2015 LEXUS RX450h battery

TABLE OF CONTENTS Index
64-1. Maintenance and care
Cleaning and protecting
the vehicle exterior................... 634
Cleaning and protecting
the vehicle interior .................... 637
4-2. Maintenance
Maintenance requirements .... 640
General maintenance ................ 643
Emission inspection and
maintenance (I/M)
programs ...................................... 647
4-3. Do-it-yourself maintenance
Do-it-yourself service
precautions ................................. 648
Hood................................................... 651
Positioning a floor jack............... 652
Engine compartment.................. 654
12-volt battery................................ 664
Tires ................................................... 670
Tire inflation pressure ................. 679
Wheels............................................. 683
Air conditioning filter ................. 685
Electronic key battery ................ 687
Checking and replacing
fuses ............................................... 689
Headlight aim................................. 705
Light bulbs ...................................... 708 5-1. Essential information
Emergency flashers..................... 724
If your vehicle needs to be
towed.............................................. 725
If you think something is
wrong ............................................. 732
5-2. Steps to take in an emergency
If a warning light turns on
or a warning buzzer
sounds... ........................................ 733
If a warning message is
displayed ....................................... 743
If you have a flat tire..................... 764
If the hybrid system will not
start ................................................. 777
If the shift lever cannot be
shifted from P .............................. 779
If you lose your keys ................... 780
If the electronic key does
not operate properly ................ 781
If the vehicle 12-volt battery
is discharged ............................... 784
If your vehicle overheats .......... 788
If the vehicle becomes
stuck................................................ 793
If your vehicle has to be
stopped in an em ergency ...... 7954
Maintenance and care 5
When trouble arises

23Installation of a mobile two-way radio system The installation of a mobile two-way radio system in your vehicle could affect elec-
tronic systems such as: ●
Hybrid system●
Multiport fuel injection system/sequential multiport fuel injection system●
Cruise control system●
Dynamic radar cruise control system●
Anti-lock brake system●
SRS airbag system●
Seat belt pretensioner system
Be sure to check with your Lexus dealer for precautionary measures or special
instructions regarding installation of a mobile two-way radio system.
High voltage parts and cables on the hybr id vehicles emit approximately the same
amount of electromagnetic waves as the conventional gasoline powered vehicles or
home electronic appliances despite of their electromagnetic shielding.
Unwanted noise may occur in the reception of the mobile two-way radio.
Vehicle data recordings Your Lexus is equipped with several soph isticated computers that will record cer-
tain data, such as:
•Engine speed
• Motor speed
• Accelerator status
•Brake status
•Vehicle speed
•Shift position
• Hybrid battery (traction battery) status
The recorded data varies according to the vehicle grade level and options with
which it is equipped. Furthermore, these computers do not record conversations,
sounds or pictures.

27CAUTION■
Hybrid battery (traction battery)
Never resell, hand over or modify the hybrid battery. To prevent accidents, hybrid
batteries that have been removed from a disposed vehicle are collected through
Lexus dealers. Do not dispose of the battery yourself.
Unless the battery is properly collected, th e following may occur, resulting in death
or serious injury: ●
The hybrid battery may be illegally di sposed of or dumped, and someone may
touch a high voltage part, resulting in an electric shock.●
The hybrid battery is intended to be used exclusively with your hybrid vehicle. If
the hybrid battery is used outside of your vehicle or modified in any way, acci-
dents such as electric shock, heat ge neration, smoke generation, an explosion
and electrolyte leakage may occur.
When reselling or handing over your vehi cle, the possibility of an accident is
extremely high because the person receivin g the vehicle may not be aware of these
dangers.■
Disposal of the hybrid battery (traction battery)
If your vehicle is disposed of without the hybrid battery having been removed, there
is a danger of serious electric shock if high voltage parts, cables and their connec-
tors are touched. In the event that your ve hicle must be disposed of, the hybrid bat-
tery must be disposed of by your Lexus dealer or a qualified service shop. If the
hybrid battery is not disposed of properly, it may cause electric shock that can result
in death or serious injury.

311-1. Hybrid system
1
Before driving
Vehicle Proximity Notification System
When the gasoline engine is off wh ile driving, a sound is produced to
warn pedestrians, people riding bicy cles or other people and vehicles in
the surrounding area that the vehicle is approa ching. The pitch of the
sound adjusts according to vehicle speed. When vehicle speed is approx-
imately 12 mph (20 km/h) or mo re, the warning system turns off.■ When stopped/during start-off
The gasoline engine stops when the vehicle is stopped. During start-
off, the electric motor (traction mo tor) drives the vehicle. At slow
speeds or when traveling down a ge ntle slope, the engine is stopped
and the motor is used.
■ During normal driving
The gasoline engine is predomina ntly used. The electric motor
(traction motor) charges the hybrid battery as necessary.
■ When accelerating sharply
The power of the hybrid battery (tract ion battery) is added to that of
the gasoline engine via the electric motor (traction motor).
■ When braking (regenerative braking)
The electric motor (traction moto r) charges the hybrid battery
(traction battery).

