2017 Lexus IS300h key

5507-3. Do-it-yourself maintenance
IS300h_EE(OM53D89E)
Remove the depleted battery.
Insert a new battery with the “+” termi-
nal facing up.
■Use a CR2032 lithium battery
●Batteries can be purchased at any author ized Lexus retailer or Lexus authorized repairer, or any reliable repairer, local elec trical appliance shops or camera stores.
●Replace only with the same or equivalent type recommended by the manufacturer.
●Dispose of used batteries according to local laws.
■When the card key battery needs to be replaced (if equipped)
The battery for the card key is available only at your Lexus dealer. Your Lexus dealer can replace the battery for you.
■If the electronic key battery is depleted
The following symptoms may occur:
●The smart entry & start system and wireless re mote control will not function properly.
●The operational range will be reduced.
■Certification for the key battery
●Replace only with the same or equivalent type recommended by the manufacturer.
●Dispose of used batteries according to the local laws.
4

565
8When trouble arises
IS300h_EE(OM53D89E)
8-1. Essential information
Emergency flashe rs ..................566
If your vehicle has to
be stopped in an
emergency................................. 567
8-2. Steps to take in an
emergency
If your vehicle needs to
be towed .....................................568
If you think something is
wrong ........................................... 574
If a warning light turns
on or a warning buzzer
sounds.......................................... 575
If a warning message is
displayed ..................................... 581
If you have a flat tire
(vehicles with
emergency tire puncture
repair kit) ..................................... 610
If you have a flat tire
(vehicles with run-flat
tires).............................................. 625
If the hybrid sy stem will not
start ............................................... 626
If the electronic key does
not operate properly ............. 628
If the 12-volt battery is
discharged .................................. 631
If your vehicle overheats ......... 636
If the vehicle becomes
stuck ...............................................641

6048-2. Steps to take in an emergency
IS300h_EE(OM53D89E)
Interior buzzerExteriorbuzzerWarning messageDetails/Actions
Con- tinuous 
The driver’s door was opened when
the shift lever was not in P and the power switch was not turned off.
 Shift the shift lever to P.
Con- tinuousCon-tinuous
The driver’s door was opened andclosed while the electronic key was
not in the vehicle, the shift lever was
not in P and the power switch was not turned off.
 Shift the shift lever to P.
 Bring the electronic key back
into the vehicle.
Once
The electronic key is not detected when an attempt is made to start the
hybrid system.
 Start the hybrid system with the electronic key present.
(Flashes)
(Displayed alternately)
(Flashes)

6058-2. Steps to take in an emergency
8
When trouble arises
IS300h_EE(OM53D89E)
OnceCon-
tinuous
An attempt was made to exit the
vehicle with the electronic key and
lock the doors without first turning the power switch off when the shift
lever was in P.
 Turn the power switch off and lock the doors again.
Once3 times
The electronic key was carried out-side the vehicle and a door other
than the driver’s door was opened
and closed while the power switch was in a mode other than off.
 Bring the electronic key back
into the vehicle.
The driver’s door was opened and closed while the electronic key was
not in the vehicle, the shift lever was
in P and the power switch was not turned off.
 Turn the power switch off.
 Bring the electronic key back into the vehicle.
9 times
An attempt was made to drive when
the electronic key was not inside the vehicle.
 Confirm that the electronic key
is inside the vehicle.
Interior buzzerExteriorbuzzerWarning messageDetails/Actions
(Displayed alternately)
(Flashes)

6068-2. Steps to take in an emergency
IS300h_EE(OM53D89E)
Con-
tinuous
An attempt was made to lock the
doors using the smart entry & start
system while the electronic key was still inside the vehicle.
 Retrieve the electronic key
from the vehicle and lock the doors again.
OnceCon-
tinuous
An attempt was made to lock either
front door by opening a door and
putting the inside lock button into the lock position, then closing the
door by pulling on the outside door
handle with the electronic key still inside the vehicle.
 Retrieve the electronic key
from the vehicle and lock the doors again.
Once
The electronic key has a low battery.
 Replace the electronic key bat-
tery. ( P. 549)
Once
The steering lock could not be
released within 3 seconds of the power switch being pressed.
 Press the power switch while
depressing the brake pedal and moving the steering wheel left
and right.
Interior buzzerExteriorbuzzerWarning messageDetails/Actions
(Vehicles with the entry function)
(Flashes)

6078-2. Steps to take in an emergency
8
When trouble arises
IS300h_EE(OM53D89E)
Once
• When the doors were unlocked
with the mechanical key and then
the power switch was pressed, the electronic key could not be
detected in the vehicle.
• The electronic key could not be detected in the vehicle even after
the power switch was pressed two
consecutive times.  Touch the electronic key to the
power switch while depressing
the brake pedal.
Once
During a hybrid system starting pro- cedure in the event that the elec-
tronic key was not functioning
properly ( P. 629), the power switch was touched with the elec-
tronic key.
 Press the power switch within 10 seconds of the buzzer sounding.

Indicates that:• With the power switch off, the
doors were unlocked and then the
driver’s door was opened and closed;
• The power switch was turned to
ACCESSORY mode without starting the hybrid system; or
• The shift lever was shifted to P
from another position with the power switch in ON mode.
 Press the power switch while
depressing the brake pedal.
Interior buzzerExteriorbuzzerWarning messageDetails/Actions

6268-2. Steps to take in an emergency
IS300h_EE(OM53D89E)
One of the following may be the cause of the problem:
●The electronic key may not be functioning properly. (P. 629)
●There may not be sufficient fuel in the vehicle’s tank.
Refuel the vehicle.
●There may be a malfunction in the immobilizer system. ( P. 86)
●There may be a malfunction in the steering lock system.
●The hybrid system may be malfunctioning due to an electrical problem such
as electronic key battery depletion or a blown fuse. However, depending on
the type of malfunction, an interim meas ure is available to start the hybrid sys-
tem. ( P. 627)
One of the following may be the cause of the problem:
●The 12-volt battery may be discharged. ( P. 631)
●The 12-volt battery terminal connections may be loose or corroded.
( P. 522)
If the hybrid system will not start
Reasons for the hybrid system not starting vary depending on the situation.
Check the following and perfor m the appropriate procedure:
The hybrid system will not start even though the correct starting proce-
dure is being followed. ( P. 219)
The interior lights and headlights are dim, or the horn does not sound or
sounds at a low volume.

6288-2. Steps to take in an emergency
IS300h_EE(OM53D89E)
■Doors
Use the mechanical key ( P. 139)
in order to perform the following
operations:
Locks all the doors
Closes the windows and moon
roof (turn and hold)*
Unlocks all the doors
Opens the windows and moon roof (turn and hold)*
*: This setting must be customized at any authorized Lexus retailer or Lexus autho-
rized repairer, or an y reliable repairer.
■Trunk
Turn the mechanical key clockwise
to open.
If the electronic key does not operate properly
If communication between the electronic key and vehicle is interrupted ( P.
159) or the electronic key cannot be us ed because the battery is depleted, the
smart entry & start system and wireless remote control cannot be used. In
such cases, the doors and trunk can be opened and the hybrid system can be
started by following the procedure below.
Locking and unlocking the doors, unlocking the trunk and key linked
functions
1
2
3
4