2017 Lexus IS300h towing

2124-1. Before driving
IS300h_EE(OM53D89E)
■Total trailer weight and permissible drawbar load
Total trailer weight
Weight of the traile r itself plus the trailer load should be within the max-
imum towing capacity. Exceeding
this weight is dangerous. ( P. 644)
When the total trailer weight is
greater than the vehicle weight, we
recommend the use of a friction sta- bilizer (sway control device).
Permissible drawbar load
Allocate the trailer load so that the drawba r load is greater than 25 kg (55.1 lb.) or
4% of the towing capacity. Do not let the drawbar load exceed the indicated weight. ( P. 644)
■Information tag (manufacturer’s label)
Gross vehicle mass
The combined weight of the driver, passengers, luggage, towing hitch, total curb
mass and drawbar load should not exceed the gross vehicle mass by more than
100 kg (220.5 lb.). Exceedin g this weight is dangerous.
Maximum permissible rear axle capacity
The weight borne by the rear axle should not exceed the maximum permissible
rear axle capacity by 15% or more. Exceeding this weight is dangerous.
The values for towing capacity were derived from testing conducted at sea level. Take note that engine output and towing capacity will be reduced at high altitudes.
Important points regarding trailer loads
1
2
Type AType B
1
2

2134-1. Before driving
4
Driving
IS300h_EE(OM53D89E)
WARNING
■When the gross vehicle mass or maximum permissible axle capacity is exceeded
Failing to observe this precau tion may lead to an accident causing death or serious
injury.
●Add an additional 20.0 kPa (0.2 kgf/cm2 or bar, 3 psi) to the recommended tire infla- tion pressure value. ( P. 652)
●Do not exceed the established speed limit for towing a trailer in built-up areas or 100
km/h (62 mph), whic hever is the lower.

2144-1. Before driving
IS300h_EE(OM53D89E)
Installation positions for the towing hitch/bracket and hitch ball
436 mm (17.2 in.)
475 mm (18.7 in.)
476 mm (18.7 in.)
502 mm (19.8 in.)
520 mm (20.5 in.)
560 mm (22.0 in.)
622 mm (24.5 in.)
1
2
3
4
5
6
7
307 mm (12.1 in.)
318 mm (12.5 in.)
342 mm (13.5 in.)
394 mm (15.5 in.)
704 mm (27.7 in.)
1138 mm (44.8 in.)
58 mm (2.3 in.)
53 mm (2.1 in.)
42 mm (1.7 in.)
34 mm (1.3 in.)
6 mm (0.2 in.)
11 mm (0.4 in.)
390 mm (15.4 in.)
8
9
10
11
12
13
14
15
16
17
18
19
20

2154-1. Before driving
4
Driving
IS300h_EE(OM53D89E)
■Tire information
●Increase the tire inflation pressure to 20.0 kPa (0.2 kgf/cm2 or bar, 3 psi) greater than
the recommended value when towing. ( P. 652)
●Increase the air pressure of the trailer tires in accordance with the total trailer weight
and according to the values recommended by the manufacturer of your trailer.
■Break-in schedule
Lexus recommends that vehicles fitted with new power train components should not be
used for towing trailers for the first 800 km (500 miles).
■Safety checks before towing
●Check that the maximum load limit for the towing hitch/bracket hitch ball is not
exceeded. Bear in mind that the coupling weight of the trailer will add to the load
exerted on the vehicle. Also make sure that you will not be towing a load that exceeds the maximum permissible axle capacity.
●Ensure that the trailer load is secure.
●Supplementary outside rear view mirrors shou ld be added to the vehicle if the traffic behind cannot be clearly seen with standa rd mirrors. Adjust the extending arms of
these mirrors on both sides of the vehicle so that they always provide maximum visibility
of the road behind.
■Maintenance
●Maintenance must be performed more frequently when using the vehicle for towing
due to the greater weight burden placed on the vehicle compared to normal driving.
●Retighten all bolts securing the hitching ball and bracket after towing for approximately
1000 km (600 miles).
NOTICE
■When the rear bumper strengthening material is aluminum
Ensure the steel bracket part does not come directly in contact with that area.
When steel and aluminum come into contact, there is a reaction similar to corrosion,
which will weaken the section concerned and may result in damage. Apply a rust inhib- itor to parts that will come in contact when attaching a steel bracket.

