Cruise Control System (For 2Ad-Fhv) - Fail-Safe Chart
Lexus IS250 IS220d GSE20 ALE20 CRUISE CONTROL
The lowest possible limit of the speed setting range is set at approximately 40 km/h (25 mph). The cruise control system cannot be set when the driving vehicle speed is below the low speed limit. Cruise control operation will be automatically canceled and the stored vehicle speed will be erased when the vehicle speed goes below the low speed limit while the cruise control is in operation.