The main unit uses the following information
DATA FOR MAIN UNIT
| Information | Values | From | The value depends on the following sensor input, signal or function |
|---|---|---|---|
| Ignition +B | ON/OFF | DICE | Ignition switch. The main unit uses the +B information only as logic voltage. |
| Key correct | - | TWICE | Immobilization function. The main unit uses the information for the theft protection function of the audio system. |
| CD changer information | Current settings | CDC | Information on a CD and its location. The main unit sends the information over the bus as text information to the SID, which shows the current setting on the display. |
| Vehicle speed | km/h, mph | MIU | Rear left wheel speed (lead from ABS). The main unit uses the information for the "speed-dependent volume" function. |
| Steering wheel controls | Seek, Seek <<, Vol +, Vol -, NXT, SRC | SID | Button control module input. The main unit uses the information to control the function (perform the command) selected with the steering wheel controls. |
| Rheostat level | 0-100% | SID | Rheostat control module input. The main unit uses the information to control the light intensity on the front display of the main unit. |
| Rheostat Night Panel | 0-100% | SID | Rheostat control module input reduced internally by a fixed value. The main unit uses the information to control the brightness of the Night Panel on its front display. |
| Night Panel | ON/OFF | SID | Button. The main unit uses the information to switch the Night Panel function on/off. When switched on, the light intensity on the main unit front display is reduced. |
| Display lighting | 0-100% | SID | Rheostat control module input or light sensor, highest value. The main unit uses the information to control the light intensity on the front display of the main unit. |
| Diagnostics communication | DICE/diagnostic tool | Control module should be live and the bus leads intact. For further information on the bus, see BUS AND DIAGNOSTICS COMMUNICATION . |