Jeep grand cherokee Owner's Manual page 232

230 UNDERSTANDING THE FEATURES OF YOUR VEHICLE
The vehicle is close to the obstacle when the DID 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
79-39 in
(200-100 cm)
47-39 in
(120-100 cm)
None Single 1/2
Second Tone
(for rear only)
None 4th Solid
No Yes
39-25 in 25-12 in
(100-65 cm) (65-30 cm)
39-25 in 25-12 in
(100-65 cm) (65-30 cm)
Slow (for rear
only)
3rd Solid 2nd Flashing
Yes
Less than 12 in
(30 cm)
Less than 12 in
(30 cm)
Fast Continuous
1st Flashing
Yes Yes