Lexus ES 250 Owner's Manual page 270

• The air conditioning system is being used
when the ambient temperature is high or
low.
• The battery is undergoing a periodic
recharge.
• The battery is not sufficiently charged,
such as if the vehicle has been parked for
a long time and the battery charge has
decreased, the electric load is large, the
battery fluid temperature is excessively
low or the battery has deteriorated.
• The brake booster vacuum is low.
• The vehicle is stopped on a steep incline.
• The steering wheel is being operated.
• Due to traffic or other circumstances the
vehicle is stopped repeatedly.
• The vehicle is being driven in a high alti-
tude area.
• Engine coolant temperature or transmis-
sion fluid temperature is extremely low or
high.
• The battery fluid temperature is
extremely low or high.
• For a while after the battery terminals
have been disconnected and recon-
nected.
• For a while after the battery has been
replaced.
• Sport mode is selected.
● In the following situations, the engine will
restart automatically if the engine is
stopped by the Stop & Start system. (To
enable stopping of the engine by the Stop
& Start system, drive the vehicle.)
• The air conditioning system is turned on.
• The windshield defogger is turned on.
• The steering wheel is operated.
• The shift lever is shifted to a position
other than D.
• The driver's seat belt is unfastened.
• The driver's door is opened.
• The accelerator pedal is depressed.
• The Stop & Start cancel switch is pressed.
• The vehicle starts to roll on an incline.
In the following situations, the engine may
●
restart automatically if the engine is
stopped by the Stop & Start system. (To
enable stopping of the engine by the Stop
& Start system, drive the vehicle.)
• The brake pedal is pumped or strongly
depressed.
• The air conditioning system is being used.
4-5. Using the driving support systems
• The battery is not sufficiently charged.
• Turn to the dynamic radar cruise control
with full-speed range (if equipped) while
the brake hold system is operating
Stop & Start system operation when the
■
brake hold system is operating
If the engine is restarted automatically by
●
the Stop & Start system when the brake
hold system is operating, the brake hold
system will continue to apply the brakes.
● If the operation conditions of the brake
hold system are no longer met (P.190)
while the engine is stopped by the Stop &
Start system, the brake hold system will
stop operating.
At this time, the parking brake will be
applied automatically and the engine will be
restarted automatically.
Stop & Start system operation during a
■
controlled stop by the dynamic radar
cruise control with full-speed range (if
equipped)
If the engine is restarted automatically by
the Stop & Start system during a controlled
stop by the dynamic radar cruise control
with full-speed range, the controlled stop
will continue. (Resuming follow-up cruising
after a controlled stop:P.244)
Hood
■
● If the hood is opened while the engine is
stopped by the Stop & Start system, the
engine will stall and will not be able to be
restarted by the automatic engine start
function. In this case, restart the engine
using the normal engine starting proce-
dure. (P.179)
● Even if the hood is closed after the engine
is started with the hood open, the Stop &
Start system will not operate. Close the
hood, turn the engine switch off, wait 30
seconds or more, and then start the
engine.
Hill-start assist control
■
● On a steep uphill grade, the vehicle may
roll backward after hill-start assist control
is released. In this situation, apply the
parking brake and operate the brake
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