Diagnosis CCC - Self- and system tests

Diagnosis CCC - Self- and system tests

Background

The Car Communication Computer (CCC) contains the following five control modules:

1. CCC-A / applications
   
2. CCC-ASK / Audio System Controller
   
3. CCC-GW / gateway
   
4. CCC-BO / user interface
   
5. 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 document describes scope of the self-tests and system test in the individual control modules.

Self-tests

CCC-A / applications

• Hardware of the navigation computer (HIP)
  
• File system
  
• Memory of the navigation computer
  
• Power supply of the navigation computer
  
• Voltage of the rotation rate sensor
  
• State of the rotation rate sensor
  

CCC-ANT / antenna tuner

• Hardware of the tuner
  
• Connection to the antenna diversity
  
• Memory of the tuner
  
• Internal 8.5-V voltage
  

CCC-ASK / Audio System Controller

• Hardware of the ASK
  
• Memory of the ASK
  
• Connection to the MD drive (if installed)
  

CCC-BO / user interface

• Hardware of the processor board
  
• Connection to DVD drive
  
• Memory of the processor board
  
• Boot file
  

CCC-GW / gateway

• Hardware of the gateway
  
• RAD_ON signal
  
• Internal voltages of the CCC
  
• Memory of the gateway
  
• Temperatures in the CCC with exception of the DVD drive
  

System tests

CCC-A / applications

• Connection to GPS antenna
  
• Connection to the navigation computer
  

CCC-ANT / antenna tuner

• CCC-internal connections
  
• Connection to radio antenna
  

CCC-ASK / Audio System Controller

• Microphone
  
• Mute signal
  
• Audio input / audio output
  
• Connection to telephone
  
• Voice processing system
  
• CCC-internal connections
  

CCC-BO / user interface

• Hardware of the processor board
  
• Connection to Central Information Display
  
• CAN-bus
  
• Internal MOST bus
  
• Voice processing system
  

CCC-GW / gateway

• Hardware of the gateway
  
• CAN-bus
  
• MOST bus
  
• Fan
  
• Connection to the loudspeakers
  
• Terminal 58g (instrument lighting)