Page 543 of 612
5438-2. Steps to take in an emergency
8
When trouble arises
IS300h_EE(OM53C61E)
Set the parking brake.
Turn the power switch to ACCESSORY mode.
Depress the brake pedal.
Pry the cover up with a flathead
screwdriver or equivalent tool.
To prevent damage to the cover, cover
the tip of the screwdriver with a rag.
Press the shift lock override button.
The shift lever can be shifted while the
button is pressed.
If the shift lever cannot be shifted from P
If the shift lever cannot be shifted with your foot on the brake pedal, there may
be a problem with the shift lock system (a system to prevent accidental opera-
tion of the shift lever). Have the vehicle inspected by any authorized Lexus
dealer or repairer, or another duly qualified and equipped professional imme-
diately.
The following steps may be used as an emergency measure to ensure that the
shift lever can be shifted:
1
2
3
4
5
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Page 545 of 612
5458-2. Steps to take in an emergency
8
When trouble arises
IS300h_EE(OM53C61E)
Ensure that the shift lever is in P and depress the brake pedal.
Touch the Lexus emblem side of the
electronic key to the power switch.
When the electronic key is detected, a
buzzer sounds and the power switch will
turn to ON mode.
When the smart entry & start system is
deactivated in customization setting, the
power switch will turn to ACCESSORY
mode.
Firmly depress the brake pedal and check that is shown on the multi-
information display.
Press the power switch.
In the event that the hybrid system still cannot be started, contact any authorized
Lexus dealer or repairer, or another duly qualified and equipped professional.
Starting the hybrid system
1
2
3
4
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Page 546 of 612

5468-2. Steps to take in an emergency
IS300h_EE(OM53C61E)
■Stopping the hybrid system
Shift the shift lever to P and press the power switch as you normally do when stopping the
hybrid system.
■Replacing the key battery
As the above procedure is a temporary measure, it is recommended that the electronic
key battery be replaced immediately when the battery is depleted. (→P. 4 7 1 )
■Alarm (if equipped)
Using the mechanical key to lock the doors will not set the alarm system.
If a door is unlocked using the mechanical key when the alarm system is set, the alarm
may be triggered.
■Changing power switch modes
Release the brake pedal and press the power switch in step above.
The hybrid system does not start and modes will be changed each time the switch is
pressed. (→P. 2 1 0 )
■When the electronic key does not work properly
●Make sure that the smart entry & start system has not been deactivated in the customi-
zation setting. If it is off, turn the function on.
(Customizable features →P. 5 7 3 )
●Check if battery-saving mode is set. If it is set, cancel the function. (→P. 1 5 0 )
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
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Page 556 of 612
5568-2. Steps to take in an emergency
IS300h_EE(OM53C61E)
Stop the hybrid system. Set the parking brake and shift the shift lever to P.
Remove the mud, snow or sand from around the rear wheels.
Place wood, stones or some other material under the rear wheels to help pro-
vide traction.
Restart the hybrid system.
Shift the shift lever to D or R and release the parking brake. Then, while exer-
cising caution, depress the accelerator pedal.
■When it is difficult to free the vehicle
If the vehicle becomes stuck
Carry out the following procedures if the tires spin or the vehicle becomes
stuck in mud, dirt or snow:
Press to turn off TRC.
1
2
3
4
5
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Page 560 of 612
560
IS300h_EE(OM53C61E)9-1. Specifications
*1:Unladen vehicle
*2: Vehicles with 255/35R18 tires
*3: AVE30L-AEXEHW and AVE30R-AEXEHW models
*4: AVE30L-AEXLHW and AVE30R-AEXLHW models
The model code is indicated on the manufacturer’s label. (→P. 5 6 1 )
*5: Vehicles with a towing package
Maintenance data (fuel, oil level, etc.)
Dimensions and weights
Overall length 4665 mm (183.7 in.)
Overall width 1810 mm (71.3 in.)
Overall height*11430 mm (56.3 in.)
Wheelbase 2800 mm (110.2 in.)
Tr e a d*1Front 1535 mm (60.4 in.)
Rear1550 mm (61.0 in.)
1540 mm (60.6 in.)*2
Gross vehicle mass*52130 kg (4696 lb.)*3
2145 kg (4729 lb.)*4
Maximum permissi-
ble axle capacity
*5
Front 1090 kg (2403 lb.)
Rear 1200 kg (2646 lb.)
Drawbar load*575 kg (165 lb.)
Towing capacity*5With brake 750 kg (1653 lb.)
Witho ut brake 750 kg (1653 lb.)
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Page 567 of 612

