Document ID# 2030163

Subject: Occasional No Fob Detected Message On DIC Or Key In Reminder When Key Fob Outside Of Vehicle - keywords chime chirp fob horn message no program RCDLR RKE transmitter #PIC4642 - (10/15/2007)

Models: 2005-2008 Chevrolet Corvette

Condition/Concern:
Some customers may comment of an occasional "No Fob Detected" message displayed on the DIC when the fob is located somewhere on the driver's seat. They also may comment that the fob reminder (3 horn honks) is heard when exiting the vehicle with the key fob.
This is because the original RCDLR software does not adequately cover the driver's seat and it can also detect the fob when it is slightly outside of the driver's door.

New software will add a new zone to better cover the driver's seat, and it will also add a 2 second delay after the door closes before checking for the fob on the interior. This could affect all vehicles built prior to October 2007.

Recommendation/Instructions:
Important: Prior to programming per the information below, the Radio and HVAC Fuses MUST be removed and the ignition must be in "Key On Engine Off Mode"
The radio and HVAC fuses can be located in the BCM fuse block on the passengers floor electrical center. One of the fuses is labeled RDO/S'BAND/VICS and the other is labeled HVAC/PWR SND.

Program the RCDLR with revised software using TIS-2-WEB "Pass Through" method. When programming, it is required to select "Replace and Reprogram ECU".

If programming phase does not finish successfully and the RCDLR appears to be in a "locked up" state do not turn off the ignition, the RCDLR can be reset by removing fuse 11 in the UBEC for 30 seconds.
Reinstall the fuse. Make sure the Radio and HVAC fuses are pulled!! Attempt programming the module again. If the ignition was turned to OFF after the "locked up" condition occurred, it's possible to continue programming - simply add the VIN manually in TIS.

Use Labor Operation Number R9723 with a Labor Time of 0.4

Please NOTE the following two items: DO NOT REPLACE THE MODULE - JUST REPROGRAM IT. ALSO FOB PROGRAMMING AND TPM LEARN IS NOT REQUIRED.

For Model years 2005-2007, use software version 25927325.

For Model Year 2008, use software version 25927326

This has happened to me quite often. However I have found that if the FOB is in my right pocket it generally will pick it up. I haven't noticed it since the reprogram of the ECM but I haven't really driven it much.

I wonder if this issue was addressed when they re-flashed my ECM?

If dealer only did updates to the PCM then no.

As the bulletin above gives the RDLCR software version you would have to have someone with a Tech-II query the module and see what version it has now.

I'm not sure if I want to take it in though since it sounds like they also reprogram the ECM.

If there have been any changes in the last few weeks I would lose the tune again correct?

I'd instruct the dealer to ONLY make updates to other modules in the car and not the PCM again.