Preliminary Checks - Volvo Link System Service Bulletin

Page 32
Antenna Checks

Preliminary Checks

Physically verify that the Rami antennas are attached to
the vehicle and are connected to the cables in the mirror
housings properly. Also verify that there is no damage to
the antenna system. Replace all defective or missing
components before continuing with the fault tracing be-
low.
Do not attempt to troubleshoot radio/antenna reception
problems in the following conditions:
•
Inside buildings
•
In areas with a high rate of reflected signal activity
(reflected signals are weaker than direct signals &
cause problems with cancellation of the direct sig-
nals), which ultimately affects radio reception clarity.
•
In areas of electrical interference (such as high ten-
sion electrical lines)
•
When there are electrical storms nearby
The following checks should be performed if a communi-
cation problem exists with the Volvo Link system, and
the antennas are suspected as being the problem. If a
problem is suspected with the radio see Service Infor-
mation on the Audio System in group 39.
Basic Reception Test
Perform the following checks of the radio signals (AM/FM
and Weatherband). Stations should come in clear with
no static.
If the radio plays well, the antenna system is OK. If the
radio does not play well, then it is reasonable to say that
a problem exists in one of the following:
•
Radio
•
Volvo Link ECU
•
Antenna system
Check
Reception with antenna con-
nected directly to the radio
Reception with antenna discon-
nected from radio
Antenna disconnected from Volvo
Link ECU and each end recon-
nected to each other (RF In
connected to RF Out)
Expected Result Possible Cause
OK Radio and antenna system are OK. Fault may be in the
Volvo Link ECU or cables. Check fault codes and test with
VCADS Pro.
Not OK Fault may be in the antenna system. See Service Infor-
mation on antenna troubleshooting in group 39, "Audio
System."
Not OK A difference in reception should be noticed. Use this dif-
ference (connected vs disconnected) as a baseline to
judge reception clarity.
OK Radio and Antenna system are OK. Fault is in Volvo Link
ECU.
Not OK The RF IN / RF OUT jumper cables may be defective.
Volvo Link ECU and Antenna System
A Multiplex Whip Antennas
B RAMI Antenna Multiplexer Box
C GPS Antenna
D Antenna Jumper Cable
W3005013