Signal Missing

Signal missing

Checking the component
The infotainment module (ICM) has registered loss of communication with the Accessory USB unit (AUU).
If the fault is intermittent, it has been registered previously but is no longer present. Intermittent faults may occur at start up of the Accessory USB unit (AUU) or may be a different type of fault that occurs on different occasions. The fault is evaluated depending on how it occurs.
In the event of a permanent fault, replace the Accessory USB unit (AUU).
Remedy as necessary.

Other information
- Universal Serial Bus (USB) Module Universal Serial Bus (USB) Module





Continue - Verification

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Fault-tracing information

Attempt New Test - Checking the component

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Verification

Hint: After carrying out the repair, check that the fault has been remedied.

- Ignition off.
- Reinstall the connectors, components etc.
- Ignition on.
Check function of the Accessory USB Unit (AUU).

Is the system working?

Yes - FAULT FOUND

No - Fault-tracing information

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