Lexus GS450h2016 Service Manual page 203

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In the situations shown below, the system may not be able to accurately detect sur-
rounding brightness levels. This may cause the low beams to remain on or the high
beams to cause problems for pedestrians, vehicles ahead or other parties. In these
cases, manually switch between the high and low beams.
• In bad weather (rain, snow, fog, sandstorms etc.)
• The windshield is obscured by fog, mist, ice, dirt etc.
• The windshield is cracked or damaged.
• The camera sensor is deformed or dirty.
• The camera sensor temperature is extremely high.
• Surrounding brightness levels are equal to those of headlights, tail lights or fog lights.
• Vehicles ahead have headlights that are either switched off, dirty, are changing color,
or have are not aimed properly.
• When driving through an area of intermittently changing brightness and darkness.
• When frequently and repeatedly driving ascending/descending roads, or roads with
rough, bumpy or uneven surfaces (such as stone-paved roads, gravel tracks etc.).
• When frequently and repeatedly taking curves or driving on a winding road.
• There is a highly reflective object ahead of the vehicle, such as a sign or a mirror.
• The back of a vehicle ahead is highly reflective, such as a container on a truck.
• The vehicle' s headlights are damaged or dirty, or are not aimed properly.
• The vehicle is listing or tilting, due to a flat tire, a trailer being towed etc.
• The high beam and low beam are repeatedly being switched between in an abnor-
mal manner.
• The driver believes that the high beam may be causing problems or distress to other
drivers or pedestrians nearby.
Temporarily lowering sensor sensitivity
The sensitivity of the sensor can be temporarily lowered.
Turn the power switch off while the following conditions are met.
1
• The headlight switch is in
• The headlight switch lever is in high beam position.
• Automatic High Beam switch is on.
Turn the power switch to ON mode.
2
Within 30 seconds after
3
position then pushing it to the high beam position quickly 10 times, then leave the lever
in high beam position.
If the sensitivity is changed, the Automatic High Beam indicator is turn on and off 3
4
times.
Automatic High Beam (headlights) may turn on even the vehicle is stopped.
Warning message
Warning messages are used to indicate a system malfunction or to inform the driver of
the need for caution. (P. 406)
GS450h_OM_OM30E99U_(U)
4-3. Operating the lights and wipers
or
.
, repeat pulling the headlight switch lever to the original
2
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