AP4-CH41: Rear Parking Sensor Audio Not Working

When installing the AP4-CH41 into vehicles with parking sensors you may not hear the parking sensor chimes. This is because they are not enabled by default. The following steps explain how to enable them.

1. Download and install the AmpPro Utility Tool from the AP4-CH41 product page.
2. Open the app and then connect the AP4-CH41 to the PC with a Micro-B USB cable designed for data transfer. 
3. Make sure the AP4-CH41 is connected to the vehicle and the key or Push-To-Start is cycled to the On position.
4. Navigate to the Configure tab in the utility tool and then enable the rear chimes.  (Figure A)
5. Once the process is complete unplug the AP4 from the computer and then test for functionality.

(Figure A)