INF REST issue - ZR-1 Net Registry Forums

tomtom72 · 09-29-2007

Hi guys,

air bag issue and it's not the corrosion under the sensors on my 90....I checked the drivers side, code 16, and it is still clean from when I did both of them when I got the car.

Looks like the diagnostic chart for 16 says it's either the ground or the wiring or the DERM. Also seems to be some special equipment to run the flow chart properly. Seems without tool # J---- I'm taking a guess unless I find fried wiring or something unplugged.

Need any advice as the only part of the dash I've been behind is the center stack to do the Dr Don thing w/the head unit. The wiring for the SIR sys looks to be burried fairly well and the DERM itself looks like it's half way to doing a heater core job.....oh joy!....looks like if I do this SIR thing I might as well do the "while we're this far" thing on the H/C...just for sh&t$ and giggles.

I know, wrong side of the car for the H/C but the FSM makes it look like the center stack and the driver's side dash has to be out to get to the DERM..... might as well take apart the other side & do the H/C at the same time?

I guess I need some one to tell me not to pull the bulbs from the I/P cluster(little guy w/the seat belt) and the DIC but to fix the SIR properly. Oh, yes, the DERM's are ava @ about 500+ a copy. I'm not cheap but this stuff keeps eating at my mod buget!

Any opinions?

Tom

We Gone · 09-29-2007

Tom,
Donâ€™t give up yetâ€¦ I went thru about the same issues with the 90 I had. Find the connectors under the dash and check them. As you probably know they are yellow wires, one of them on mine had some corrosion in the plug. After I got it fixed it still took me several attempts to get the code cleared over many days.. Like 20+ tries each time

tomtom72 · 09-29-2007

Ah, the voice of reason from the PSP!

Hi ya Steve! Okay.....I'm gonna take the bolster down and hunt up the wiring and pray that it's something like what you encountered. Yea, I'm easy....but not cheap!

Thanks for listening bud!

but it's gonna have to wait till next week sometime because I have a Fall Folliage run to attend tomorrow.

Tom

TNorthcott · 10-05-2007

I just developed the same problem on my 90. The INFL REST light came on and my seat belt light on my dash stays on when my seat belt is engaged. I haven't messed with it yet, but if it is a simple plug check I am in. Can you tell me where exactly the yellow wires are? The driver or passenger side and if I need to remove anything to get to them?

Thanks for the input, I had some real issues with this baby initially and got some great advice and parts from this site, especially from Jeff.

tomtom72 · 10-05-2007

TN,

Over at the netregistry site in the maintenance section under the "how too" and "common issues" tabs is all the simple fixes. The factory put out a TSB on the grounding issue with the sensors at the front of the frame, left side under the brake M/C on that rail and the right side just inboard of the washer reservior on that rail.

Briefly, the sensors loose the ground to the frame due to corrosion & dirt. Ya got to r & r them and clean up the mounting points and that does the grounding issue and usually allowes the DTD to be cleared & you're dunn.

Driver's side = r & r gil panel, batt & tray and the sensor is forward & inboard from the batt tray, on the frame.
Pass side = r & r rear wheel house panel after r & r'ing middle w/h panel and the sensor can just be seen aft of the rear w/h panel on the rail. That one is a bit blind but doable without any further disassembly.

I haven't started looking for the connectors yet. Driver's side ya take down the knee bolster and it's down by the base of the steering collum, thick yellow wire.

Post up if ya need more specifics....I'll share what I've dunn so far.

Tom
Oh, yea, welcome to the asylum!

John Boothby · 10-05-2007

I had the same problem. Inf Rest light was on as well as seat belt light. I believe I had code's `14; 16 and 24. I removed front sensors and cleaned them. Replaced them using electric grease. Light stayed out for a little while, then came back on when car was warm. Code 24 was showing. I replace the right front sensor and lights are now out and have remained out. Part from Tom Henry Chev was around $126.

