Lexus is300 2021, Service Manual

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145
4-2. Driving procedures
4
Driving
system warning light is not illuminated.
If the automatic release function does not
operate, manually release the parking
brake.
■
If “Parking Brake Temporarily Unavail-
able” is displayed on the multi-informa-
tion display
If the parking brake is operated repeatedly
over a short period of time, the system may
restrict operation to prevent overheating. If
this happens, refrain from operating the
parking brake. Normal operation will return
after about 1 minute.
■ If “EPB Activation Stopped Incom-
pletely” or “Parking Brake Unavailable”
is displayed on the multi-information
display
Operate the parking brake switch. If the
message does not disappear after operat-
ing the switch several times, the system may
be malfunctioning. Have the vehicle
inspected by your Lexus dealer immedi-
ately.
■
Parking brake operation sound
When the parking brake operates, a motor
sound (whirring sound) may be heard. This
does not indicate a malfunction.
■ Parking brake indicator light
● Depending on the engine switch mode,
the parking brake indicator light will turn
on and stay on as described below:
IGNITION ON mode: Comes on until
the parking brake is released.
Not in IGNITION ON mode: Stays on
for approximately 15 seconds.
● When the engine switch is turned off with
the parking brake set, the parking brake
indicator light will stay on for about 15
seconds. This does not indicate a mal-
function.
■
Parking the vehicle

P.244
■ Parking brake engaged warning buzzer
A buzzer will sound if the vehicle is driven
with the parking brake engaged. “Parking
Brake ON” is displayed on the multi-infor-
mation display.
■ Warning messages and buzzers
Warning messages and buzzers are used to
indicate a system malfunction or to inform
the driver of the need for caution. If a warn-
ing message is shown on the multi-informa-
tion display, read the message and follow
the instructions.
■
If the brake system warning light comes
on

P.337
■ Usage in winter time

P.243
WARNING
■ When parking the vehicle
Do not leave a child in the vehicle alone.
The parking brake may be released unin-
tentionally and there is the danger of the
vehicle moving that may lead to an acci-
dent resulting in death or serious injury.
NOTICE
■ When parking the vehicle
Before you leave the vehicle, shift the
shift lever to P, set the parking brake and
make sure that the vehicle does not
move.
■ When the system malfunctions
Stop the vehicle in a safe place and
check the warning messages.
■ When the parking brake cannot be
released due to a malfunction
Driving the vehicle with the parking
brake set will lead to brake components
overheating, which may affect braking
performance and increase brake wear.
Have the vehicle inspected by your
Lexus dealer immediately if this occurs.