초록 ▼

In a diagnostic method and apparatus for a vehicle, a transponder for performing a communication with an external receiver and an engine ECU are connected on a communication line. During a first inappropriate period in which noises are supposed to occur on the communication line due to engine starti

In a diagnostic method and apparatus for a vehicle, a transponder for performing a communication with an external receiver and an engine ECU are connected on a communication line. During a first inappropriate period in which noises are supposed to occur on the communication line due to engine starting or a second inappropriate period in which a processing load necessary for a control is supposed to be high when the engine speed is high or a load is high, even if there is a request for outputting abnormality information from the transponder, the engine ECU does not respond to the request. On the other hand, when it is not during the first and second inappropriate periods, the ECU responds to the output request from the transponder.

대표청구항 ▼

[ What is claimed is:] [1.] A diagnostic apparatus for a vehicle which communicates with a management center provided away from the vehicle, comprising:a control unit for controlling various devices mounted on a vehicle and diagnosing conditions of the various devices; anda communication unit which

[ What is claimed is:] [1.] A diagnostic apparatus for a vehicle which communicates with a management center provided away from the vehicle, comprising:a control unit for controlling various devices mounted on a vehicle and diagnosing conditions of the various devices; anda communication unit which is connected to the control unit via a communication line and transmits a result of diagnosis by the control unit to the management center,wherein the control unit is programmed to discriminate at least one of a first inappropriate period in which noises are supposed to occur on the communication line due to engine starting and a second inappropriate period in which a process load required to control the various devices is supposed to be larger than a predetermined value, the control unit is programmed to disable a response thereof to the communication unit during the inappropriate period, even if there is a request for outputting the diagnosis result to the communication unit.