USB Power Outlet Inspection

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

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 .)