John Boothby · 10-05-2007

By the way, DISCONNECT THE BATTERY before tinkering with these. You do not want an unscheduled deployment of the airbag!!

The passenger side connector is under the carpet below the glovebox. Just pull the carpet back and you will see it.

tomtom72 · 10-06-2007

Thanks John for the head's up on the location of the pass side connector!

If I'm gonna check the driver's side connector....I'm gonna do the pass side also.

Tom

John Boothby · 10-06-2007

To be clear on the location of the right connector, it is under the FLOOR carpet against the firewall under the glovebox. Just pull it down and you will see a gray connector.

TNorthcott · 10-06-2007

Thanks for the information, unfortunately I have to go to Taledega for a race this weekend but I hope to fix this problem on Monday. Of course then I will be asking for help with what I am sure will be yet another issue. As my dad always said, it isn't the cost of the car it's the cost to keep them on the road!

09-29-2007	#1
tomtom72 Join Date: Dec 2004 Location: Jacksonville, FL USA Posts: 4,645	INF REST issue Hi guys, air bag issue and it's not the corrosion under the sensors on my 90....I checked the drivers side, code 16, and it is still clean from when I did both of them when I got the car. Looks like the diagnostic chart for 16 says it's either the ground or the wiring or the DERM. Also seems to be some special equipment to run the flow chart properly. Seems without tool # J---- I'm taking a guess unless I find fried wiring or something unplugged. Need any advice as the only part of the dash I've been behind is the center stack to do the Dr Don thing w/the head unit. The wiring for the SIR sys looks to be burried fairly well and the DERM itself looks like it's half way to doing a heater core job.....oh joy!....looks like if I do this SIR thing I might as well do the "while we're this far" thing on the H/C...just for sh&t$ and giggles. I know, wrong side of the car for the H/C but the FSM makes it look like the center stack and the driver's side dash has to be out to get to the DERM..... might as well take apart the other side & do the H/C at the same time? I guess I need some one to tell me not to pull the bulbs from the I/P cluster(little guy w/the seat belt) and the DIC but to fix the SIR properly. Oh, yes, the DERM's are ava @ about 500+ a copy. I'm not cheap but this stuff keeps eating at my mod buget! Any opinions? Tom __________________ 1990 ZR-1, Black/grey, #2233, stock. ZR-1 Net Reg Founding Member #316 & NCM member

09-29-2007	#2
We Gone Join Date: Apr 2004 Location: ATL. GA. Posts: 2,170	Re: INF REST issue Tom, Donâ€™t give up yetâ€¦ I went thru about the same issues with the 90 I had. Find the connectors under the dash and check them. As you probably know they are yellow wires, one of them on mine had some corrosion in the plug. After I got it fixed it still took me several attempts to get the code cleared over many days.. Like 20+ tries each time __________________ Steve 1990 Steel Blue/Black #2355 1990 Red/Red #1473 1991 Quasar /Black #118 Sold 1991 Turquoise/Black #766 Parted Out 1993 Yellow/White #179 Sold 1990 Black/Gray #1361 Headers/4:10s Sold

09-29-2007	#3
tomtom72 Join Date: Dec 2004 Location: Jacksonville, FL USA Posts: 4,645	Re: INF REST issue Ah, the voice of reason from the PSP! Hi ya Steve! Okay.....I'm gonna take the bolster down and hunt up the wiring and pray that it's something like what you encountered. Yea, I'm easy....but not cheap! Thanks for listening bud! but it's gonna have to wait till next week sometime because I have a Fall Folliage run to attend tomorrow. Tom __________________ 1990 ZR-1, Black/grey, #2233, stock. ZR-1 Net Reg Founding Member #316 & NCM member

10-05-2007	#4
TNorthcott Join Date: Jun 2007 Location: Lake St. Louis, MO Posts: 7	Re: INF REST issue I just developed the same problem on my 90. The INFL REST light came on and my seat belt light on my dash stays on when my seat belt is engaged. I haven't messed with it yet, but if it is a simple plug check I am in. Can you tell me where exactly the yellow wires are? The driver or passenger side and if I need to remove anything to get to them? Thanks for the input, I had some real issues with this baby initially and got some great advice and parts from this site, especially from Jeff.

