Lexus IS250 2009 Service Manual page 120

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2-1. Driving procedures
CAUTION
Do not turn the engine off while driving.
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The power steering and brake booster system will not operate properly if the
engine is not running.
Use engine braking (downshift) to maintain a safe speed when driving down a
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steep hill.
Using the brakes continuously may cause the brakes to overheat and lose effec-
tiveness. ( P. 132)
When stopped on an inclined surface, use the brake pedal and parking brake to
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prevent the vehicle from rolling backward or forward and causing an accident.
Do not adjust the position of the steering wheel, the seat, or the inside or outside
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rear view mirrors while driving.
Doing so may result in a loss of vehicle control that can cause accidents that may
result in death or serious injury.
Always check that all passengers' arms, heads or other parts of their bodies are
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not outside the vehicle, as this may result in death or serious injury.
Do not drive the vehicle off-road.
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This is not a AWD vehicle designed for real off-road driving. Proceed with all due
caution if it becomes unavoidable to drive off-road.
Do not drive across river crossings or through other bodies of water.
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This may cause electric/electronic components to short circuit, damage the
engine or cause other serious damage to the vehicle.
Do not drive in excess of the speed limit. Even if the legal speed limit permits it, do
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not drive over 85 mph (140 km/h) unless your vehicle has high-speed capability
tires. Driving over 85 mph (140 km/h) may result in tire failure, loss of control and
possible injury. Be sure to consult a tire dealer to determine whether the tires on
your vehicle are high-speed capability tires or not before driving at such speeds.
120

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