ZR-1 without LTPWS?

[rebelz]

Does anyone know if any ZR-1's were built without the LTPWS system? I have a 1992 ZR-1 and when I bought it it in 2007 had no sensors. It was originally sold in Canada eh! This winter (yes it's still winter here) I'm doing a bunch of upgrades so I decided to get the sensors. When I dug into the dash and removed the DIC there are no bulbs or wires or sockets to put them in. I'm not really sure what it is supposed to look like in there. There is a blue connector just sitting there not attached to anything. Can someone show me what it's supposed to look like. I would like to have a working system, but I don't even know if the module is there.
Rich

[GOLDCYLON]

Does anyone know if any ZR-1's were built without the LTPWS system? I have a 1992 ZR-1 and when I bought it it in 2007 had no sensors. It was originally sold in Canada eh! This winter (yes it's still winter here) I'm doing a bunch of upgrades so I decided to get the sensors. When I dug into the dash and removed the DIC there are no bulbs or wires or sockets to put them in. I'm not really sure what it is supposed to look like in there. There is a blue connector just sitting there not attached to anything. Can someone show me what it's supposed to look like. I would like to have a working system, but I don't even know if the module is there.
Rich

Whats your build sheet say for your car or the window sticker? Will tell you fast whats susposed to be there? If you dont have either you can order from the Corvette Museum.

[tomtom72]

There is also the list of RPO's under the lid on the center console lid, no?

I seem to remember something about the Canadian cars and some RF rule concerning our LTPWS .... I just can't remember what it was. You could go over to Corvette Action Center and ask Rob L. ( the site administrator ) as he owns a 90 Z Canada car.

:cheers:
Tom

[WVZR-1]

Does anyone know if any ZR-1's were built without the LTPWS system? I have a 1992 ZR-1 and when I bought it it in 2007 had no sensors. It was originally sold in Canada eh! This winter (yes it's still winter here) I'm doing a bunch of upgrades so I decided to get the sensors. When I dug into the dash and removed the DIC there are no bulbs or wires or sockets to put them in. I'm not really sure what it is supposed to look like in there. There is a blue connector just sitting there not attached to anything. Can someone show me what it's supposed to look like. I would like to have a working system, but I don't even know if the module is there.
Rich

Rich,

Yes your car build doesn't include UJ6 (LTPWS). You can confirm that on your SPID label. How to add it? I don't know.

If you were wanting just a "functional" LTPWS system there are some after-market systems that function much better than just the low-pressure warning, they actually display tire pressures. I would think it also substantially less expensive than adding the original. There are rim mount and valve stem mounting styles available I believe. Valve stem mount would be just a deflate, break down one side, install, inflate and drive off!

Until you asked I certainly didn't realize that it wasn't included in the Canadian builds!

Your RPO's that I expected Z49 (Mandatory Canadian equipment), U19 (Metric speedometer), V73 (Canada/US vehicle statement) and T61 (Daytime running lamps) are present.

[rebelz]

Yes your car build doesn't include UJ6 (LTPWS). You can confirm that on your SPID label. How to add it? I don't know.

If you were wanting just a "functional" LTPWS system there are some after-market systems that function much better than just the low-pressure warning, they actually display tire pressures. I would think it also substantially less expensive than adding the original. There are rim mount and valve stem mounting styles available I believe. Valve stem mount would be just a deflate, break down one side, install, inflate and drive off!

Until you asked I certainly didn't realize that it wasn't included in the Canadian builds!

Your RPO's that I expected Z49 (Mandatory Canadian equipment), U19 (Metric speedometer), V73 (Canada/US vehicle statement) and T61 (Daytime running lamps) are present.

Thanks to everyone who has responded. Although I didn't see the UJ6 listed, I just assumed that since "all ZR-1's" would have that, they didn't list it. Naive of me I guess. Now I have to decide what to do. I bought a nearly new set of '93 wheels this fall, which came with sensors and was going to use them. Then I found out the system was changed after '92 so I bought a complete set of the '92 sensors. I don't know what I need to put a stock system in but that's what I'd like to do or an alternative like you mentioned. Guess I'm in for some research. I'm sure glad the Internet exists. I really don't know what I'd do without it, and not just for the car stuff.
Rich

[QB93Z]

There were 11 Canadian export ZR-1's in 1992. Of those, only one was Yellow, #31.

Interestingly, in 1993 and on, the Canadian export ZR-1's did have Low Tire Pressure Warning System installed.

