RAM 1500 Owner's Manual page 203

The vehicle is close to the obstacle when the display
shows one flashing arc and sounds a continuous tone.
The following chart shows the warning alert operation
when the system is detecting an obstacle:
Rear Distance Greater than 79
(in/cm) in (200 cm)
Front Distance Greater than 47
(in/cm) in (120 cm)
Audible Alert
(Chime)
Arcs
Radio Volume
Reduced
NOTE: ParkSense® will reduce the volume of the radio,
if on, when the system is sounding an audio tone.
WARNING ALERTS
79-45 in
(200-115 cm)
47-39 in
(120-100 cm)
None Single 1/2
Second Tone
(for rear only)
None 4th Solid
No Yes
UNDERSTANDING THE FEATURES OF YOUR VEHICLE 201
45-31 in 31-18 in
(115-80 cm) (80-45 cm)
39-25 in 25-12 in
(100-65 cm) (65-30 cm)
Slow (for rear Fast
only)
3rd Solid 2nd Flashing
Yes Yes
3
Less than 18 in
(45 cm)
Less than 12 in
(30 cm)
Continuous
1st Flashing
Yes