Lexus 2013 IS250 - Page 276

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4-5. Using the driving support systems
IS250_EE(OM53B11E)
 Operating conditions of hill-start assist control
When the following four conditions are met, the hill-start assist control will oper-
ate:
 The shift lever is in a position other than P or N (when starting off forward/
backward on an upward incline).
 The vehicle is stopped.
 The accelerator pedal is not depressed.
 The parking brake is not engaged.
 Automatic system cancelation of hill-start assist control
The hill-start assist control will turn off in any of the following situations:
 The shift lever is moved to P or N.
 The accelerator pedal is depressed.
 The parking brake is engaged.
 Approximately 2 seconds elapse after the brake pedal is released.
 Operating conditions of emergency brake signal
When the following three conditions are met, the emergency brake signal will
operate:
 The emergency flashers are off.
 Actual vehicle speed is over 55 km/h (35 mph).
 The brake pedal is depressed in a manner that cause the system to judge from
the vehicle deceleration that this is a sudden braking operation.
 Automatic system cancelation of emergency brake signal
The emergency brake signal will turn off in any of the following situations:
 The emergency flashers are turned on.
 The brake pedal is released.
 The system judges from the vehicle deceleration that is not a sudden braking
operation.