Has anyone replaced their RDCLR (aka RFA) module? This is the module that receives the signals from the FOB and the tire pressure sensors and controls all the remote locking functions.

Here are my symptoms:

1. The DIC says “Service TPMS”. As I scroll the DIC readout, every tire says “xxx psi” rather than a numerical value. (If a single pressure sensor was defective, the readout would be “xxx psi”, and the other 3 corners would state their numerical values, but this is not the case, so I presume the sensors are not defective and that the RDCLR is not receiving a signal from any tire. And I doubt that recalibrating the TPMS will help because some days I don’t have this issue at all and I see numerical values at all four corners.)

2. When I stop and turn the ignition “off”, the engine will stop but the DIC will say “No FOB, run or off?” I press the dash button a second time and the DIC message disappears.

Both 1 and 2 above occur intermittently/sporadically. Some days no problem. When it happens, they usually occur on the same trip, but not always. This leads me to believe that the RDCLR is defective and not receiving signals. BTW I replaced the battery in my FOB, and the FOB buttons function normally.

Also, as I exit the car with the FOB in my usual pocket, the car beeps 3 times. (Normally this only happens when I forget the FOB and leave it in the car and close the door after exiting. This is the normal GM design) But recently the car beeps at me even though I have the FOB in my pocket outside of the car after I close the door. This problem only started recently, followed by issues 1 and 2 above. Again, I suspect the RDCLR is not receiving a signal from the FOB. (BTW I read a post on CF of a GM bulletin with modified software to resolve the issue of the RDCLR not recognizing the FOB while the driver/FOB is seated in the car. My issue only came up recently, so I doubt the tweaked software will fully resolve my issues.)

Can anyone confirm that the RDCLR is located behind the driver seat? I have a vert.

Is this a plug and play replacement, or does the RDCLR need to go thru a Tech II “handshake” to interface with the BCM? (I read this on another Vette forum.) The “handshake” I refer to is not to be confused with the routine programming of the FOB and the TPMS.

My car is a 2007 and the warranty just expired. I can replace the RDCLR myself as long as a handshake is not required. I want to avoid a visit to the dealership.

 

Regarding your "Service Tire Monitor" message and "xxx psi" readouts for all tire pressures.

Have you put on new tires or wheels lately?

Do you have a second set of wheels/tires/sensors in your garage?

You're correct that what we call the TPMS is actually part of the RCDLR (Remote Control Door Lock Receiver) module. They both use the same radio receiver to pick up signals from both the fob and the tire pressure sensors.

I doubt your RCDLR is bad - however it's a computer, and anything is possible!

I would first suspect that a ground wire is loose and making signal reception intermittent.

The RCDLR module is in the top of the center console behind the radio and hazard flasher area. There's an antenna that talks to the fob in that area as well, and I'd check the wiring harness connector to that antenna.

If you do replace the RCDLR you'll definitely need a Tech 2 to program it to your car, and you'll need to do either the 10 minute or 30 minute theft detterent system programming.

So.....before I started to replace the RCDLR module, or before checking all the other antennas, I'd start looking for loose ground wires or wiring harness connections in the area around where the RCDLR and the instrument panel antenna mount in that area in the top of the center console.

Good luck!!

Bob

 

Nope, haven't changed tires/wheels recently.

I will pull the console to check ground, harnesses, wires. I recently snaked a wire nearby that area, but I think my issues started before that though. Another thing, my vert has a speaker located behind the driver seat on the storage shelf. I have been hearing crackling/popping recently. I wonder if there are connection/wiring issues in that area nearby the RDCLR. I will check tonight. Anybody else have suggestions, keep them coming.

 

We have replaced a few RCDLR's recently. Also if you have a "loc Pick" iPod adapter thing, that may be the source of the problem. We have ripped a handfull of those out recently for causing symptoms similar to a RCDLR issue.

 

RR, thanks for your response.

A few months ago I did install the GM Ipod adapter. Since it is a GM product, I wonder if it had gone thru an RF-interference testing before being released to the public. Anybody out there have the GM adapter and is experiencing the same issues I have? That is the first thing I am going to try: disconnecting the Ipod module. (I will link this post to the CF posts re Ipods.)

Update: I disconnected the harness at the GM PAL module. No success. The DIC is still showing "Service TPMS" and "No FOB Detected" at shutdown.

 

Ive got almost the same issue intermittantly. Only one of my tires reads 0psi...i think its the TPMS. However, I do get a clicking noise like when you get in or out of the car like it is not reading the FOB, but the car will start. The clicking noise seems to be intermittant but when it comes, it will click when applying brakes, turn signals, rolling windows up and down, etc. Im thinking bad relay or.....something else you may want to check...a bad FOB. If your car came with 2 FOBs, try the second. See if the problem still exists. Also, you may want to get your TPMS recalibrated. normally you can swing by discount tire and they will do it for free as a customer service thing. Let me know what you find cause I would be interested too.

 

I was getting weird FOB sensing problems. My battery was starting to go south so I changed it.

Now the issues have not returned. It was either the battery OR disconnecting the battery that solved it.

Try just disconnecting the battery and reconnecting it. See if that helps. Hell,, it cant hurt.

BC

 

The GM Pal will not cause the same issues. The "LocPic" one is complete garbage though.

 

Replaced the battery in Feb. Problem has been more apparent afterwards. Sometimes car wont start, gives No Fobs Detected in the DIC. Sometimes I can actually take my keys out of my pocket, put them in the ashtray or passenger seat and POOF...starts. This will also happen whether my iphone is with me or not, so I have ruled out interference. But like I said, I think mine issue is the Fob and it could also be others. Unfortunately, the Corvette tax on a Fob is ridiculous (at least in my opinion).

 

I'm having very similar issues to you. Did you get past yours? If yes - how did you resolve it? Was it a grounding issue?

My problems started soon after installing http://www.kawal.net/PAL%20Rev%202.htm - but I've been assured by them that their unit would not cause the issue. And like you I tried removing it but that made no difference. But I wonder if the power cord itself that I ran behind the radio, to where the PAL is next to the fuse box, may be the culprit? But if the cable isn't plugged into the PAL I don't know why there would even be a power flow and subsequent interference.