See also:

Limitations
Distance Alert uses the same radar sensor used by Adaptive Cruise Control and the Collision Warning system. See page 159 for more information on the radar sensor’s limitations. NOTE Strong sun ...

Low battery voltage
If the battery voltage is too low, the parking brake cannot be applied or released. Connect an auxiliary battery if the battery voltage is too low, see page 114. ...

Limitations
In certain situations, the BLIS indicator light(s) may illuminate even when there are no other vehicles in the area monitored by the system. NOTE If the BLIS indicator lights illuminate occas ...