XC90 AWD L5-2.5L Turbo VIN 59 B5254T2 (2005)
Antenna Control Module: Description and Operation
Design
Design
AM/FM
The antenna module (ATM) consists of a thin film antenna and an AM/FM receiver. The control module can be upgraded with GPS and traffic message
channel (TMC) units.
Information from the AM/FM receiver consists of radio signals received on the AM or FM-waveband.
The signal from the AM/FM tuner is transmitted to the audio control module (AUD) and infotainment module (ICM) via the MOST network.
If the antenna module (ATM) is not supplied with voltage communication on the MOST net does not function and the Infotainment system shuts down.
GPS
The data transmitted from the GPS unit consists of signals received from GPS satellites.
The GPS unit transmits the signal to the multimedia module (MMM) via the MOST network.
The navigation system requires at least three satellites in order calculate the position of the car. The position calculated from the GPS satellites is
accurate to within 25 meters.
The power supply to the GPS unit is from the antenna module (ATM).
The GPS unit is integrated with the antenna module (ATM) and transmits signals via the MOST network.
Note! If the GPS signal is being diagnosed because it is missing, the signal should be tested outdoors. This is because the signal may be blocked
if the vehicle is indoors.
Traffic message channel (TMC)
The traffic message channel (TMC) signal is captured by the TMC receiver and transmitted to the receiver in the multimedia module (MMM) via the
MOST network.
The information is then displayed on the screen.
The traffic message channel (TMC) receiver is integrated with the antenna module (ATM) and transmits signals via the MOST network.
This also applies to FM Multiplex, which is the Japanese equivalent of traffic message channel (TMC).
