See also:

Engine data
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CTA and Reverse Sensing System (RSS) interaction
CTA works along with the Reverse Sensing System (RSS) (if equipped). Become familiar with the warning tones of both systems. ...

BLIS -CTA fault operation
If the BLIS -CTA senses a fault on either the left or right sensor, the BLIS alert indicator will go ON and remain ON and the message center will display BLIND SPOT SYSTEM FAULT or CROSS TRAFFIC S ...