Suzuki VITARA series Owner's Manual page 447

Specific conditions for installation
NOTE:
1) Antenna cable is routed as far as possible from the vehicle electronic devices and wiring harness in the vehicle.
2) Power cable of transmitter is properly connected to lead-acid battery on the vehicle.
Before using your vehicle, check if there is no interference to all electrical devices on your vehicle for both Standby mode
and Transmitting mode of the RF transmitting equipment.
NOTICE
54P00-01E