USB Power Outlet Inspection

WARNING: This page is about a different car, the 2017 Mazda CX-5. However, it is still accessible from the selected car via links, so may be relevant.

Switch the ignition ON (engine off).
Measure the voltage between the USB port power supply and GND.

Fig 1: Checking USB Power Outlet Supply

Courtesy of MAZDA MOTORS CORP.

If the voltage is from 4.75 V to 5.25 V:

The USB power outlet is normal.

If the voltage is less than 4.75 V or higher than 5.25 V:

Replace the USB power outlet. (See USB POWER OUTLET REMOVAL/INSTALLATION .)