Lexus RX 450h Owner's Manual page 409

 Priority is given to the front seats
when: Manual S-FLOW mode is
selected or no passengers are
judged to be in the rear seats when
in automatic S-FLOW mode.
 S-FLOW mode will be disabled
when: A passenger is judged to be
in a rear seat when in automatic
S-FLOW mode.
Depending on the set temperature, opera-
tion in S-FLOW mode may not change as
described above.
When certain conditions are met and pri-
ority is given to the driver's seat only, the
temperature indicator for the front passen-
ger side will turn off.
How the system judges if a passenger is in
the vehicle: P.407
The following S-FLOW modes are
available:
Automatic S-FLOW mode

In this mode, when a passenger is
judged to be in a rear seat, S-FLOW
mode will be automatically disabled.
(P.407)
The indicator will illuminate on the air con-
ditioning control screen when S-FLOW
mode is enabled.
To enable/disable S-FLOW mode and
enter manual S-FLOW mode, select the
S-FLOW mode switch.
How the system judges if a passenger is in
the vehicle: P.407
Manual S-FLOW mode

When the S-FLOW mode switch is
selected, S-FLOW mode will be manu-
ally enabled/ disabled.
� � � � � � � � � � � � � � � � �
5-3. Using the air conditioning system and defogger
The indicator will illuminate on the air con-
ditioning control screen when S-FLOW
mode is enabled.
In manual S-FLOW mode, as the system
does not judge if a passenger is in a rear
seat.
To disable S-FLOW mode automatically by
opening and closing a rear door or operat-
ing the rear air conditioning system
(RX450hL), change to automatic
S-FLOW mode. (P.407)
How the system judges if a passenger is
■
in the vehicle when in S-FLOW mode
In S-FLOW mode, the system judges if a
passenger is in the vehicle as follows:
Front passenger seat: A passenger is
●
judged to be in the front passenger seat
when the system detects an object on the
front passenger seat, fastening of the
front passenger seat belt, changing of the
set temperature for the front passenger
seat or the opening and closing of the
front passenger door. (However, when
only opening and closing of the front pas-
senger door is detected, the system will
judge that a passenger is not in the front
passenger seat after the vehicle speed
reaches approximately 20 km/h (12
mph) or more.)
Rear seats (automatic S-FLOW mode
●
only): A passenger is judged to be in a
rear seat when the system detects the
opening and closing of a rear door or the
operation of the rear air conditioning sys-
tem (RX450hL).
If a passenger is judged to be in the vehicle,
the system will retain the judgement for a
certain amount of time after the power
switch is turned off.
Operation of automatic S-FLOW mode
■
When the system is operating in automatic
S-FLOW mode, if the system detects the
opening and closing of a rear door or the
operation of the rear air conditioning sys-
tem (RX450hL), S-FLOW mode will be
disabled. To enable S-FLOW mode, select
407
5