Good luck with your project.

Jim

[rebelz]

There were 11 Canadian export ZR-1's in 1992. Of those, only one was Yellow, #31.

Interestingly, in 1993 and on, the Canadian export ZR-1's did have Low Tire Pressure Warning System installed.

Good luck with your project.

Jim

Just a thought: The change in Sensors, Different Module Part# starting in 1993. 1993 and later Canadian Export ZR-1's equipped with LTPWS. Someone mentioned RF problems. I wonder if the change in '93 was not just a sensor upgrade, but an RF one as well to meet Canadian requirements. Enquiring minds want to know.
Rich

[GOLDCYLON]

Just a thought: The change in Sensors, Different Module Part# starting in 1993. 1993 and later Canadian Export ZR-1's equipped with LTPWS. Someone mentioned RF problems. I wonder if the change in '93 was not just a sensor upgrade, but an RF one as well to meet Canadian requirements. Enquiring minds want to know.
Rich

I doubt it its probably more reasonable to assume the RF problem really wasnt a problem after all. The LTPWS has been in C4s since 1989. Who really knows

[GOLDCYLON]

There is also the list of RPO's under the lid on the center console lid, no? :cheers: Tom


Yes

[batchman]

Just another data point, our 91 was CA delivered and has no LTPWS.

Don't know if the feature was common or normal on US deliveries.

Cheers, eh?
- Jeff

[Bob Elsdon]

I have a 90 black on black that I bought new in Vancouver, BC. I didn't come with low tire pressure warning and also has no bulbs in the dash. I did come with ONE wheel sensor that we found when I changed wheels.
Regards,
Bob

[ZZZZZR1]

I have a 90 black on black that I bought new in Vancouver, BC. I didn't come with low tire pressure warning and also has no bulbs in the dash. I did come with ONE wheel sensor that we found when I changed wheels.
Regards,
Bob

Bob,

Many times owners take out the bulb so there is no warning signal "if" they break a sensor. I ended up pulling my bulbs, but there are some that love having them on as security.

There are many posts about sensors (why to have them and why they aren't needed / unsafe).

Welcome to the Club!!!! Tell us about your new Z and love to see pictures!

:cheers:

David

[tomtom72]

The Canadian export cars did not have a LTPWS as there was an issue with the frequency or something like that....anyway no Canadian export cars have the LTPWS.


:cheers:
Tom

[scottfab]

Just a thought: The change in Sensors, Different Module Part# starting in 1993. 1993 and later Canadian Export ZR-1's equipped with LTPWS. Someone mentioned RF problems. I wonder if the change in '93 was not just a sensor upgrade, but an RF one as well to meet Canadian requirements. Enquiring minds want to know.
Rich

That's a real good question. Could it be that LTPWS exports to C were a no no for radiation issues until 93 ? There is a bell that is ringing in my head. One would have to confirm with one of the "elder" members like Hib or Dave Hill or Killebrew or jvd or ???

I am very interested in anything you learn about the new aftermarket tire pressure systems for my other cars. Please post info if you go that way.

[WVZR-1]

The Canadian export cars did not have a LTPWS as there was an issue with the frequency or something like that....anyway no Canadian export cars have the LTPWS.


:cheers:
Tom

I don't believe "ALL" fits here. I believe when the LTPWS was changed in '93 it was part of the "total" package and shipped everywhere. I don't have a Canadian VIN to confirm but if someone offers up a Z49 '93MY or later I'd be happy to confirm.

I just checked '95MY #002 that I recall being a Z49 build from a while back and yes it carries the RPO UJ6 so I'd assume the '93+ builds do also.

[alwayscode390]

Thanks for posting the option code.

My 90' has the Check LTPWS light come on when I start the car, then turn off after the diagnostic testing.

I just went to the tire shop to get the sensors swapped on a new set of wheels ... they said I have valve mount sensors and I should have wheel mount sensors.

Wondering if there is something going on there ... can you "tune" it out of the system ... or make tire mounted sensors read the stock system?

They were just going to remount them anyway since I am not throwing a code, but I wanted to see what was the deal.

Thanks :) ---

BTW , how much is the paperwork from the CORVETTE MUSEUM on our cars? ---

[scottfab]

...snip...

I just went to the tire shop to get the sensors swapped on a new set of wheels ... they said I have valve mount sensors and I should have wheel mount sensors.

Wondering if there is something going on there ... can you "tune" it out of the system ... or make tire mounted sensors read the stock system?

....snip...


