key battery Lexus ES300h 2015 Owner's Guide

613
ES350_300h_OM_OM33B36U_(U)
8When trouble arises
8-1. Essential informationEmergency flashers.................... 614
If your vehicle has to be stopped in an emergency ..... 615 8-2. Steps to take in an emergency
If your vehicle needs to be towed .................................. 617
If you think something is wrong ................ 624
Fuel pump shut off system (gasoline vehicles) .................. 625
If a warning light turns on or a warning buzzer sounds ..... 626
If a warning message is displayed ................................ 636
If you have a flat tire................... 659
If the engine will not start (gasoline vehicles) ...................672
If the hybrid system will not start (hybrid vehicles) ............. 674
If the shift lever cannot be shifted from P ...................... 676
If the electronic key does not operate properly ......................677
If the 12-volt battery is discharged (gasoline
vehicles) ..................................... 680
If the 12-volt battery is discharged (hybrid
vehicles) ......................................684
If your vehicle overheats (gasoline vehicles) ................. 688
If your vehicle overheats (hybrid vehicles) ....................... 691
If the vehicle becomes stuck ..............................................697

6568-2. Steps to take in an emergency
ES350_300h_OM_OM33B36U_(U)
InteriorbuzzerExterior
buzzerWarning messageDetailsCorrection procedure

Po we r w a s t u r n e d
off due to the auto-
matic power off
function.
Next time
when start-
ing the
engine
tem>,
increase the
engine
speed
slightly and
maintain
that level for
approxi-
mately 5
minutes to
recharge
the 12-volt
battery.
OnceThe electronic key
has a low battery.
Replace the
electronic
key battery.
( → P. 5 8 4 )

672
ES350_300h_OM_OM33B36U_(U)
8-2. Steps to take in an emergency
If the engine will not start (gasoline vehicles)
One of the following may be the cause of the problem:
●There may not be sufficient fuel in the vehicle’s tank.
Refuel the vehicle.
●The engine may be flooded.
Try to restart the engine again following correct starting procedures.
(→P. 205)
●There may be a malfunction in the engine immobilizer system.
(→P. 8 4 )
One of the following may be the cause of the problem:
●The 12-volt battery may be discharged. ( →P. 6 8 0 )
●The 12-volt battery terminal connections may be loose or corroded.
The engine starting system may be malfunctioning due to an electrical
problem such as electronic key battery depletion or a blown fuse. How-
ever, an interim measure is available to start the engine. ( →P. 673)
If the engine will not start even though correct starting procedures are
being followed ( →P. 205), consider each of the following points:
The engine will not start even though the starter motor operates
normally.
The starter motor turns over slowly, the interior lights and head-
lights are dim, or the horn does not sound or sounds at a low vol-
ume.
The starter motor does not turn over

674
ES350_300h_OM_OM33B36U_(U)
8-2. Steps to take in an emergency
If the hybrid system will not start (hybrid vehicles)
One of the following may be the cause of the problem:
●The electronic key may not be functioning properly. (→P. 6 7 8 )
●There may not be sufficient fuel in the vehicle’s tank.
Refuel the vehicle.
●There may be a malfunction in the immobilizer system. ( →P. 8 6 )
●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 measure is available
to start the hybrid system. ( →P. 675)
One of the following may be the cause of the problem:
●The 12-volt battery may be discharged. ( →P. 6 8 4 )
●The 12-volt battery terminal connections may be loose or corroded.
Reasons for the hybrid system not st arting vary depending on the situa-
tion. Check the following and perform the appropriate procedure:
The hybrid system will not start even though the correct starting
procedure is being followed. ( →P. 212)
The interior lights and headlights are dim, or the horn does not
sound or sounds at a low volume.

677
ES350_300h_OM_OM33B36U_(U)
8-2. Steps to take in an emergency
8
When trouble arises
If the electronic key does not operate properly
■Doors
Use the mechanical key
(→P. 124) in order to perform the
following operations:
Locks all the doors
Closes the windows and moon
roof (turn and hold)
*
Unlocks the door
Turning the key rearward unlocks
the driver’s door. Turning the key
once again within 5 seconds
unlocks the other doors.
Opens the windows and moon
roof (turn and hold)
*
*
: This setting must be customized at your Lexus dealer.
If communication between the electronic key and vehicle is inter-
rupted ( →P. 134) or the electronic key cannot be used because the
battery is depleted, the smart access system with push-button start and
wireless remote control cannot be used. In such cases, the doors and
trunk can be opened an d the engine can be started by
following the procedure below.
Locking and unlocking the doors, unlocking the trunk and key
linked functions
1
2
3
4

6798-2. Steps to take in an emergency
ES350_300h_OM_OM33B36U_(U)
8
When trouble arises
■Stopping the engine
Shift the shift lever to P and press the “START STOP ENGINE” <“POWER”> switch
as you normally do when stopping the engine .
■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. 5 8 4 )
■Changing “START STOP ENGINE” <“POWER”> switch modes
Release the brake pedal and press the “START STOP ENGINE” <“POWER”> switch
in step above.
The engine does not star t and modes will be changed each time the
switch is pressed. ( →P. 206, 213)
■When the electronic key does not work properly
●Make sure that the smart access system with push-button start has not been deac-
tivated in the customization setting. If it is off, turn the function on.
(Customizable features →P. 7 3 0 )
●Check if battery-saving mode is set. If it is set, cancel the function. ( →P. 1 3 3 )
CAUTION
■When using the mechanical key and operating the power windows and moon
roof
Operate the power window or moon roof after checking to make sure that there is
no possibility of any passenger having any of their body parts caught in the window
or moon roof.
Also, do not allow children to operate the mechanical key. It is possible for children
and other passengers to get caught in power window and moon roof.
3

