Method for evaluation of the self-diagnosis of a controller in a motor vehicle
First Claim
1. Method for evaluating operability of a self-diagnostic system of a control unit in a motor vehicle, said control unit having a control panel with a push-button switch with automatic return, further positionable input elements, and a signal element for emitting a flashing code, said method comprising the steps of:
- dividing types of faults which can be diagnosed into fault classes, each type of fault being assigned a fault number within a fault class;
an operator selecting a fault class by setting said positionable input elements to a predetermined position combination associated therewith;
said operator operating said push-button switch while said positionable elements are in said predetermined position combination; and
said signal element emitting flashing code signals concerning status of the types of faults included in the selected fault classes.
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Abstract
The invention provides a method for evaluating the self-diagnostic system of a controller in a motor vehicle having a control panel with a push-button switch with automatic return, and additional input elements and having a signalling element which is suitable for emitting a flashing code. In order to emit a structured flashing code of fault numbers, the range of possible faults which can be diagnosed is divided into fault classes, the faults within a fault class being assigned fault numbers which can be emitted, separated on the basis of fault classes, by flashing code. A specific fault class is selected by the operator by setting the input elements to a specific position combination which is assigned to the fault class, and operation of the push-button switch (for example, the recirculation push-button in the case of a heating controller).
17 Citations
13 Claims
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1. Method for evaluating operability of a self-diagnostic system of a control unit in a motor vehicle, said control unit having a control panel with a push-button switch with automatic return, further positionable input elements, and a signal element for emitting a flashing code, said method comprising the steps of:
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dividing types of faults which can be diagnosed into fault classes, each type of fault being assigned a fault number within a fault class; an operator selecting a fault class by setting said positionable input elements to a predetermined position combination associated therewith; said operator operating said push-button switch while said positionable elements are in said predetermined position combination; and said signal element emitting flashing code signals concerning status of the types of faults included in the selected fault classes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. Apparatus for evaluating operability of a self-diagnostic system of a vehicle heating control unit having a control panel with a push-button switch with automatic return for selecting an air recirculation mode, first and second temperature selection wheels, each having a MIN position and a MAX position, and a recirculation indicating lamp for emitting flashing code signals, said apparatus comprising:
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a memory having stored therein a plurality of fault numbers, one such fault number corresponding to each type of fault which can be diagnosed, such types of faults which can be diagnosed being divided into two classes; means for recognizing a selected class of faults in response operation of said push-button switch, with said temperature selection wheels being set to a predetermined position combination associated with said selected class of faults; means for causing said recirculation indicating lamp to emit flashing code signals concerning status of the types of faults included in the selected class. - View Dependent Claims (12, 13)
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Specification