lakwill

This morning when I shifted to drive mode, the door locks remained unlocked. When I parked the car and tried to lock by touching the door handle, it didnt lock. Then I tried using the hand remote and it didn't. Finally, I had to manually lock each door.
Any idea why it happened?
Thanks.

JerryM

Good information in this thread below. I would also check all your fuses.

https://www.clublexus.com/forums/es3...007-es350.html

jcat_350

out of curiosity, have you ever replaced the battery in your key fob?

garsarno

Ditto weak battery in the remote.

lakwill

The FOB battery was replaced recently. Thanks.

garsarno

This may sound stupid, but I seem to remember the same problem years ago on my 2007. Went away after replacing batteries in both fob.

jcat_350

that being the case, i'd agree the lock brain may be to blame. take it in and have them put a known good part in and make sure it works before you commit to buy it.

lakwill

I noticed that the problem is when there is dampness/wet weather in the morning. The problem is gone when the weather is warm. It happened twice so far. I will ask the dealership when I visit them next time.

lakwill

My door locks won't lock and I have to do it manually. The dealership says that the lock brain needs to be replaced with an estimate of about CAD$ 2,000. Is there a cheaper way to do it? Thanks.