567
9 9-1. Specifications
Vehicle specifications
IS300h_EE(OM53C61E)Your Lexus vehicle is filled with “Toyota Genuine Differential Gear Oil” at the factory.
Use Lexus approved “Toyota Genuine Differential Gear Oil” or an equivalent of match-
ing quality to satisfy the above specification. Please contact any authorized Lexus dealer
or repairer, or another duly qualified and equipped professional for further details.
*1: Minimum pedal clearance when depressed with a force of 500 N (51.0 kgf, 112.4 lbf)
while the hybrid system is operating.
*2: Parking brake pedal travel when depressed with a force of 300 N (30.6 kgf, 67.4 lbf)
Differential
Oil capacity1.35 L (1.42 qt., 1.19 Imp. qt.)
Oil type and viscosityToyota Genuine Differential gear oil LT
75W-85 GL-5 or equivalent
Brakes
Pe d a l c l e a r a n c e*1117 mm (4.6 in.) Min.
Pedal free play1.0 — 2.0 mm (0.04 — 0.08 in.)
Parking brake pedal travel*27 - 10 clicks
Fluid typeSAE J1703 or FMVSS No. 116 DOT 3, or
SAE J1704 or FMVSS No.116 DOT 4
Steering
Free playLess than 30 mm (1.2 in.)
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Page 582 of 612

5829-2. Customization
IS300h_EE(OM53C61E)
■Vehicle customization
●When the speed-detecting automatic door lock and shift-linked automatic door lock
are both on, the door lock operates as follows.
• When shifting the shift lever to any position other than P, all the doors will be locked.
• If the vehicle is started with all doors locked, the speed-detecting automatic door
lock will not operate.
• If the vehicle is started with any door unlocked, the speed-detecting automatic door
lock will operate.
●When the smart entry & start system is off, the entry unlock function cannot be custom-
ized.
●When the doors remain closed after unlocking the doors and the timer activated auto-
matic door lock function activates, signals will be generated in accordance with the
operation buzzer volume and operational signal (Emergency flashers) function set-
tings.
■When customizing using the Remote Touch or Lexus Display Audio controller
Stop the vehicle in a safe place, apply the parking brake, and shift the shift lever to P. Also,
to prevent 12-volt battery discharge, leave the hybrid system operating while customiz-
ing the features.
CAUTION
■During customization
As the hybrid system needs to be operating during customization, ensure that the vehi-
cle is parked in a place with adequate ventilation. In a closed area such as a garage,
exhaust gases including harmful carbon monoxide (CO) may collect and enter the
vehicle. This may lead to death or a serious health hazard.
NOTICE
■During customization
To prevent 12-volt battery discharge, ensure that the hybrid system is operating while
customizing features.
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Page 587 of 612

587What to do if... (Troubleshooting)
IS300h_EE(OM53C61E)
●The function to prevent the electronic key from being left inside the trunk will
operate and you can open the trunk as usual. Take the key out from the trunk.
(→P. 1 4 6 )
●Did you press the power switch while firmly depressing the brake pedal?
(→P. 2 0 9 )
●Is the shift lever in P? (→P. 211)
●Is the electronic key anywhere detectable inside the vehicle? (→P. 1 4 9 )
●Is the steering wheel unlocked? (→P. 212)
●Is the electronic key battery weak or depleted?
In this case, the hybrid system can be started in a temporary way. (→P. 5 4 5 )
●Is the 12-volt battery discharged? (→P. 5 4 7 )
●Is the power switch in ON mode?
If you cannot release the shift lever by depressing the brake pedal with the
power switch in ON mode. (→P. 5 4 3 )
●It is locked automatically to prevent theft of the vehicle. (→P. 212) The trunk lid is closed with the electronic key left inside
If you think something is wrong
The hybrid system does not start
The shift lever cannot be shifted from P even if you depress the brake
pedal
The steering wheel cannot be turned after the hybrid system is stopped
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