Hi guys,

My key fobs open the doors correctly and everything works fine, however the TPMS system displays "Reset Tire Monitor" and does not give the tire pressure.

Anybody have ideas? Is there a way to use the Tech2 to look at the tire pressure to see if it is working?

Thanks,

Cedric

 

you may have a problem with the receiver in the TPMS computer which is part of the RCDLR module. the sensors transmit to this module. pretty sure it is located in the front console behind the ashtray.

or you may just have to reprogram your car to see the sensors with a programming tool

 

There is no connection between the entry/start fob and the tire pressure monitering sytem.

Have you replaced wheels/tires recently without swapping the old sensors into the new wheels/tires?

 

never said there was a connection between the entry/start fob and tire pressure monitoring system.

the tpms sensors transmit to the tmps computer which is part of the RCDLR

not saying the OP has this problem, but it is a possibility

http://forums.corvetteforum.com/c6-c...rt-number.html

 

I have the same question that haljensen asked:

I assume your DIC reads "xx psi" for all tire pressures, is that what it's showing?

It sounds like you just simply need to have the sensor data programmed properly into the TPMS computer in the car.

Do you have access to a Tech 2? If so, I don't know whether it will display pressures, but if it does it will just be showing what the TPMS knows, and it sounds like your TPMS isn't getting reports from your sensors.

However, all higher end TPMS tools can do diagnostics on the sensors. Some tools will just simply flash a light or beep if it gets a signal from the sensor, but tools with a screen, such as the GM tool, can show the pressure, sensor ID#, frequency it's transmitting on, signal/battery strength of the sensor's internal battery, etc.

Below is a video of a tool that has a screen exactly like the GM tool. It's hard to see in the video, but after I trigger each sensor there is a bunch of data displayed on the screen about that sensor. You can definitely tell if the sensor is working properly. If you take the car to a GM dealer they can use their J-46079 tool that looks and performs exactly like that tool in the video.

I suspect there is nothing wrong with your TPMS computer in the car (as mentioned, it's a section of the RCDLR module) and you probably just need a relearn procedure performed - just like is performed in the video.

Bob

 

Hi,

I apologize for not being specific on my issue, my bad.

The TPMS system works fine in US zone with the tires, but if I flip the BCM to Japan mode it doesn't. Everything else works though.

Changing to Japan induces loss of TPMS connectivity.

At this point I'm wondering it is a requirement to have the SLCM installed (PITA because I don't know what else it's going to pull, plus the harness is darn expensive) to have proper behavior or if it is due to the lack of external antenna that only the Japan model has.

The car refuses to perform learn mode in Japan mode, even with the Tech2 (I don't get the honks when activating the TPMS in the tires).
My guess is the lack of the external antenna that is installed with the japan export model, but I haven't any information regarding said antenna (P/N, ...)

Thanks and sorry for the lack of explicit details surrounding this issue.

a++ Cedric

 

Oooooohhhhhh!!!! Now I think I understand what your problem may be!!!!

First, let me ask, WHAT THE HECK ARE SWITCHING TO THE JAPAN MODE FOR?!?!?!?!?!?!?!? I had no idea that you could do that, but if in fact that's what you're doing, I think I know what is happening when you do that.

I looked at your profile and I think it said you have a 2008. The 2005-2009 C6 built for the U.S./Canada market have a TPMS that receives the transmission from the sensors on a frequency of 315 mHz. Cars built for the European market have a TPMS that receives a frequency of 433.95 mHz. I'm not sure, but I think some Asian countries use a frequency in the 8xx mHz range.

U.S. spec 2005-2009 C6s use a sensor with GM Part# 25758220 and those sensors transmit on 315 mHz. The GM sensors are gray in color.

Euro spec 2005-2009 C6s use a sensor with GM Part# 25758221 and those sensors transmit on 433.95 mHz. Those sensors are orange in color.

What sensors are used in cars built for the Japanese market, I don't know - but I would guess that it's the orange ones that transmit on 433.95 mHz.

I'm not sure what all changes in the car when you switch to the Japan mode, but the TPMS computer is part of the RCDLR module, and I think the radio receiver that receives the transmissions from the sensors is in that unit. Whether changing to the Japan mode swaps that receiver over to pick up transmissions on a different frequency, I dunno!

So......I'm not sure, but I think that's why you aren't able to program your gray U.S. sensors when you swap over to the Japan mode - I think the TPMS is only looking for sensors that are transmitting on a different frequency than the U.S. sensors transmit on.

At least that's my guess!

Bob

 

Hi Bob,

In Euro mode, the TPMS works just fine but the BCM complains about the SCLM and refuses to start. I am not to excited at the prospect of installing this in the car as it doesn't look straight forward based on my reading of the bible.

I haven't had any issues other then the lack of tire pressure visibility. During the snow driving school I really missed having the pressure on the DIC, so I thought I would try and address this if possible now that all else is working.



a++ Cedric

ps: Snow driving school in vette: http://forums.corvetteforum.com/c6-c...ng-school.html

 

Oh yes, I installed the headlamp washer and euro tail lights. Switching to japan mode makes everything work and no DRL.

You can see in the photos of the snow driving school the headlamp washers.

a++ Cedric

 

Hi Cedric

After looking at your pictures in the snow school thread I recognize your car and realize you are the Cedric that was getting your car ready to take to France. I didn't recognize your forum handle!

I remember all the work you have done to put in the headlight washers, side marker lights, etc. to get it ready to meet the requirements in France.

Didn't you used to live in Florida???

What is the SCLM? Is that a Steering Column Lock Module? Is that required for a Japan car?

What is the external antenna on a Japan car for?

Anyway, you know far more about all the differences in the cars built to specs for different foreign countries than I do!!

If when you switch to Euro mode the car still recognizes your U.S. sensors, then I guess the different frequencies aren't the problem when you switch to the Japan mode.

So....I don't know why it won't recognize the sensors when you go to the Japan mode.

Good luck with it, but with all the work you've done already I bet you'll get it figured out!!

Bob

 

You should try the "middle eastern" setting. That's usually done with imports here to Germany. The SCLM is mandatory for EU models, but the BCM can't find it.
My C6 has only the DRL's disabled and the Radio tuning changed. Everything else is still like US, lucky me. Today this is no more possible when importing from US.

 

Hi,

The middle eastern configuration leaves the rear turn signals in US mode. So if you install the Euro tail lights you get the dreaded hyper flash.

I am going to install the SCLM as soon as I have time and switch to full Euro mode.

a++ Cedric

 

I'm sure there is a way without installing a SCLM. I'm probably switching to amber turn signal in the back, too. Then I'll ask the guru how he's doing it.
I know some "conversions" are done by simply connecting the rear turn signal to the front via relays. That's very cheap for the importer.

Cheers

 

Hi,

Yes I would be interested but right now as I see it, if you connect to the front, you need to install load resistors for the rear or you will have a hyper flash issue.

Additionally by pulling from the front to the rear, you're putting more load on a circuit that may not have been designed to sustain.

Especially the front turn signals, usually rear turn signal circuits can sustain greater loads for towing purposes.

a++ Cedric

ps: The issue isn't so easy to fix nicely as one might think because GM and my dealer have been unable (unwilling?) to resolve.