Deactivation, excess temperature

If a control unit becomes too hot, this control unit switches off for up to 10 minutes to protect the individual components against damage. Furthermore, the entire MOST bus can switch off for 10 minutes. After the control unit has cooled down, it is functional once again!

Bear in mind that the failure of a MOST control unit leads to disturbances in the entire MOST framework.

Fault patterns that occur are e.g.:

• rhythmic recurring crackling noises in the audio system
  
• Control Display (CD) remains white or dark, which means that no vehicle functions can be called up via the Control Display.
  

If the fault ”Cutoff excess temperature” is stored in one or more MOST control units, the following Service Information must be taken into account:

TIS ->Document -> Service information -> Enter SI Number

SI number: 65 16 02942

Top HiFi amplifier: Detection of excess temperature

The Top HiFi amplifier can also only disable its functions at high temperatures. If the customer is currently listening to music, the following fault pattern results:

• Sound failure in the audio system.
  

The Top HiFi amplifier does not make a fault code memory entry. The MOST framework remains functional. After the control unit has cooled down, the Top HiFi amplifier is functional once again!