Operation CHARM: Car repair manuals for everyone.

Popping Noise

An intermittent popping noise from the radio speakers may be heard when playing an audio cassette with a cellular phone powered On and the cellular phone antenna in the vehicle. The condition may occur, with phone powered On, whether or not a call is taking place.

This is caused by the antenna on the cellular phone being too close to the radio. The cellular phone sends electrical impulses that get amplified by the radio. This occurs when the cellular phone receiver switches cells or power levels.

Inform the customer that an exterior clip-on or window glue-on type cellular phone antenna instead of an interior cellular phone antenna must be used. Exterior mounted cellular phone antennas are available from cellular phone retailers.