NISSAN 2013 LEAF - Navigation System Owner's Manual - Manual (Page 251)

Symptom Possible cause Possible solution
Noise is heard when using a cellular phone under/
near areas of elevated railroads, high voltage
electric power cables, traffic signals, neon bill-
boards, etc. Electromagnetic waves that are generated from radio
devices may adversely affect the cellular phone. This is not a malfunction.
Noise is heard in the sound from the audio system
while using a cellular phone. Radio waves that are generated from a cellular phone
may adversely affect the sound from the audio system. This is not a malfunction.
Troubleshooting guide/General system information 10-25