jaa1992

Following the relearn procedure the horn never chirps!
Has had a "Service TPMS" message on the display for several months.
I was at the tire store and asked them to relearn the system after plugging a tire.
The TPMS system will not go into learn mode. Tech said his equipment could interrogate all 4 sensors so I would assume the sensors are still OK.

OK, what are the trouble shooting steps and where is the module in the car?

Thanks!

dgrant3830

Have you looked at the whatever fuse for the TPMS? Were any of the sensors working before replacement?

SDLS1Rider

Are those the original sensors? If so the batteries may be too weak to reset?

jaa1992

If I knew where the fuse was I'd be able to check it. Chevy has this nasty habit of placing fuses in hard to find locations. On my 92 there are fuses behind the radio even.

Sensors were working before a turn signal bulb was replaced.

dgrant3830

There are two fuse boxes therefore check all of them.

toddk

Which is it? If you can see the option in the DIC to start the relearn process and start it but it just times out, that means that you can go into learn mode, but it just does not learn. I assume you sit at the DIC prompt asking for the LF tire, but it times out. If the option is not there at all, that would be "not going into learn mode", a different problem.

The fact that you can see "TPMS relearn" in the DIC implies that the RFA is being seen by the BCM. Furthermore if your key fobs are working (they are working, right?) the RFA is receiving a signal and passing it to the BCM which rules out cabling issues (power and OBD serial bus). There is only one receiver in the RFA which listens to both TPMS and key fobs on the same frequency.

Did you try disconnecting the battery terminal for 10 mins, then reconnect and retry?

First thought. I had trouble getting my RFA to receive TPMS messages when the OBD bus was "busy" with several other messages. These messages were generated by the toneau cover and doors being open, but mostly by a trickle charger on my battery. You might try the normal sync again having all those conditions addressed.

I also agree with 8VETTE7, a good strong magnet on the barrel of the tire just behind the stem for 5 seconds should trigger the horn. If the tire tech queried your TPMS with his TPMS tool and your DIC was in learn mode, the horn should have chirped and moved to the next tire. If he was just querying without the DIC ready, the RFA would just ignore it.

Todd

lucky131969

8VETTE7 provided good advice .....post your codes.

Pull Up Now!

2013-I am having this same problem with a 2000 Vette. I replaced all the batteries in the sensors, but the TIRE TRAINING mode won't switch over to TIRE LEARNING after pressing RESET.

When the batteries were dead, the DIC would continuously revert back to SERVICE TPMS while driving. Now that the batteries are good, the DIC doesn't revert anymore. BUT, when I start the car anew, then the SERVICE TPMS message returns until I reset it. The tire data is all blank, by the way.

Like the originator of this thread, the system won't go into relearn mode. What was the resolution of JAA1992's problem? Sounds like his was identical to mine.

Pull Up Now!

Since the DOOR RECEIVER is the same receiver as the TPMS, and since my door locks work with the FOB, should I assume the fuse is ok? Seems logical.

Pull Up Now!

I have an update, but still no solution. I pulled the DTC codes from the Driver's Info Center. They are:
1176H
2282H
1064H
2283H
2285H
BO-No RFA Comm

OK, the RFA Comm is the Remote Function Actuation receiver/computer. So this fault could be why the car won't go into TIRE TRAINING mode. But my remote key FOBS all work!!!! Are these different receivers that the RFA receiver? I didn't think so.

Pull Up Now!

No, nothing is wet. But the Vette is stored all winter long at a lake house. So, at times, I'd imagine the humidity level is pretty high.

So, here's the update. I did the full battery replacement, as I mentioned, myself. The DIC stopped giving me repeated warnings, but just a warning on startup. So, something changed.

I located the Remote Function Sensor module, above the left rear wheel, inside the car. I unplugged and replugged it several times. Started the car, and immediately got all 4 tires pressure info flawlessly. I can only assume I somehow reset it, or restored an oxidized connection. It all works now.

FOR THOSE OF YOU WHO ASSUME IF YOUR KEYFOB IS WORKING, THE RSA IS TOO, THAT IS WRONG. My remote key has worked fine all through this ordeal.

Bill Curlee

The door control modules have nothing to do with the FOB or Tire Pressure sensors. (TPS)

The REMOTE FUNCTION ACTUATOR (RFA) module (located in the rear near the drivers side rear speaker communicates with the FOBs and TPS/s The RFA transmits the data to the BCM and the BCM uses that data to display tire pressure data and FOB actions. The BCM actually operates the locks, the lights and trunk latch and all the remote functions.

I agree.. If you have FOB Function, the RFA is working. The newer C6 cars need a TPS interrogator to program the TPS. As far as I know, that will not work on a C5 TPS. We use a magnet where as the magnet will NOT work on a C6