4 Runner 4WD V8-4.7L (2UZ-FE) (2003)
b. Multipath
Interference caused by reflection of radio waves against obstructions is called "Multipath". Multipath occurs when radio signals emitted from
the broadcast transmitter antenna are reflected against tall buildings or mountains and interferes with other signals which is to be received
directly.
c. Fade Out
Because of the frequency higher than that of AM, FM radio wave tends to be reflected against obstructions such as tall buildings or mountains.
For this reason, FM signals often seems to gradually disappear or fade away as the vehicle g6es behind those obstructions. This phenomenon is
called "fade out".
4. NOISE PROBLEMS
a. It is very important for noise troubleshooting to understand a customer's claim clearly. Use the table to diagnose the phenomenon.
HINT:
If the condition where the noise occurs does not meet any of the above, find out the cause based on "Reception Problems". Refer to the
description about Multipath and Fading mentioned previously.