321-1. Hybrid system
■
Regenerative braking
In the following situations, kinetic energy is converted to electric energy and decel-
eration force can be obtained in conjunction with the recharging of the hybrid bat-
tery (traction battery). ●
The accelerator pedal is released. ●
The brake pedal is depressed with the shift lever in D or S.■
Conditions in which the gasoline engine may not stop
The gasoline engine starts and stops automatically. However, it may not stop auto-
matically in the following conditions: ●
During gasoline engine warm-up●
During hybrid battery (traction battery) charging●
When the temperature of the hybrid batt ery (traction battery) is high or low●
When the heater is switched on■
Charging the hybrid battery (traction battery) ●
As the gasoline engine charges the hybrid battery (traction battery), the battery
does not need to be charged from an outside source. However, if the vehicle is
left parked for a long time the hybrid ba ttery will slowly discharge. For this rea-
son, be sure to drive the vehicle at least once every few months for at least 30
minutes. If the hybrid battery becomes fully discharged and you are unable to
jump-start the vehicle with the 12-volt battery, contact your Lexus dealer. ●
If the shift lever is in N, the hybrid battery (traction battery) will not be charged.
Always put the shift lever in P when the vehicle is stopped. When driving in
heavy traffic, operate the vehicle with the shift lever in D or S to avoid discharg-
ing the battery.■
After the 12-volt battery has discharged or has been changed or removed
The gasoline engine may not st op even if the vehicle is running on the hybrid battery
(traction battery). If this continues for a few days, contact your Lexus dealer.

331-1. Hybrid system
1
Before driving ■
Sounds and vibrations specific to a hybrid vehicle
There may be no engine sounds or vibration even though the vehicle is able to
move. Always shift the shift lever to P when parked.
The following sounds or vibrations may o ccur when the hybrid system is operating,
and are not a malfunction: ●
Motor sounds may be heard fr om the engine compartment.●
Sounds may be heard from the hybrid battery (traction battery) under the rear
seat when the hybrid system starts or stops.●
Sounds from the hybrid system may be heard when the back door is open.●
Sounds may be heard from the hybrid transmission when the engine is started
or stopped, or while the engine is idling.●
Engine sounds may be heard when accelerating sharply.●
Sounds may be heard due to regenerative braking when the brake pedal is
depressed and accelerator is loosened.●
Vibration may be felt when the gasoline engine starts or stops.●
Cooling fan sounds may be heard from th e air intake vents un der the rear seat.■
Vehicle Proximity Notification System
In the following cases, the Vehicle Proximit y Notification System sound may be diffi-
cult for pedestrians, people riding bicycles or other peop le and vehicles in the sur-
rounding area to hear: ●
When there is a lot of noise in the vicinity ●
When it is raining or during strong winds●
When in the area surrounding the rear of the vehicle, rather than in front of the
vehicle■
Maintenance, repair, recycling, and disposal
Contact your Lexus dealer regarding main tenance, repair, recycling and disposal.
Do not dispose of the vehicle yourself.

341-1. Hybrid system
Hybrid system precautions Take care when handling the hybrid sy stem, as it contains a high voltage
system (about 650 V at maximum) as well as parts that become extremely
hot when the hybrid system is operat ing. Obey the caution labels attached
to the vehicle.
*: AWD models only Air conditioning compressor
High voltage cables (orange)
Power control unit with DC/
DC converter
Hybrid battery (traction bat-
tery) Rear electric motor (traction
motor)*
Service plug
Front electric motor (traction
motor)
Caution label

351-1. Hybrid system
1
Before driving Hybrid battery air vents
There are air intake vents under
the rear seats for the purpose of
cooling the hybrid battery (traction
battery). If the vents become
blocked, the hybrid battery may
overheat, leading to a reduction in
hybrid battery output.
Emergency shut off system
When a certain level of impact is detected by the impact sensor, the
emergency shut off system blocks off the high voltage current and stops
the fuel pump to minimize the risk of electrocution and fuel leakage. If the
emergency shut off system activates, your vehicle will not restart. To
restart the hybrid system, contact your Lexus dealer.
Hybrid warning message
A message is automatically displayed when a malfunction occurs in the
hybrid system or an impr oper operation is attempted.
If a warning message is shown on
the multi-information display, read
the message and follow the
instructions. ( 
P. 743)