Hello, Good morning All. I have trouble with onity locks ht28 rfid. The case is, the reader is not respond with all key(guest, master) Only will opened with ppi device from onity. I have try to initialize, update, changed the batteries, but not working. Maybe anyone can give a suggestion and solution. Thank you Ferdi

SOURCE: My GMC Envoy 2005 has

Hey. Your problem look to be a battery concert.
if you are sure of the battery is Ok.
Remove the Battery terminal inspect and clean.
And put back the teminals. Tight a little hard.
because one of the problems on this kind if vehicles are the battery conncetions. That came in misscontact.
After all of this . Check all the fuses Include the MEGA FUSES.
Replace as need. with the same rating.

Check the Red wire going to the fuse block. If is nessesary
Go to the autopart and buy a test light.

OK.... I hope this can be a start prosses to fix your car.

Ginko

• 19396 Answers
• Posted on Sep 13, 2008

SOURCE: porsche key fob

If the key had gone faulty, the key code must be re programmed on the vehicle computer. This can be done only using a PIWIS tool, available at the dealer or at a qualified Porche garage.
Try also the following reset:
turn ignition on,
turn off.
remove the transponder from the column
push any button on the fob within 6 seconds.
This procedure will reset the key synchronizing again with the vehicle computer.

SOURCE: Change Batteries in my Remote door, (lock/unlock) and trunk opene

is the battery installed in the right orientation?

SOURCE: Key remote battery replacement

Make sure that you have the Batteries Installed Correctly. If these Remotes take the Flat Round Batteries, Look and see if it tells you inside the Remote which way to Put the + On the Battery. Most of them have the + at the Top during Install. If it takes the Small Regular Battery, Looks like a Smaller AAA. You will need to Push the Connectors in a Bit Before you Install the Battery to make Sure that It connects with Both ends. Please Rate my Response, I need all the Help that I can Get! Thanks!

SOURCE: Remote Door Lock/Unlock will not work.

At first look, I would have guessed that your battery in the door opener was dead, but that is not the case. I suggest driving to a nearby Chevy dealer and ask one of the salesman if he/she can help. They have always been helpful to me. If not try another one as they are in business to sell not only cars, but service also. They will be your best bet to fixing it. :D