Diagnosis CCC - Self- and system tests: Background
The Car Communication Computer (CCC) contains the following five control modules:
- CCC-A/applications
- CCC-ASK/Audio System Controller
- CCC-GW/gateway
- CCC-BO/user interface
- CCC-ANT/antenna tuner
To detect faults, there are several test routines in each of these control modules. If there are faults, they are entered in the corresponding fault memory. During operation, however, due to the additional load on the processor, not all of the present test routines are run.
These additional test routines have to be started separately. For this purpose, there are so-called self-tests for each control module and in some control modules additional system tests . If these are started, several individual tests are carried out. If faults occur, entries are also made in the fault memory.
This means that for a thorough diagnosis, the self-tests and system tests of the individual control modules have to be run before fault memory can be checked.
This is done automatically in the present test plans for the CCC.
This service information describes scope of the self-tests and system test in the individual control modules.