Line resistance too high during USB test

WARNING: This page is about a different car, the 2013 BMW X5, 2012 BMW X5, and 2011 BMW X5. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Display - Line Resistance Too High During USB Test Screen

Courtesy of BMW OF NORTH AMERICA, INC.

The curve progression on the green line (1) drops off significantly in the graphic that is displayed. (Voltage under 3.9 Volt at 500mA)

NOTE: With several USB devices, a voltage around 4 V is not sufficient to guarantee the function. However, the vehicle is trouble-free! In this case, use a different USB device.

Troubleshooting:

Check USB cable connection between IMIB and vehicle (use spare cable from another IMIB if necessary).
Check the USB connection.
Check lines and plug connections in vehicle.