2164-1. Before driving
IS300h_EE(OM53D89E)
Your vehicle will handle differently when towing a trailer. In order to avoid acci-
dent, death or serious injury, keep the following in mind when towing:
■Checking connections between trailer and lights
Stop the vehicle and check the operation of the connection between the
trailer and lights after driving for a brief period as well as before starting off.
■Practicing driving with a coupled trailer
●Get the feel for turning, stopping and reversing with the trailer coupled by
practicing in an area with no or light traffic.
●When reversing with a coupled traile r, hold the section of the steering
wheel nearest to you and rotate clockwis e to turn the trailer left or counter-
clockwise to turn it right. Always rotate a little at a time to prevent steering
error. Have someone guide you when reversing to lessen the risk of an
accident.
■Increasing vehicle-to-vehicle distance
At a speed of 10 km/h (6 mph), the di stance to the vehicle running ahead of
you should be equivalent to or greater than the combined length of your vehi-
cle and trailer. Avoid sudden braking th at may cause skidding. Otherwise, the
vehicle may spin out of control. This is especially true when driving on wet or
slippery road surfaces.
■Sudden acceleration/steering input/cornering
Executing sharp turns when towing may re sult in the trailer colliding with your
vehicle. Decelerate well in advance when approaching turns and take them
slowly and carefully to avoid sudden braking.
■Important points regarding turning
The wheels of the trailer will travel closer to the inside of the curve than the
wheels of the vehicle. To make allowance for this, take the turns wider than you
would normally do.
Guidance

2174-1. Before driving
4
Driving
IS300h_EE(OM53D89E)
■Important points regarding stability
Vehicle movement resulting from unev en road surfaces and strong cross-
winds will affect handling. The vehicle ma y also be rocked by passing buses or
large trucks. Frequently check behind when moving alongside such vehicles.
As soon as such vehicle movement o ccurs, immediately start to decelerate
smoothly by slowly applying the brakes. Always steer the vehicle straight
ahead while braking.
■Passing other vehicles
Consider the total combined length of your vehicle and trailer and ensure that
the vehicle-to-vehicle distance is su fficient before executing lane changes.
■Transmission information
To maintain engine braking efficiency, when using engine braking when driv-
ing on a long steep downward grade, do not use the transmission in D. The
vehicle must be driven in gear shift position “4” in S mode. (P. 229)
■If the engine overheats
Towing a loaded trailer up a long, steep incline in temperatures exceeding
30 C (85F) may result in the engine overheating. If the engine coolant tem-
perature gauge indicates that the engine is overheating, turn the air condition-
ing off immediately, leave the road and stop the vehicle in a safe place.
( P. 636)
■When parking the vehicle
Always place wheel chocks under the wheels of both the vehicle and trailer.
Firmly set the parking brake an d shift the shift lever to P.

2184-1. Before driving
IS300h_EE(OM53D89E)
WARNING
■To avoid accident or injury
Do not tow a trailer when a tire installed is repaired with the emergency tire puncture
repair kit.
■Vehicle speed in towing
Observe the legal maximum speeds for trailer towing.
■Before descending hills or long declines
Reduce speed and downshift. However, never downshift suddenly while descending steep or long downhill grades.
■Operation of the brake pedal
Do not hold the brake pedal depressed often or for long periods of time. Doing so may result in the brake ov erheating or reduce braking effects.
NOTICE
■For vehicles with an emergency tire puncture repair kit (if equipped)
Do not tow anything if a tire that has been repaired using the emergency tire puncture
repair kit is installed. The load on the ti re may cause unexpected damage to the tire.

2684-5. Using the driving support systems
IS300h_EE(OM53D89E)
WARNING
■When to disable the pre-collision system
In the following situations, disable the system, as it may not operate properly, possibly
leading to an accident resultin g in death or serious injury:
●When the vehicle is being towed
●When your vehicle is towing another vehicle
●When transporting the vehicle via truck, boat, train or similar means of transportation
●When the vehicle is raised on a lift with the hybrid system on and the tires are allowed to rotate freely
●When inspecting the vehicle using a drum tester such as a chassis dynamometer or
speedometer tester, or when using an on vehicle wheel balancer
●When a strong impact is applied to the fron t bumper or front grille, due to an accident
or other reasons
●If the vehicle cannot be driven in a stable manner, such as when the vehicle has been in an accident or is malfunctioning
●When the vehicle is driven in a sporty manner or off-road
●When the tires are not properly inflated
●When the tires are very worn
●When tires of a size other than specified are installed
●When tire chains are installed
●When a compact spare tire or an emergency tire puncture repair kit is used
●If equipment (snow plow, etc.) that may obstruct the radar sensor or camera sensor is
temporarily installe d to the vehicle