General system description, speech input control unit -J507

The speech input control unit -J507 is built into the radio as a plug-in module. Its voltage supply and interface to the MOST bus are provided via the port in the K-box. The link is made via the electric MOST bus. It is a fully featured control unit with a dedicated MOST address and address word in self-diagnosis. The "Help" command calls up for the driver

the commands which can be executed at the current user operating level. This significantly enhances driving safety as well as ride comfort.

All the input and output signals, as well as the voltage supply, are

provided via the plug-in contacts in the radio. The optical MOST bus is converted into an electrical data bus. This is only possible based on shielding from electromagnetic interference provided by a metal housing, and based on the short transmission distances.

 

Preconditions for SDS voice control operation:

IThe software versions of the MMI units, especially the head unit and SDS, match.

IThe multi-function steering wheel with the PTT button is fitted.

IThe necessary microphones are fitted, wired and coded on the telephone and the DSP amplifier.

IIf a mobile phone prefitting (telephone transmitter and receiver unit -R36) is additionally fitted in the vehicle, the mobile phone prefitting's voice control must be decoded (see Coding telephone -R36).

 

No special commissioning measures are required. The HU detects the presence of an SDS in the MOST loops and automatically downloads the necessary program modules (known as GDDs) from the SDS.

This operation is performed the first time the MMI switched on after replacing an SDS module or the HU, after a change of language on the SDS or after an SDS software update, and takes about 2 minutes.

In this time no MMI/SDS functions should be activated - that is, no PTT input, no diagnosis, no switching off the MMI.

 

Voice control is designed to work with the following subsystems:

• Navigation
• Telephone incl. mailbox and hands-free
• Radio
• TV
• CD changer
• etc.

 

 

The speech input control unit -J507 must be enabled when being replaced and for component protection.

The following functions are also available (see relevant test programs):

- Read measured value block

- Read/erase fault memory

- Control element test as self-test

- Replace control unit

- Deactivate component protection.

 

Note

The SDS language can only be changed by way of an update CD (control unit flash) or by replacing the voice control.

 

Interrogating for control unit version

The following information can be read from the control unit:

Component designation with software status

Part number of control unit                    J 4E0 ... ... ...   

Coding, if implemented in control unit

Workshop code of last workshop which wrote data to the control unit

 

Expanded information:

 

Manufacturer works number

Control unit date of manufacture

Manufacturer modification status number

Manufacturer test status number

Manufacturer serial number

 

Control unit serial number