Lexus LX 570 2009 Manual page 247

Extra high mode
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If the vehicle becomes stuck or the Crawl Control system requests the vehicle
height be raised, extra high mode may be automatically selected when the vehicle
height is in high mode with the four-wheel drive control switch in the "L4" position.
The vehicle height is raised to 0.8 in. (20 mm) higher than the high mode height, or
slightly higher.
Extra high mode will change back to high mode when:
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• The vehicle speed exceeds 6 mph (10 km/h)
• The four-wheel drive control switch is shifted to "H4".
If you pull the height select switch to "" when in extra high mode, normal mode
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is selected.
Extra high mode cannot be manually selected.
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Turning off the 4-Wheel AHC
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The system will remain off until the height control "OFF" switch is pushed again,
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even if the "ENGINE START STOP" switch is turned off.
Even if the system is turned off, the system automatically modulated if the vehi-
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cle speed exceeds following.
• 19 mph (30 km/h) with high or low mode
• 50 mph (80 km/h) with normal mode
If the vehicle travels at high speed while in normal mode
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The vehicle' s height will automatically lower by 0.8 in. (20 mm) at the front and 0.6
in. (15 mm) at the rear. If the vehicle' s speed decreases, the vehicle' s height automat-
ically returns to normal.
If the vehicle is loaded with heavy items, a shock may be felt at this time.
When driving on bumpy roads with the four-wheel drive control switch in "L4"
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High mode is automatically selected.
2-4. Using other driving systems
2
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