10-05-2007	#5
tomtom72 Join Date: Dec 2004 Location: Jacksonville, FL USA Posts: 4,645	Re: INF REST issue TN, Over at the netregistry site in the maintenance section under the "how too" and "common issues" tabs is all the simple fixes. The factory put out a TSB on the grounding issue with the sensors at the front of the frame, left side under the brake M/C on that rail and the right side just inboard of the washer reservior on that rail. Briefly, the sensors loose the ground to the frame due to corrosion & dirt. Ya got to r & r them and clean up the mounting points and that does the grounding issue and usually allowes the DTD to be cleared & you're dunn. Driver's side = r & r gil panel, batt & tray and the sensor is forward & inboard from the batt tray, on the frame. Pass side = r & r rear wheel house panel after r & r'ing middle w/h panel and the sensor can just be seen aft of the rear w/h panel on the rail. That one is a bit blind but doable without any further disassembly. I haven't started looking for the connectors yet. Driver's side ya take down the knee bolster and it's down by the base of the steering collum, thick yellow wire. Post up if ya need more specifics....I'll share what I've dunn so far. Tom Oh, yea, welcome to the asylum! __________________ 1990 ZR-1, Black/grey, #2233, stock. ZR-1 Net Reg Founding Member #316 & NCM member

10-05-2007	#6
John Boothby Join Date: Jul 2005 Location: Las Vegas, Nevada Posts: 777	Re: INF REST issue I had the same problem. Inf Rest light was on as well as seat belt light. I believe I had code's `14; 16 and 24. I removed front sensors and cleaned them. Replaced them using electric grease. Light stayed out for a little while, then came back on when car was warm. Code 24 was showing. I replace the right front sensor and lights are now out and have remained out. Part from Tom Henry Chev was around $126. __________________ JB 1990 #148 Red/Saddle Haibeck AYBKG5 Chip/RC Engineering/Flowmasters/K&N/Samco/Fuzzy Dice :cheers:

10-05-2007	#7
John Boothby Join Date: Jul 2005 Location: Las Vegas, Nevada Posts: 777	Re: INF REST issue By the way, DISCONNECT THE BATTERY before tinkering with these. You do not want an unscheduled deployment of the airbag!! The passenger side connector is under the carpet below the glovebox. Just pull the carpet back and you will see it. __________________ JB 1990 #148 Red/Saddle Haibeck AYBKG5 Chip/RC Engineering/Flowmasters/K&N/Samco/Fuzzy Dice :cheers:

10-06-2007	#8
tomtom72 Join Date: Dec 2004 Location: Jacksonville, FL USA Posts: 4,645	Re: INF REST issue Thanks John for the head's up on the location of the pass side connector! If I'm gonna check the driver's side connector....I'm gonna do the pass side also. Tom __________________ 1990 ZR-1, Black/grey, #2233, stock. ZR-1 Net Reg Founding Member #316 & NCM member

10-06-2007	#9
John Boothby Join Date: Jul 2005 Location: Las Vegas, Nevada Posts: 777	Re: INF REST issue To be clear on the location of the right connector, it is under the FLOOR carpet against the firewall under the glovebox. Just pull it down and you will see a gray connector. __________________ JB 1990 #148 Red/Saddle Haibeck AYBKG5 Chip/RC Engineering/Flowmasters/K&N/Samco/Fuzzy Dice :cheers:

10-06-2007	#10
TNorthcott Join Date: Jun 2007 Location: Lake St. Louis, MO Posts: 7	Re: INF REST issue Thanks for the information, unfortunately I have to go to Taledega for a race this weekend but I hope to fix this problem on Monday. Of course then I will be asking for help with what I am sure will be yet another issue. As my dad always said, it isn't the cost of the car it's the cost to keep them on the road!