GPS Navigation

RTI with integrated DVD 

Fig 1: Identifying RTI With Integrated DVD Input And Output Signals

Courtesy of VOLVO CARS OF NORTH AMERICA.

RTI with CD changer 

Fig 2: Identifying RTI With CD Changer Input And Output Signals

Courtesy of VOLVO CARS OF NORTH AMERICA.

The GPS antenna (16/47) receives signals from a minimum of three and a maximum of eight GPS satellites. These signals are then sent on to the GPS receiver in the RTI control module (16/45).

The position of the car is calculated and a route is displayed for the selected destination.

Data for voice guiding for the selected route is transmitted on the serial bus (Melbus) between the RTI control module and the audio module (16/1).

In order for the RTI system to select a route, a DVD (16/45) or CD (16/48) must be available with the road network. For CD changer systems the data is transmitted on a serial bus (Melbus) to the RTI.

Data about speed, the wheel rotation counter and parking brake is sent using CAN communication from the central electronic module (4/56), ABS (4/16) and driver information module DIM(5/1).

Data is sent to the display screen (16/46) from the RTI control module on serial buses.

Commands from the remote control are sent from the display screen (16/46) to the RTI unit (16/45) on a serial bus (remocon signal).

The menu is accessed and used via the buttons on the reverse of the steering wheel. Data is sent from the steering wheel module (3/130) to the RTI unit (16/45) via the Control area network (CAN). There are three steering wheel buttons which are used to control the menu on the screen. There is a four-way switch on which each part of the switch moves the cursor upwards, downwards, to the left or to the right. There is an ENTER button and a BACK button.

When a new GPS antenna is installed for the RTI system, it may take up to 15 minutes before the GPS receiver has the correct information.