stop start Lexus HS250h 2010 Using the Bluetooth audio system / LEXUS 2010 HS250H (OM75006U) Owner's Manual

5
When trouble arises
535
5-2. Steps to take in an emergency
To change “POWER” switch modes: Within 10 seconds of the
buzzer sounding, release the brake pedal and press the
“P
OWER” switch. Modes can be changed each time the switch is
pressed. ( P. 1 4 8 )
To start the hybrid system: Press the “POWER” switch within 10
seconds of the buzz
er sounding, keeping the brake pedal
depressed.
In the event that the hybrid system still cannot be oper
ated, contact your
Lexus dealer.
■Stopping the hybrid system
In the same method as the normal hybrid system stopping procedure, completely
stop
the vehicle and then press the “POWER” switch.
■Replacing the key battery
As the above procedure is a temporary measure, it is recommended that the elec -
tronic key battery be replaced immediately when the battery is depleted. 
(  P. 4 5 3 )
■When the electronic key does not work properly
Make sure that the smart access system wi th
push-button start has not been deacti-
vated in the customization setting. If it is off, turn the function on. 
(Customizable features  P. 5 7 2)

5
When trouble arises
541
5-2. Steps to take in an emergency
If your vehicle overheats
Correction procedures
■If the engine coolant temperature warning light comes on or flashes
Stop the vehicle in a safe place an d turn of
f the air conditioning
system.
Check to see if steam is coming out from the engine area.
If you see steam: 
Stop the hybrid system. Carefu lly lif
t the hood after the steam
subsides and then restart the hybrid system.
If you do not see steam:
Leave the hybrid system operating and carefully lift the hood.
Remove the engine compartment cover. ( P. 4 2 3 )
Check to see if the cooling fans are operating.
If the fans are operating: 
Wait until the high engine coolant temperature warning light goes
of
f and then stop the hybrid system.
If the fans are not operating: 
Stop the hybrid system immediately and call your Lexus dealer.
The following may indicate that your vehicle is overheating:
●The high engine coolant temperature warning light comes on or
flashes: 
The engine may be overheating.
● “HYBRID S
YSTEM OVERHEAT” is sh own on the multi-information
display: 
The power control unit may be overheating.
Follow the correction procedure as described below.

5
When trouble arises
545
5-2. Steps to take in an emergency
If the vehicle becomes stuck
■When changing the shift position
Depress the brake pedal and ensure that t
he vehicle has stopped completely
before changing the shift position. Failure to do so could cause the rejection func -
tion to be activated, canceling the shift position change, or causing the shift position
to change to N automatically.
CAUTION
■When attempting to free a stuck vehicle
If you choose to rock the vehicle back and forth to free it, make sure the surround-
ing area is clear to avoid striking other vehicles, objects or people. The vehicle may
also lunge forward or lunge back sudden ly as it becomes free. Use extreme cau-
tion.
■When shifting the shift lever
Be careful not to shift the shift lever with the accelerator pedal depressed. 
This may lead to unexpected rapid acceleration of the vehicle that may cause an
accident resulting in death or serious injury.
Carry out the following procedures if the tires spin or the vehicle becomes
stuck in mud, dirt or snow:
Apply the parking brak e, change the shift position to P and
stop the hybrid system.
Remove the mud, snow or sand from around the stuck tire.
Place wood, stones or some othe r material under the tir
es to
help provide traction.
Restart the hybrid system.
Make sure to change the shift position to D or R, r
elease the
parking brake, and then care fully depr
ess the accelerator
pedal.
Turn off the TRAC and VSC systems if these functions are hamper -
ing your attempts to free the vehicle. (  P. 2 2 6 )