When Changing The Tires; Warning Messages For The Lda System; Before Using The Lda System; Situations Unsuitable For Lda System - Lexus 2016 IS 200t Service Manual

When driving on roads that are branching or merging
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When driving on a road surface that is wet due to rain, previous rainfall, standing water,
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etc.
When the vehicle experiences strong up-and-down motion such as when driving on an
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extremely rough road or on a seam in the pavement
When headlight brightness at nighttime is reduced due to dirt on the lenses, or when
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the headlights are misaligned
When driving on winding roads or roads that are uneven
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When driving on rough or unpaved roads
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When changing the tires

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Depending on the tires used, sufficient performance may not be maintainable.

Warning messages for the LDA system

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Warning messages are used to indicate a system malfunction or to inform the driver of
the need for caution while driving. (P. 486)
CAUTION

Before using the LDA system

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Do not rely solely on the LDA system. The LDA system does not drive the vehicle auto-
matically, nor does it reduce the amount of care you need to take. As such, the driver
must always assume full responsibility for understanding his/her surroundings, for
operating the steering wheel to correct the driving line, and for driving safely.
Inappropriate or negligent driving could lead to an accident.
To avoid operating the LDA by mistake
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Switch the LDA system off using the LDA switch when not in use.

Situations unsuitable for LDA system

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Do not use the LDA system in any of the following situations.
Otherwise, the system may not function correctly and could result in an accident.
When driving with tire chains, a spare tire, or similar equipment
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When there are objects or structures along the roadside that might be misinterpreted
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as lane markers (such as guardrails, a curb, reflector posts, etc.)
When driving on snowy roads
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When pavement lane markers are difficult to see due to rain, snow, fog, sand, dirt, etc.
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When there are visible lines on the pavement from road repairs, or if the remains of
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old lane markers are still visible on the road
When driving on a road with lane closures due to maintenance, or when driving in a
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temporary lane
IS350/300/200t_U (OM53D18U)
4-5. Using the driving support systems
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