Rails. If the bolts were removed from the sensors the sensor would pass as air bag deployable but would not actually deploy the air bag for obvious reasons. This explains why I got NO INFL REST warning on the panel when I totally removed the 1991 Sensor from the Frame Rail in my test.

I am now thinking the Air Bag Sensors on the 1990 ZR-1 will function and Deploy the Air Bag even if not grounded. The 1990 Air Bag Sensors will only appear not grounded/not connected on the panel as INFL REST indicating/suggesting the Air Bag Sensors are not installed when in fact they ARE Installed. To get rid of that INFL REST Indication on the Panel (as well as the Red Seat Belt Indication) requires the Air Bag Sensors be Re-Grounded. I am not going to jar the Air Bag Sensor to see if the Air Bags Deploy to test that theory.

[MickeyD]

[QUOTE=Fully Vetted;257530]The question is do you have a liquor store attached to your crane shop?

Construction starts next week. However, Margarita machine is being delivered tomorrow in interim.

[MickeyD]

About the old airbag, I have concerns about that as well, to the point where was thinking about replacing the steering wheel with one of those cool Momos.

I think that is a great idea. Especially now that a 27 year old air bag may not work or do more damage to me deploying. Besides it gives me an original steering wheel with intact air bag. Now all I need is black 94 or 95 seats for my wide arse. 90 seats suck for that.

[MickeyD]

Mike,

You made the right decision if you felt good about it! We did well with seat belts and no air bags for years. Our Z has shoulder belts as well, so I'd feel quite safe with a new steering g wheel without the airbag. Glad your happy with the fix, that's what counts.

Sent from my XT1585 using ZR-1 Net Registry mobile app (http://r.tapatalk.com/byo?rid=90383)

Btw, Steve, I don't remember if my '77 Nova with a massive 305 had air bags or not but, I quickly installed Jensen Triaxles!

[jss06c6]

Btw, Steve, I don't remember if my '77 Nova with a massive 305 had air bags or not but, I quickly installed Jensen Triaxles!
[emoji41] [emoji41] [emoji41]

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[Andy]

About four years ago, I used Airbag Systems, Inc in Allen, TX to rework the DERM in my 90. When I got it back and installed, all my codes went away.

[GOLDCYLON]

I have the articles pictured above in a PDF format. If you want a copy pm your email address. Thanks GC

MickeyD, Scrrem and George Maz I have already sent the pdf to you email addresses in your profiles as you requested a copy in this thread. GC

[GOLDCYLON]

About four years ago, I used Airbag Systems, Inc in Allen, TX to rework the DERM in my 90. When I got it back and installed, all my codes went away.

Ok Andy thanks for that a success story with a rebuilder !

[MickeyD]

I have the articles pictured above in a PDF format. If you want a copy pm your email address. Thanks GC

MickeyD, Scrrem and George Maz I have already sent the pdf to you email addresses in your profiles as you requested a copy in this thread. GC

Thanks much.

[Blownrunner]

I had my SIR light come on on my 91'. fault code indicated a intermittent open in the SIR system. Turns out the entire system is tested about 100 times a second for an open. The advisory light in the center is pushed in and secured with a few screws, mine were loose. Apparently the system is so well monitored it even sensed an open in the indicator bulb. Tightened everything back down, cleared the code, no problems since.

[USAZR1]

About the old airbag, I have concerns about that as well, to the point where was thinking about replacing the steering wheel with one of those cool Momos.


I installed a Momo Apache wheel in my 90 and a Momo Tomcat in my 94.
Not so sure I would trust a 25+ year old airbag,either.

[BigJohn]

I installed a Momo Apache wheel in my 90 and a Momo Tomcat in my 94.
Not so sure I would trust a 25+ year old airbag,either.

The C4 should still be good!