Internal power supply control device having at least one lighting control device for a motor vehicle

1. A combination ( 10 ) comprising:

a power-supply control device ( 12 ) including a power distribution center in a motor vehicle that acts to control appliances in the motor vehicle having light sources and monitors their functions, said power distribution center further operable to be used with incandescent lamps or with semiconductor light sources, wherein the incandescent lamps and the semiconductor light sources having different properties; and

at least one electronic light-control unit ( 14 ) operating at least one semiconductor light source ( 36 , 38 ), wherein said power-supply control device ( 12 ), and the appliances including the at least one electronic light-control unit ( 14 ) connected thereto are disposed in various locations in the motor vehicle and connected to one another via lines, wherein the power supply control device ( 12 ) supplies the electronic light-control unit ( 14 ) with power via a supply line ( 18 ) connected to a first connection pin ( 20 ) of said power-supply control device ( 12 ), monitors currents flowing through an additional connection pin of said power-supply control device ( 12 ), and makes use of diagnoses of an appliance connected to the additional connection pin, the electronic light-control unit ( 14 ) is connected to the additional connection pin ( 28 ) of said power-supply control device ( 12 ) via an error line ( 26 ) and checks the function of the connected semiconductor light source ( 36 , 38 ) and, in the case of a malfunction, triggers a current flow in the error line ( 26 ), and said power-supply control device ( 12 ) reacts to the triggered current flow to generate an error message.

2. The combination ( 10 ) according to claim 1 , wherein said at least one electronic light-control unit includes first and second electronic light-control units ( 14 , 16 ), said electronic light-control units ( 14 , 16 ) acting to control the semiconductor light sources ( 36 , 38 ).

3. The combination ( 10 ) according to claim 2 , wherein the electronic light-control units ( 14 , 16 ) comprise a safeguarding and monitoring circuitry ( 40 , 42 ) that detects malfunctions of the respective connected semiconductor light sources ( 36 , 38 ) or ensures at least one of a temperature safeguarding or an electromagnetic compatibility or ensures a safeguard against a polarity reversal.

4. The combination ( 10 ) according to claim 3 , wherein in the case of the malfunction, the safeguarding and monitoring circuitry ( 40 ) is adapted to engage a normally disengaged switch ( 44 ), and wherein when the switch ( 44 ) is engaged, the error line ( 26 ) is connected to a ground connection ( 48 ).

5. The combination ( 10 ) according to claim 4 , wherein said first and second electronic-light-control units ( 14 , 16 ) each include a ground connection ( 48 ) and a resistance of a current path, which lies between the ground connection ( 48 ) of said first electronic light-control unit ( 14 ) and a connection ( 62 ) of said second electronic light-control unit ( 16 ) at the error line ( 26 ), has a different value than a resistance of a current path lying between the ground connection ( 48 ) of said second electronic light-control unit ( 16 ) and the connection ( 62 ) of said second electronic light-control unit ( 16 ) at the error line ( 26 ).

6. The combination ( 10 ) according to claim 2 , wherein the electronic light-control units ( 14 , 16 ) are connected to the shared error line ( 26 ).

7. The combination ( 10 ) according to claim 2 , wherein a control circuitry ( 34 ) of the power-supply control device ( 12 ) shuts off and again activates individually the electronic light-control units ( 14 , 16 ) and is connected to the shared supply line ( 26 ) successively for a short period of time until the malfunctioning electronic light-control units ( 14 , 16 ) are identified.

8. The combination ( 10 ) according to claim 2 , wherein the power-supply control device ( 12 ) shuts off and again activates the electronic light-control units ( 14 , 16 ) connected to the shared error line ( 26 ) successively such that only one of the light-control units ( 14 , 16 ) is shut off at a time.

9. The combination ( 10 ) according to claim 2 , wherein said first and second electronic light-control units ( 14 , 16 ) are collectively connected via a shared supply line ( 66 ) to the first connection pin ( 20 ) of the power-supply control device ( 12 ), said first electronic light-control unit ( 14 ) is connected to a second connection pin ( 24 ) of the control device ( 12 ) via an error line ( 68 ), and said second electronic light-control unit ( 16 ) is connected to the additional connection pin ( 28 ) of the power-supply control device ( 12 ) via an error line ( 70 ).

10. The combination ( 10 ) according to claim 1 , wherein the power-supply control device ( 12 ) is programmed to evaluate a current flow in the error line ( 26 ) as a malfunction of an appliance connected to said error line ( 26 ) and at least one of issue and store a corresponding error signal.

11. The combination ( 10 ) according to claim 1 , wherein the power-supply control device ( 12 ) activates an error lamp ( 60 ) or transmits the error message to an infotainment system of the vehicle or stores the error message in a readable memory.