According to my handbook -
"The Pop Up Hood system cannot be
reused once it has operated. Have it
replaced by any authorized Lexus retailer
or Lexus authorized repairer, or any reliable
repairer."
"When the Pop Up Hood is operated
●Do not pull the hood lock release lever.
Doing so after the Pop Up Hood has
operated will further raise the hood
and may cause an injury. Do not drive
with the hood raised, as doing so may
block the driver’s vision, possibly causing
an accident. Do not forcibly push
down the hood. As the popped up
hood cannot be lowered by hand,
doing so may deform the hood or
cause an injury. If the Pop Up Hood
has operated, have the vehicle
inspected by any authorized Lexus
retailer or Lexus authorized repairer,
or any reliable repairer. If the Pop Up
Hood has operated, stop the vehicle in
a safe place and contact authorized
Lexus retailer or Lexus authorized
repairer, or any reliable repairer."