G12�Voltage�Supply�and�Bus�Systems
Contents
1. Bus�Systems..........................................................................................................................................................................................................................................1
1.1. Bus�overview................................................................................................................................................................................................................. 1
1.2. Main�bus�systems.................................................................................................................................................................................................3
1.2.1. K-CAN.................................................................................................................................................................................................... 3
1.2.2. PT-CAN................................................................................................................................................................................................ 4
1.2.3. FlexRay..................................................................................................................................................................................................5
1.2.4. Ethernet............................................................................................................................................................................................... 6
1.2.5. D-CAN................................................................................................................................................................................................10
1.3. Sub-bus�systems...............................................................................................................................................................................................10
1.3.1. LIN-Bus............................................................................................................................................................................................ 10
1.3.2. Local�CAN....................................................................................................................................................................................21
1.3.3. USB........................................................................................................................................................................................................ 21
1.4. Diagnosis�access�OBD2........................................................................................................................................................................ 21
2. Control�Units.................................................................................................................................................................................................................................... 22
2.1. Installation�locations�of�control�units................................................................................................................................. 22
2.2. Gateway............................................................................................................................................................................................................................ 26
2.2.1. Body�Domain�Controller�(BDC)................................................................................................................. 26
2.3. Control�units�on�the�MOST�bus................................................................................................................................................ 29
2.3.1. Head�unit....................................................................................................................................................................................... 29
2.3.2. Hi-fi�amplifier�with�MOST�bus.....................................................................................................................30
2.3.3. Rear�seat�entertainment�(RSE).................................................................................................................. 31
2.4. Control�units�on�the�K-CAN2.........................................................................................................................................................32
2.4.1. Roof�function�center�(FZD)...............................................................................................................................32
2.4.2. Tailgate�function�module�(HKFM).......................................................................................................... 32
2.4.3. Seat�modules......................................................................................................................................................................... 33
2.4.4. Seat�pneumatics�modules.................................................................................................................................33
2.5. Control�units�on�the�K-CAN3.........................................................................................................................................................34
2.5.1. Front�Light�Electronics............................................................................................................................................34
2.5.2. Rear�view�camera�(RFK)........................................................................................................................................34
2.5.3. Parking�Manoeuvre�Assist�(PMA).......................................................................................................... 35
2.5.4. Blind�spot�detection�(SWW)........................................................................................................................... 35
2.6. Control�units�on�the�K-CAN4.........................................................................................................................................................36
2.6.1. Active�Sound�Design�(ASD)............................................................................................................................36
2.6.2. Controller�(CON)................................................................................................................................................................37
2.6.3. Integrated�automatic�heating�/�air�conditioning�(IHKA)......................................... 37
2.6.4. Light�Effect�Manager�(LEM)........................................................................................................................... 38
2.6.5. Telematic�Communication�Box�(TCB)............................................................................................. 39
2.7. Control�units�on�the�K-CAN5.........................................................................................................................................................40
2.7.1. Remote�control�receiver�(FBD)...................................................................................................................40
