Global Positioning System Module: Description and Operation

Diagnostic functions

General
The control module has a built-in diagnostic system, the Volvo on-board diagnostic (OBD) system, which continuously monitors itself and its input and output signals.

Diagnostic trouble codes (DTCs)




If the control module detects a fault it will store a diagnostic trouble code (DTC). The control module can store up to 11 diagnostic trouble codes (DTCs).
If for some reason a fault disappears after the diagnostic trouble code (DTC) has been permanently stored in the control module, information about the fault is stored in the control module.

Reading off Volvo on-board diagnostic (OBD) system




Fault data and other information can be read off using the VIDA PC which is connected to the data link connector (DLC) under the center console cover via VCT 2000. The VIDA PC communicates with the control module via a standardized interface.

Volvo on-board diagnostic (OBD) system
With the VIDA PC it is possible to:
- read off and erase diagnostic trouble codes (DTCs) stored
- activate components/functions according to predetermined patterns
- Continuously monitor the value and status of input and output signals
- carry out a self test on the system components.
- read off control module identification.
To activate the Volvo on-board diagnostic (OBD) system:
- ignition on
- battery voltage normal.

Note! With the Volvo on board diagnostic system (OBD) activated the screen will always fold up, without showing any information. The RTI system regains normal function when the diagnosis is finished!

Reading and erasing diagnostic trouble codes (DTCs)
Stored diagnostic trouble codes (DTCs) can be erased using this function. The on-board diagnostic (OBD) system can identify 11 different faults in the form of diagnostic trouble codes (DTCs).
Diagnostic trouble codes (DTCs) can only be erased when all stored diagnostic trouble codes (DTCs) have been read off at least once.

Activating components/functions
Components and functions can be activated with this function. To activate components and functions the ignition must be on.
The following components can be activated:
- display, color scale
- sound, voice message function

Reading off input and output signals
Using this function the values and status of the control module input and output signals can be continuously read off.
The following parameters can be read off:
- speed, from combined instrument panel
- position, which direction the car is traveling in, backwards, forwards or stationary
- lighting, if the lighting is on or off.
- the year, according to the GPS system
- the day, according to the GPS system
- the hour, according to the GPS system
- the minute, according to the GPS system
- the second, according to the GPS system

Note! The time given is drawn from GMT (Greenwich Mean Time), in other words the time will deviate by a number of hours depending on which time zone the car is in.

Activating system test
A system test can be carried out with this function.
The following tests are carried out:
- check if CD-ROM player is connected
- check if CD-ROM player is in " eject position"
- check of what type of CD-ROM disc is in the CD-ROM player
- checking CD-ROM player function
- checking control module memory
- checking function of GPS reception in control module
- checking TMC receiver
- checking FM receiver.

Note! The RTI system is equipped with either a TMC or an FM receiver. The FM receiver is for the Japanese market.

Reading off control module identification
The VIDA PC can identify the control module by reading off a code from the control module memory. This code contains information about the control module P/N.