INFL REST light on - ZR-1 Net Registry Forums

| 1990 ZR-1 | · 03-05-2011

I took the steering column aparat today to try to fix the sloppy steering wheel, and I belive I put it all back together properly, but now the INFL REST is constantly iluminated. Is there any way to rest it without hooking into the ECU? I tried disconeting the battery, but it didn't do anything.

Any help would be appreciated.

Aurora40 · 03-05-2011

You can pull the code with a paperclip. That is the best start.

I believe you ground pin K.

| 1990 ZR-1 | · 03-05-2011

Quote:

Originally Posted by Aurora40

You can pull the code with a paperclip. That is the best start.

I believe you ground pin K.

Thanks Bob. I'm assuming this Pin K you're referring to is in the Diagnostic Connector under the drivers side dash? If so, I looked in there, and i didn't see any letter to identify the right pin. Do you mind elaborating a little bit? I'm very new to this car, so pleae bare with me

VetteVet · 03-06-2011

Here's the pinout:

Aurora40 · 03-06-2011

Quote:

Originally Posted by | 1990 ZR-1 |

Thanks Bob. I'm assuming this Pin K you're referring to is in the Diagnostic Connector under the drivers side dash? If so, I looked in there, and i didn't see any letter to identify the right pin. Do you mind elaborating a little bit? I'm very new to this car, so pleae bare with me

Sorry, I was on an iPad and it's tedious to type. I looked for a writeup to link you to, but didn't find one.

See the diagram above. With the ignition off, connect pin K and A with a bare paperclip or short length of wire. Then turn the ignition on. The "INFL REST" light will flash out the codes, starting with code 12, then any trouble codes, then 12 again. Each one flashes three times, and each digit flashes. I.e. it won't flash 12 times real fast, rather one time, then two times = "12".

If you have an FSM, this is on page 9J-A-2 of the 1990 FSM. Post the code(s) you get.

phrogs · 03-08-2011

did you remove the clock spring from the column?

And did you plug it back into the air bag?

| 1990 ZR-1 | · 03-08-2011

Quote:

Originally Posted by phrogs

did you remove the clock spring from the column?

And did you plug it back into the air bag?

I unplugged it from the airbag, but not from the steering wheel column, and I did plug it back in into the back of the air bag prior to reinstalling. I did pull the clock spring housing out of the way, so I'm not sure if it maybe unplugged from wherever it goes into. I'll trace it tonight to make sure it's still plugged in. When reinstalling the clock spring, I noticed that the blue warning label wasn't at the same position as prior to taking it off. So I wound the spring up by a couple of notches to where I thought the blue warning label was strictly going off of my memory. Not sure how sensitive the spring is to tightness or looseness, but maybe that has something to do with it?

I shorted out the K pin, and read the codes. I have code 12 flashing three times, and afterwards I get two short flashes, pause, and five short flashes, also three times. Does anyone know what code this is?

tomtom72 · 03-08-2011

SIR DTC 25 is telling you that the Right Front Sensor has an open circuit.

Basically it lost it's ground. This is the TSB that refers to corrosion building up under the sensor's mounting tab. The TSB's solution for this is to dismount the snesor, clean the sensor's mounting tab, clean the chassis under the mounting tab where the taped hole is, use dielectric grease and a couple of star washers above & below the tab and then clear the DTC.

That is the standard answer. There is the possibility the sensor went bad. That is fairly remote. I would say that as long as you did not pinch any wires inside the column the fault is the corrosion under the sensor.

I do not have a scanner so I can not scan in the pages from the FSM related to DTC 25.

Another thing. To clear the code the process is fairly time dependent in as grounding and ungrounding for specific time intervals with a +/- 0.5 second leeway. I used a door bell and the elapsed timer in the radio head to do mine. I tried doing it the way everyone else does it by just grounding K, but I couldn't get it done.

Tom

QB93Z · 03-08-2011

In the 1990 FSM, page 9J-A-24, a Code 25 is "Front Sensor #2 (RH)(Open Circuit)"

jrd1990zr1 · 03-08-2011

I'll e-mail you a copy of the Service manual in the next few minutes. I think I would try to clear the code and see if it sets a code 25 again.

My $0.02

John

03-05-2011	#1
\| 1990 ZR-1 \| Join Date: Feb 2011 Location: Medford, NJ Posts: 77	INFL REST light on I took the steering column aparat today to try to fix the sloppy steering wheel, and I belive I put it all back together properly, but now the INFL REST is constantly iluminated. Is there any way to rest it without hooking into the ECU? I tried disconeting the battery, but it didn't do anything. Any help would be appreciated.

03-06-2011	#4
VetteVet Join Date: Jan 2009 Location: Mandeville, LA Posts: 340	Re: INFL REST light on Here's the pinout: Last edited by VetteVet; 03-06-2011 at 01:37 AM. Reason: Embed image vice link

03-08-2011	#6
phrogs Join Date: Jul 2004 Location: Kalamazoo MI Posts: 1,752	Re: INFL REST light on did you remove the clock spring from the column? And did you plug it back into the air bag? __________________ JOHNNY P Currently own 90 ZR-1 #845 DRM 500 engine package 90 #226 Parts car Hit me up if you need anything.

03-08-2011	#8
tomtom72 Join Date: Dec 2004 Location: Jacksonville, FL USA Posts: 4,645	Re: INFL REST light on SIR DTC 25 is telling you that the Right Front Sensor has an open circuit. Basically it lost it's ground. This is the TSB that refers to corrosion building up under the sensor's mounting tab. The TSB's solution for this is to dismount the snesor, clean the sensor's mounting tab, clean the chassis under the mounting tab where the taped hole is, use dielectric grease and a couple of star washers above & below the tab and then clear the DTC. That is the standard answer. There is the possibility the sensor went bad. That is fairly remote. I would say that as long as you did not pinch any wires inside the column the fault is the corrosion under the sensor. I do not have a scanner so I can not scan in the pages from the FSM related to DTC 25. Another thing. To clear the code the process is fairly time dependent in as grounding and ungrounding for specific time intervals with a +/- 0.5 second leeway. I used a door bell and the elapsed timer in the radio head to do mine. I tried doing it the way everyone else does it by just grounding K, but I couldn't get it done. Tom __________________ 1990 ZR-1, Black/grey, #2233, stock. ZR-1 Net Reg Founding Member #316 & NCM member

03-08-2011	#9
QB93Z Join Date: May 2007 Location: Westminster, Maryland Posts: 3,689	Re: INFL REST light on In the 1990 FSM, page 9J-A-24, a Code 25 is "Front Sensor #2 (RH)(Open Circuit)"

03-05-2011	#2
Aurora40 Join Date: May 2005 Location: Leesburg, VA Posts: 2,713	Re: INFL REST light on You can pull the code with a paperclip. That is the best start. I believe you ground pin K. __________________ Bob Saveland Former owner of #2517 [IMG]http://a.random-image.net/aurora40/vette.jpg[/img] Last edited by Aurora40; 03-05-2011 at 10:58 PM.

03-08-2011	#10
jrd1990zr1 Join Date: Dec 2005 Location: Delanson, NY Posts: 915	Re: INFL REST light on I'll e-mail you a copy of the Service manual in the next few minutes. I think I would try to clear the code and see if it sets a code 25 again. My $0.02 John __________________ 1968 convertible Lemans Blue, 1986 coupe Medium Blue NCRS Top Flight (sold), 1990 ZR1 #2529 Red NCRS Regional and National Top Flight (sold), 1990 ZR1 #2124 Charcoal Metallic NCRS Top Flight 2010 & 2018, 2003 Anniversary Red Convertible (sold)