I'm not aware of any stem mounted systems the work with the stock LTPWS. You don't have a remote after market readout somewhere? Can you contact the previous owner?

[alwayscode390]

Thanks Scott ... I called him the other day after hearing this , and he said he didn't do anything to the system ... he never threw codes.

Im questioning him on this, because these are not the wheels he had on the car when he bought it (or the tires that were on these a-molds when he first mounted them ... he had BFG's, now they are new Summitomos) ... so he atleast has to know if he swapped the sensors over or not.

Im not too worried about it , but it does seem weird ---

[WVZR-1]

I've never heard that it's been accomplished but it's been discussed a few times. Is it possible? Judging from your comments it's likely. If the tire/wheel is still broken down get the information off of the valve stem mounted sensors they say are present and post that. I should be able to ID them and see what's been done. It sounds quite preposterous but then again!

If the tire/wheel is still assembled lower the tire pressure dramatically in a wheel and drive the car to see if you get the light. I don't believe it would be possible with later sensors to replicate a factory type warning.

I remember reading a procedure to change the frequency of an incorrect band sensor to be used on a different location if the correct sensor couldn't be found so anything is likely possible.

[alwayscode390]

Sounds like a good idea, I will ask the shop to write down any numbers they see while swapping the stuff over ... thanks for that :) ---

[WVZR-1]

Sounds like a good idea, I will ask the shop to write down any numbers they see while swapping the stuff over ... thanks for that :) ---

You know it sounds like maybe you've got premium valve stems that are "nutted" and the shop is so accustomed to seeing nuts on the later production stem sensors so they've seen your "nutted" stems and assumed. Make sure you tell them where the sensors on the wheel are located and to be careful.

I'd wager this to be the case!

[alwayscode390]

You may be onto something. I don't have the car in front of me at this second, but here is a pic of the front wheel , looks like a nutted valve stem to me actually ---

http://i47.tinypic.com/20rlk6c.jpg

[Bob Elsdon]

Thanks David,

I actually am the original owner of the car and I changed the wheels about 12 years after I bought it. It never had the LTPMS on it. It's a black on black, Borla exh, Haibeck chip. The car has about 26000 miles on it. I put polished 95 Zr1 wheels on it and lowered it slightly.

Regards,

Bob

[ghlkal]

My 90' has the Check LTPWS light come on when I start the car, then turn off after the diagnostic testing.



1990 is the only year (IIRC) that you can remove all the wheel sensors and the system won't "yell" about it.

I removed all the sensors on mine, as 2 were non-functional. The bulb lights up on start up, but then turns off.

Before, with one or two bad sensors the warning light stayed on.

[alwayscode390]

OOOH, if someone can verify this before I get my new wheels installed ... I will go that route ( removing all of them ... if its not already done ). I don't want a light to be on though , thanks :) ---

[WVZR-1]

I believe that '90 & '91MY cars - you can remove all and you'll be fine. I can't put my hands on the information presently but it's best I recall. But if they're all good and the system is functioning why remove it? Do you just want to leave them on the old wheels? A check to see if they're there might be to just lower tire pressure in one wheel to maybe 15 - 18 lbs and try the system. Maybe they actually aren't there!

[alwayscode390]

I will lower the pressure and check.

If there is nothing in there I would rather not pay the shop to bust open the bead on all 4 wheels to check.

Whats the "MY" I keep seeing in posts by the years? Thanks :) ---

[WVZR-1]

Whats the "MY" I keep seeing in posts by the years? Thanks :) ---


MY - Model Year

[tomtom72]

I don't believe "ALL" fits here. I believe when the LTPWS was changed in '93 it was part of the "total" package and shipped everywhere. I don't have a Canadian VIN to confirm but if someone offers up a Z49 '93MY or later I'd be happy to confirm.

I just checked '95MY #002 that I recall being a Z49 build from a while back and yes it carries the RPO UJ6 so I'd assume the '93+ builds do also.

Yes, I am wrong and I spoke without engaging my brain!:o I tend to think in terms of a 90 Z because that's what I own....jez, I'm not with it sometimes! LOL

You are correct that the second system had Canadian approval.

:cheers:
Tom

[scottfab]

...snip....

Whats the "MY" I keep seeing in posts by the years? Thanks :) ---

There is a list now of some of the more cryptic AR-1 Net Registry related acronyms at:
http://zr1.net/forum/showthread.php?t=19226

[alwayscode390]

HAHAH awesome, thanks ^^^ ---