B2470 GMC – Cellular Phone Antenna Circuit Malfunction

B2470 GMC Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light)

B2470 GMC Possible Causes

Faulty Cellular Phone Antenna,Cellular Phone Antenna harness is open or shorted,Cellular Phone Antenna circuit poor electrical connection,Faulty Telematics Communication Interface Control Module

B2470 GMC Description

The cellular phone and navigation antenna is connected to the Telematics Communication Interface Control Module. This module supplies 5 V to the cellular phone and navigation antenna to power the internal amplifier. When the vehicle is equipped with the optional navigation radio, a navigation antenna signal splitter is installed to distribute the GPS signal to both the telematics communication interface control module and the navigation radio. The navigation radio supplies 5 V through the GPS antenna coaxial cable to the navigation antenna signal splitter to power the internal navigation radio signal amplifier.