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I purchased a credit card key from Lexus and attempted to program it myself on my Techstream. When I touch the existing key to the ignition switch I get the beep from the car, but when I touch the new credit card key to the ignition switch nothing happens.
I checked the battery it came with and it was completely dead, so I replaced it with a new one and still nothing when I go through the programming sequence and get to the part where I touch the new key to the start button.
The new battery shows about 3.0v when checked with a DMM while installed in the key. It was purchased new from McMaster Carr.
Is there anything else I could do to troubleshoot? I did make sure to follow the Techstream key programming steps to the tee including moving the other key far from the vehicle during programming etc. Thanks for any help!
That happens when the key is not the right unit for your car, or it has already been programmed to a different ECM. That should not happen with a key purchased from Lexus when they have your VIN, but your results match what I have seen with an incorrect key.
That happens when the key is not the right unit for your car, or it has already been programmed to a different ECM. That should not happen with a key purchased from Lexus when they have your VIN, but your results match what I have seen with an incorrect key.
I am thinking the battery is still suspect, sometimes I check it and the voltage is as low as 2.6V. I am going to request a replacement.
However that begs the question is the battery even needed for key programming? If the key is next to the start switch I thought that a dead key would still function.
This is the part that I ordered from Prestige Lexus (didn't provide my VIN). It appeared to be in the original packaging but I already threw it out so I can't say for sure if they sent me the correct part or not. Any idea on how I could verify what the problem is?
There's a big thread in the IS F forum about this. Different model years have different keys. I know this because I ordered one that works with some IS Fs, but it wasn't the right one, and I had to return it for the correct one. Symptoms were identical to your experience. I also got a key with a bad battery. It will program, but it won't work unless you hold it right up to the start switch. I figured it out pretty quickly, and I have a small stash of batteries for these keys since they have a super long shelf life and seem to die suddenly, so everything was fine with a new battery.
Do you know of any way to determine whether or not I have the right key card? The dealership I purchased it through is being unresponsive to my requests and I threw away the packaging that had the PN on it. Still not sure if they sent me the one that I purchased or sent the wrong one by accident.. Does the GSF credit card key have an F logo on it? Ive seen some that do and mine doesn't.
Yes, it comes with the F logo on the battery cover. What is the FCC ID on the key? That's the easy way to tell if it's the right one. This is a picture of the correct key:
Thank you! Looks like I was sent the incorrect part. I received a HYQ14CBB. No F logo on the battery cover.
Unfortunately it was ordered through Prestige Lexus of NJ and I'm past the return window and can't seem to get any customer support through email or phone. I'll try a return request but I might be SOL on this one. I also tossed the packaging which wasn't a smart move on my part.
I ordered a brand new key card from the Lexus dealer and after a few weeks it arrived. They took my car in along with my original key and did everything.
Now the car doesn't start from time to time, it unlocks fine, but doesn't start and I have to keep trying over and over sometimes.