mk416

For those who followed my accident post, I just got my car back. Yay!

So now I have a spare key fob that works for starting the car (by putting the fob close to the start button), but it does not unlock/lock/pop trunk and isn't detected by the car when I do drive. Replaced the battery, still no working. What could be wrong? Does Lexus does a two-step programming with this key fob?

mk416

Bump with updates:

Dealer looked and said they will need to erase all existing keys within the module and try to program a new key in. $370...for one key.

And that's if the module is working. Otherwise, it's $2000+ for a new computer.... any ideas?

j3ff

Do your other fobs work?

mk416

The primary one (with F logo) was working, but it was stolen.

j3ff

Hmm. Well I can tell you that programming the fob is fairly easy assuming you have techstream. I wouldn't call it a two step programming but the process does require you to have the fob on the start button and then on the passenger seat.

Also, if I remember correctly, the car holds up to 5 keys in memory; it's strange if the fob was working and then stopped. If all 5 slots are full you would have to wipe all and then reprogram all keys again or in your case, just the one.

mk416

The dealer is working on wiping out all keys and assigning a new one to me ($370 with a fob minus the valet key), so I think you are right. They did also caution that I may need to replace the key module for $2000, which I'd tell them to go to hell and send my car to a capable locksmith instead.

Will report back, but it is strange that such a simple task cannot be done. And how exactly do you damage a module via programming? As far as software goes, I know enough that memory partitioned for specific allocation can easily be "reset" via flashing aka systemic wipe. So I am not sure how this module can be damaged via programming as the dealer cautioned.

ISFPOWER

iTrader: (20)

just pay the 370.

mk416

Can't pay since dealer still hasn't given the car yet. Been on loaner since Friday

mk416

Update:

Dealer said the ECM or the immobilzer is "locked out" due to attempted programming from before. What.

Found a procedure that may help with this, but not sure if it's applicable. Any help?

http://www.revbase.com/BBBMotor/TSb/...dPdf?id=196186

Basically a SB from Lexus' TSI in 2016 that's applicable up to 2017 (revised 2).