Service (SIR) Supplemental inflatable Restraint

[WVZR-1]

Originally Posted by KILLSHOTS

I made it real simple...removed the bulb from the DIC during my stereo install. When I adjust the steering wheel to my liking, I can't see the seatbelt light either. Will remove that bulb soon, too, as I tend to know whether my seatbelt is on and don't need the car's guidance in this area.

Ditched the TPMS sensors too. Since refusing to cater to the whims of all these stupid failing sensors, all my DIC says anymore is FULL ENGINE POWER!

You could put a 2 Ohm resistor at the air bag connector at the top of the column by just unplugging the air bag OR do it at the bottom of the column at that connector. It will be yellow and obvious going towards the top of the column. I believe 1/2 watt is the preferred. That will put out the "seat belt" light in cluster and it would have put out the DIC also.

[WVZR-1]

Originally Posted by LantanaTX

Anyone know how to clear the codes for a '01? '90 referenced above but not working on my car.

You meant I believe '91 BUT you have SIR codes as well as the ECM code 14 and the low level in the DIC?

[KILLSHOTS]

Originally Posted by WVZR-1

You could put a 2 Ohm resistor at the air bag connector at the top of the column by just unplugging the air bag OR do it at the bottom of the column at that connector. It will be yellow and obvious going towards the top of the column. I believe 1/2 watt is the preferred. That will put out the "seat belt" light in cluster and it would have put out the DIC also.

Nice! Easier than pulling off the whole cluster to remove the bulb. THANKS!!

[LantanaTX]

I may have reversed what Killshot did. When my check engine light didn't work, I pulled the DIC and found a few bulbs had been removed, but they were sitting just beneath the DIC behind the bezel. I put the bulbs back in and now have these annoying lights. "low coolant level" and "INFL REST". I pulled the codes for the INFL REST and got 26, column circuit open. I may have tripped this one accidently when I changed out the steering wheel. I know the airbag is connected properly now, so I was going to clear the codes and see if it comes back on. Just don't know how to clear for a '91. the '90 procedures above did not work. May have to take bulb back out if I can't figure it out!

[WVZR-1]

Originally Posted by LantanaTX

I may have reversed what Killshot did. When my check engine light didn't work, I pulled the DIC and found a few bulbs had been removed, but they were sitting just beneath the DIC behind the bezel. I put the bulbs back in and now have these annoying lights. "low coolant level" and "INFL REST". I pulled the codes for the INFL REST and got 26, column circuit open. I may have tripped this one accidently when I changed out the steering wheel. I know the airbag is connected properly now, so I was going to clear the codes and see if it comes back on. Just don't know how to clear for a '91. the '90 procedures above did not work. May have to take bulb back out if I can't figure it out!

The SIR codes are the most difficult to clear and I don't know that they can be done without a Tech1 for the '91+ cars. The DERM (Diagnostic Energy Reserve Module) was changed in '91 and I don't recall ever seeing a manual procedure for the SIR code clearing.

[LantanaTX]

Originally Posted by WVZR-1

The SIR codes are the most difficult to clear and I don't know that they can be done without a Tech1 for the '91+ cars. The DERM (Diagnostic Energy Reserve Module) was changed in '91 and I don't recall ever seeing a manual procedure for the SIR code clearing.

Ok,... those are $800 - $1,000 any other options? OBDII is so much easier!

[KILLSHOTS]

Originally Posted by LantanaTX

Ok,... those are $800 - $1,000 any other options? OBDII is so much easier!

Lantana...didn't mean to be a chump earlier with my post about pulling bulbs. My point was that I realized I could spend thousands of dollars chasing ghosts, trying to get these arguably unnecessary systems functioning perfectly, OR I could instead pull the bulbs and just ENJOY my non-NCRS car for a few thousand miles per year. I chose the latter.

You and I are both relatively new Z owners. Our cars are going to cost us a few bucks, so it's up to us to decide whether we're going to spend the money making our cars more drivable, or spend the money making sure that every wire is the correct color and length. I've decided to let a 25-year old car just be a 25-year old car, and not try to make it perfect.

Best of luck, and enjoy that beautiful gray car! GM should've painted them that color!

Chris

[LantanaTX]

Originally Posted by KILLSHOTS

Lantana...didn't mean to be a chump earlier with my post about pulling bulbs. My point was that I realized I could spend thousands of dollars chasing ghosts, trying to get these arguably unnecessary systems functioning perfectly, OR I could instead pull the bulbs and just ENJOY my non-NCRS car for a few thousand miles per year. I chose the latter.

You and I are both relatively new Z owners. Our cars are going to cost us a few bucks, so it's up to us to decide whether we're going to spend the money making our cars more drivable, or spend the money making sure that every wire is the correct color and length. I've decided to let a 25-year old car just be a 25-year old car, and not try to make it perfect.

Best of luck, and enjoy that beautiful gray car! GM should've painted them that color!

Chris

I actually thought you had a pretty good idea. However, I do all my own work and enjoy solving the mysteries. My car is no NCRS car and if anything is more of a restomod with its '95 exterior looks and non original color. Most of what I am chasing now are nickel and dime stuff and I have already had it at two car shows where it did very well. But I will pull the bulb if I can't clear the code in a reasonable way.

[Kevin]

When dealing with the SIR system, you must fix the problem to clear the codes. As the system does a self check every time the the key is cycled to the run position. Otherwise you will never clear the INFL light.

With the 91, you can use flash code diagnostics, but certain codes can only be read and reset using a Tech1 with the SIR cartridge. Code 51 can not be cleared from the history at all.

You are supposed to use the Tech1 to clear the codes, and the manual makes no reference to using the ground/unground method to clear the codes. If you correct the code 26 it should be changed to a "history" code and be removed from the "current" and the light will go out.

Your code 26 was more than likely caused by your swap of the steering wheel. Hopefully you have not pinched or damaged the wire in the column coming from the coil to the inflator module. You may get lucky and find that you did not insert the connector correctly.

[WVZR-1]

Originally Posted by LantanaTX

Ok,... those are $800 - $1,000 any other options? OBDII is so much easier!

Check your local Yellow Pages for "Air Bag Service" companies or contact a couple local collision shops and ask who they use for service work. A code read and clear by an independent could be very inexpensive.

Here's a link to an "information" TSB for '91 systems:

http://www.corvetteactioncenter.com/...Restraint+(SIR)

If indeed it's just a connection issue it may store to "History" but I believe there's no assurance that it will.

OBD II is only emission related and drive-train related. There is no DIY for SIR regardless of the balance of the systems on the vehicle.