If a warning light turns on or a warning buzzer sounds...
Calmly perform the following actions if any of the warning lights turn on or flash. If a light turns on or flashes, but then turns off, this does not necessarily indicate a malfunction in the system.
Stop the vehicle immediately. Continuing to drive the vehicle may be dangerous.
The following warning indicates a possible problem in the brake system.
Immediately stop the vehicle in a safe place and contact your Lexus dealer.

*: Parking brake engaged warning buzzer:
A buzzer will sound if the vehicle is driven at a speed of approximately 3 mph (5 km/h) or more.
- Stop the vehicle immediately.
- Have the vehicle inspected by your Lexus dealer immediately.
- Have the malfunction repaired immediately.
See also:
If the vehicle battery is discharged
If you have a set of jumper (or booster) cables and a second vehicle with a 12
volt battery, you can jump start your Lexus by following the steps below.
Open the hood.
Connecting the jumper cab ...
Turn Signal Lever
1 Left turn signal
2 Right turn signal
3 Lane change to the right (move the lever partway
and then release it)
The right hand signals will flash 3 times.
4 Lane change to the left (move the l ...
