WARNING: This page is about a different car, the 2002 Volvo C70, 2001 Volvo C70, 2000 Volvo C70, 1999 Volvo C70, and 1998 Volvo C70. However, it is still accessible from the selected car via links, so may be relevant.
Condition
Fig 1: Identifying TMC/FM Receiver
Courtesy of VOLVO CARS OF NORTH AMERICA.
no diagnostic trouble codes (DTCs) stored
Possible Source
Short-circuit to ground in power supply to TMC/FM receiver.
Short-circuit to supply voltage in ground lead to TMC/FM receiver.