LEMON Manuals: Even more car manuals for everyone
Home >> Mercedes Benz >> 2008 >> C350 >> Repair and Diagnosis >> Electrical >> Motors, Switches, Relays >> Electrical System - Basic Knowledge - C63/C350 (204) - 2 Of 3 >> Basic Knowledge >> Telephone switch-on/switch-off characteristics, function - GF82.70-P-2007CWJ

Telephone switch-on/switch-off characteristics, function - GF82.70-P-2007CWJ

MODEL 204.0 /2 with CODE (498) Japan version up to Model Year 8 

Function requirements 

IMPORTANT The connector is used to connect the various mobile phones to the communication control unit.

IMPORTANT A Bluetooth-compatible mobile phone can only be operated in the vehicle if a mobile phone is not connected to the connector.

IMPORTANT The function is described with a mobile phone attached to the connector. Any differences with a mobile phone not attached to the connector or one operated using Bluetooth are described as information points in each respective component function.

General 

For status "circuit 30 ON" the COMAND controller unit has to be manually switched on so that the mobile phone is switched on via a wake-up pulse from the COMAND controller unit.

For status "circuit 15R ON" the COMAND controller unit is automatically switched on; this in turn also automatically switches on the mobile phone by means of a wake-up pulse from the COMAND controller unit.

The mobile phone can be switched off at status "circuit 30 ON" by manually switching off the COMAND controller unit, which sends a corresponding signal to the mobile phone, or following expiration of the run-on time as configured on the mobile phone.

The mobile phone is switched off automatically at status "circuit 15R OFF" by the COMAND controller unit, which sends a corresponding signal to the mobile phone, or following expiration of the run-on time as configured on the mobile phone.

IMPORTANT A mobile phone not attached to the connector and operated over Bluetooth can only be switched on or off using the buttons on the mobile phone.

The switch on/off characteristics function consists of the following component functions:

Switch on function sequence 

The switch on signal (wake-up pulse) is forwarded by the COMAND controller unit as follows to the mobile phone:

The mobile phone is then switched on and supplied with power. If configured on the mobile phone, the lock-code query is presented after switching on the mobile phone.

The lock-code query is forwarded from the COMAND controller unit over a low voltage differential signaling (LVDS) line to the Audio/ COMAND display (A40/8) and over the interior CAN to the display in the instrument cluster (A1).

Depending on the request concerned the lock-code must be entered by one of the following options:

The control signals of the mobile phone buttons are forwarded in the following way to the COMAND controller unit:

The control signals from the COMAND controller unit telephone buttons are processed internally.

After entering the lock-code, the reception status is received by the COMAND controller unit in the following way over the multifunction antenna (A28/11):

The reception status is shown when the COMAND controller unit sends it over an LVDS line to the Audio/COMAND display.

A mobile phone not connected to the connector and operated over Bluetooth processes the switch-on signal internally in the mobile phone. The display of the lock-code query, if configured on the mobile phone, is only shown on the mobile phone display. The lock-code can only be entered using the mobile phone buttons. The reception status is received by the mobile phone's antenna. The display of the lock-code and the reception status as well as the signals of the mobile phone buttons are processed internally in the mobile phone.

Switch off function sequence 

The switch off signal (corresponding signal) is forwarded by the COMAND controller unit to the mobile phone in the following way:

IMPORTANT The mobile phone is then switched off and power supply interrupted. Expiration of the run-on time configured in the mobile phone takes place internally in the mobile phone.

A mobile phone not connected to the connector and operated over Bluetooth processes the switch-off signal internally in the mobile phone. If the rechargeable battery of the mobile phone is empty, the mobile phone is also switched off. This process also runs internally in the mobile phone.

REFER TO SYSTEM WIRING DIAGRAMS Electrical function diagram for switch on/off characteristics, establishing, accepting and ending calls   PE82.70-P-2056-99FAA
  Front central operating unit, component description A40/9 GF54.21-P-4500CW
  Cockpit central display, component description A40/8
High
GF54.30-P-6100CWH
  Telephone and GPS roof antenna component description A28/11 GF82.62-P-4119CW 
  Bluetooth antenna component description A2/91 GF82.62-P-4201CW 
  Speaker system, component description H4/1, H4/2, H4/3, H4/4, H4/27Except code (810) Sound system GF82.62-P-4220CW 
H4/1, H4/2, H4/3, H4/4, H4/27, H4/29, H4/54, H4/57 with CODE (810) Sound system GF82.62-P-4220CWS 
  Handsfree system microphone, component description B25/7 GF82.70-P-4121CW 
  Audio tuner control unit, component description N40/3
with CODE (810) Sound system
GF82.62-P-3132CWS 
  Communication control unit, component description N123/6 GF82.70-P-5003CWJ 
  Mobile phone interface, component description X39/37 GF82.70-P-5004CWJ 
  COMAND controller unit, component description A40/3 GF82.85-P-3136CWJ