The DIC on my '99 says "Service Tire Monitor System". The dealer says the receiver is bad and wants over $300 to replace ($150+ for the part). Does anyone know the part number and who has the best price? Also, would appreciate any info on how to replace it (heard it was in the trunk area over the rear driver-side wheel but can't find it).

Thanks

 

I think the batteries on the 99 sensors have a life span of about 6-7 years. Most likely, you need new sensors in the wheels.
jeff

 

Thanks, but I've heard that bad sensors produce a different message (?)

 

How did they determine that the receiver is bad?

 

I don't know, but when I go under 'gauges', the tire pressure readings for all 4 tires is 'blanks', no pressure readings. I would think that if one of the sensors was bad, the other sensors would still show a reading. I don't think all the sensors would go bad at the exact same time (?).

 

Is this before or after you drove for a while?

 

Basically, as soon as I began getting the "Serv Tire Mon Sys" message, all the tire pressures showed no reading. The problem has been constant ever since.

I'm also sick of having to hit 'reset' every time I start the car!

 

The receiver is a pretty bullet proof part. Are you able to get a pressure reading on any of the tires on the DIC? If you can get a pressure indication on any of the tires, it isn't the receiver. More likely it is the monitor/transmitter. Check the DIC and it will tell you which one(s) are not transmitting.

This is about the time for batteries to start going away on a '99 and some on the forum have been able to put new batteries in the sensor with minor surgery and soldering. Check the local Corvette club or make friends with the parts guy at the dealership and see if they'll sell you the sensor at a discount. Should be in the $100 range. Take it to a tire store that you trust and ask them to install it. Should cost $25 or so since they will have to remove the wheel, break the tire off the rim, remove the sensor, and install the new one. Be sure to buy an installation kit for the sensor as well (o-ring, nut, cap). It usually isn't necessary to re-balance the tire UNLESS the tire was broken down completely off the rim and rotated on the rim. If that happens, it would be a good idea to rebalance the assembly. Search this forum for sensor training. You'll need a strong magnet. I got mine at Ace Hardware. Rare earth magnet about 1/2" diameter, 1/8" thick, I think three of them for $3.00 or so, will do nicely. Others have used old speaker magnets. Training s relatively simple, just need to be sure to follow the sequence exactly and in the order given so the receiver indicates the pressure for the correct tire.

Charlie

 

I'm not getting a reading on any tires - just shows blanks for all 4. Prior to getting the "Serv Tire Mon Sys" message, I was getting readings on all 4.

Thanks for all the info on replacing the sensors - I'm sure that's coming soon but I don't think that's my current problem.

 

Correct diagnosis. Find the part elsewhere and swap it out.

Charlie

 

Anyone know where the receiver is located?

 

You can get to it from the rear. From the trunk or hatch, it's located above the driver rear wheel well, near the rear speaker. It hangs suspended with rubber pieces similar to the way the airbox is attached to the radiator shroud.

 

BTW, my 99 has done this intermittently since I've owned it. All the sensors have been replaced without result. I also have intermittent key FOB failure.

Since the FOBs and tire sensors use the same receiver, this leads me to believe replacing it might fix it. I also found that this part was updated by GM due to some problems with cold temperatures. The funny thing is my car ONLY has problems in hot weather, I can go all winter without an issue...

Long story short, if you have FOB problems also, it's probably a good idea to replace the receiver.

Ironically, the receiver is far cheaper to replace the the tire sensors...

 

I pulled up the carpet over the driver rear wheel but I still don't see it. What else to I need to remove to get to it? Thanks

 

Realize I have a hardtop. I was able to remove it without removing the trim panel completely. You may not be so lucky. Putting it back was more difficult as a result. It is directly opposite the fuel door. It is hanging (ie mounted on the underside of the panel that covers the rear speaker and B pillar. Removing the panel completely will require removing the upper seat belt anchor bolt. I was able to remove the trunk side of the panel enough to get my hand in there, and feel for it. It is a silver rectangular box about 4*6*1 in.

 

I'll give it a try, thanks!

 

The TPMS is monitored by the serial buss and will give a DTC if it isnt playing correctly. Take a look at the DTC Codes and see what they tell you. It is also fused so check the fuses.

Here is how to read your DTC Codes:

This is the absolute best C5 Diagnostic Trouble Code (DTC) web site!!!

http://www.corvettedoctor.com/Code_Main.html
http://www.corvettedoctor.com/index.html


Go to “technical data base” and then to “Corvette ECM Computer Codes”. Then select your year car. Read the instructions and then scroll down to the "READ MORE" window to view the code definitions.\

Here is another very good site:

http://www.obd-codes.com/trouble_cod...d-ii-codes.php

Make sure to include the H or C suffix!!


Write down and post your DTC’s Then clear them ALL!

Sound effects are cool too! 



BC

 

Thanks Bill, I'll check that out. Wouldn't the dealer have done that? They say it's the receiver. Do you know if the receiver is located in the same place in a coupe as it is in a hardtop?

 

Man,,,you keep pronouncing that wrong!! There called the STEALERSHIP not the Dealership. They would sell you a whole new frigging interior if they thought that they could get away with it!! My honest opinion, I doubt that that module is bad,,,, but thats my 2 cents. The old saying goes, check twice, spend once!

I'm not saying that the Remote Function Actuator (RFA) module isn't bad but,, I would do everything that I could to make sure that your not wasting cash on stuff that you don't need to. Check the easy nickel dime stuff like fuses, the connector to the module, and the codes. Post the codes for further help. If you receive a NO COMMS DTC reading, it could be a fuse or another module causing that module to read bad. You just need to exhaust all the other options before you replace expensive stuff.

Either way, once you find the module, removing it your self and purchasing a module from a less expensive parts warehouse like the GM Parts Ware house " http://forums.corvetteforum.com/show....php?t=1726876 " will save you a TON of money!! E-mail Gene and he will help you out if you really do need a RFA module.

Yes,, the module is located in the same place on all C5's. Look behind the plastic close out panel that contains the driver side rear speaker grill

 

I checked the DTC codes and the only 'current' code is C2120 under BO-RFA. What's strange is that C2120 isn't listed on the code lists. Any idea what this code means?

Just found code C2120 on a different list:

C2120 TPM System Malfunction (No Sensors Received)

Does this mean the RFA is bad? Is that the "receiver"?