6828-2. Steps to take in an emergency
ES350_300h_OM_OM33B36U_(U)
■Charging the 12-volt battery
The electricity stored in the 12-volt battery will discharge gradually even when the
vehicle is not in use, due to natural discharge and the draining effects of certain elec-
trical appliances. If the vehicle is left for a long time, the 12-volt battery may dis-
charge, and the engine may be unable to start. (The 12-volt battery recharges
automatically during driving.)
■When recharging or replacing the 12-volt battery
●Make sure that the key is not inside the vehicle when recharging or replacing the
12-volt battery. The key may be locked in the vehicle if the alarm is activated.
(→ P. 8 9 )
●In some cases, it may not be possible to unlock the doors using the smart access
system with push-button start when the 12-volt battery is discharged. Use the wire-
less remote control or the mechanical key to lock or unlock the doors.
●The engine may not start on the first attempt after the 12-volt battery has recharged
but will start normally after the second attempt. This is not a malfunction.
●The “START STOP ENGINE” switch mode is memorized by the vehicle. When the
12-volt battery is reconnected, the system will return to the mode it was in before
the 12-volt battery was discharged. Before disconnecting the 12-volt battery, turn
the “START STOP ENGINE” switch off.
If you are unsure what mode the “START STOP ENGINE” switch was in before the
12-volt battery discharged, be especially careful when reconnecting the 12-volt
battery.
CAUTION
■Avoiding 12-volt battery fires or explosions
Observe the following precautions to prevent accidentally igniting the flammable
gas that may be emitted from the 12-volt battery:
●Make sure each jumper cable is connected to the correct terminal and that it is
not unintentionally in contact with any other than the intended terminal.
●Do not allow the other end of the jumper cable connected to the “+” terminal to
come into contact with any other parts or metal surfaces in the area, such as
brackets or unpainted metal.
●Do not allow the + and - clamps of the jumper cables to come into contact with
each other.
●Do not smoke, use matches, cigarette lighters or allow open flame near the 12-
volt battery.

684
ES350_300h_OM_OM33B36U_(U)
8-2. Steps to take in an emergency
If the 12-volt battery is discharged (hybrid vehicles)
If you have a set of jumper (or booster) cables and a second vehicle with a
12-volt battery, you can jump start your vehicle by following the steps
below.Open the trunk lid and remove the 12-volt battery cover.
(→ P. 5 6 2 )
In the event that the trunk opener cannot be used, use the mechanical key to open
the trunk. (→ P. 677)
Connect the jumper cables according to the following procedure:
The following procedures may be used to start the hybrid system if the
12-volt battery is discharged.
You can also call your Lexus dealer or a qualified repair shop.
1
2

6868-2. Steps to take in an emergency
ES350_300h_OM_OM33B36U_(U)
■Starting the hybrid system when the 12-volt battery is discharged
The hybrid system cannot be started by push-starting.
■To prevent 12-volt battery discharge
●Turn off the headlights and the audio system while the hybrid system is off.
●Turn off any unnecessary electrical components when the vehicle is running at a
low speed for an extended period, such as in heavy traffic.
■Charging the 12-volt battery
The electricity stored in the 12-volt battery will discharge gradually even when the
vehicle is not in use, due to natural discharge and the draining effects of certain elec-
trical appliances. If the vehicle is left for a long time, the 12-volt battery may dis-
charge, and the hybrid system may be unable to start. (The 12-volt battery recharges
automatically while the hybrid system is operating.)
■When recharging or replacing the 12-volt battery
●Make sure that the key is not inside the vehicle when recharging or replacing the
12-volt battery. The key may be locked in the vehicle if the alarm is activated.
(→ P. 8 9 )
●In some cases, it may not be possible to unlock the doors using the smart access
system with push-button start when the 12-volt battery is discharged. Use the wire-
less remote control or the mechanical key to lock or unlock the doors.
●The hybrid system may not start on the first attempt after the 12-volt battery has
recharged but will start normally after the second attempt. This is not a malfunction.
●The “POWER” switch mode is memorized by the vehicle. When the 12-volt battery
is reconnected, the system will return to the mode it was in before the 12-volt bat-
tery was discharged. Before disconnecting the 12-volt battery, turn the “POWER”
switch off.
If you are unsure what mode the “POWER” switch was in before the 12-volt battery
discharged, be especially careful when reconnecting the 12-volt battery.

760What to do if... (Troubleshooting)
ES350_300h_OM_OM33B36U_(U)
What to do if... (Troubleshooting)
●If you lose your mechanical keys, new genuine mechanical keys
can be made by your Lexus dealer. (→P. 125)
●If you lose your electronic keys, the risk of vehicle theft
increases significantly. Contact your Lexus dealer immediately.
(→ P. 1 2 6 )
●Is the electronic key battery weak or depleted? ( →P. 584)
●Is the “START STOP ENGINE” <“POWER”> switch in
IGNITION ON mode?
When locking the doors, turn the “START STOP ENGINE”
<“POWER”> switch off. ( →P. 206, 213)
●Is the electronic key left inside the vehicle?
When locking the doors, make sure that you have the elec-
tronic key on your person.
●The function may not operate properly due to the condition of
the radio wave. ( →P. 1 3 4 )
If you have a problem, check the following before contacting your
Lexus dealer.
The doors cannot be locked, unlocked, opened or closed
Yo u l o s e y o u r k e y s
The doors cannot be locked or unlocked