Circuit/System Description
WARNING: This page is about a different car, the 2008 Isuzu i-370, 2008 Isuzu i-290, 2008 GMC Canyon, and 2008 Chevrolet Colorado. However, it is still accessible from the selected car via links, so may be relevant.
The navigation antenna is connected to the communication interface module (CIM) with a RG-174 coax cable. The CIM polls the data from the navigation antenna once every second.