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Installing tire pressure warning
valves and transmitters
When replacing the tires or wheels, the
tire pressure warning valve and trans-
mitters must be installed to the wheels
which will be installed to the vehicle.
When new tire pressure warning
valves and transmitters are installed,
new ID codes must be registered in the
tire pressure warning computer and
the tire pressure warning system must
be initialized. (→P.403)
■
Replacing tires and wheels
If the ID codes of the tire pressure warning
valve and transmitters are not registered,
the tire pressure warning system will not
work properly. In this case, after driving for
about 20 minutes, the tire pressure warning
light will blink for approximately 1 minute
and then illuminate to indicate a system
malfunction.
NOTICE
■
Repairing or replacing tires, wheels,
tire pressure warning valves, trans-
mitters and tire valve caps
When removing or fitting the wheels,
●
tires or the tire pressure warning
valves and transmitters, contact your
Lexus dealer as the tire pressure warn-
ing valves and transmitters may be
damaged if not handled correctly.
Make sure to install the tire valve caps.
●
If the tire valve caps are not installed,
water may enter the valves of the tire
pressure warning valve and transmit-
ters and the valves may become stuck.
●
When replacing tire valve caps, do not
use tire valve caps other than those
specified. The cap may become stuck.
LS500h_OM_OM50F42U_(U)
6-3. Do-it-yourself maintenance
Initializing the tire pressure
warning system
The tire pressure warning system
■
must be initialized in the following
circumstances:
When the tire inflation pressure is
changed such as when changing
traveling speed or load weight.
When the tire inflation pressure is
changed such as when the tire size
is changed.
When rotating the tires.
After performing the transmitter ID
code registration procedure.
(→P.403)
When the tire pressure warning system
is initialized, the current tire inflation
pressure is set as the benchmark pres-
sure.
How to initialize the tire pressure
■
warning system
1
Park the vehicle in a safe place and
turn the power switch off.
The initialization procedure cannot be
started while the vehicle is moving.
2
Adjust the tire inflation pressure to
the specified cold tire inflation pres-
sure level.
Make sure to adjust the tire pressure to the
specified cold tire inflation pressure level.
The tire pressure warning system will oper-
ate based on this pressure level.
3
Turn the power switch to ON
mode.
4
Press
or
of the meter con-
trol switch to select
401
6
.
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