The invention relates to a mobile diagnostic device for motor vehicles, comprising
a first interface for forming a data connection with
a diagnostic interface of the motor vehicle electronics and at least
a processor unit for controlling the first interface and
for reading diagnostic data from a fault memory of the motor vehicle electronics.
Diagnostic devices are used
Maintenance and fault detection in today's modern motor vehicles
with the help of computerized systems. In the automotive electronics
the individual control units are networked with each other. At the
Occurrence of an error will be diagnostic data in the corresponding
Control unit stored and an error entry in a fault memory
a diagnostic interface
the stored data and also current operating data from the
Automotive electronics are read out. The diagnostic interface
is usually called a so-called OBD (on-board diagnostics) plug
trained, which is usually
located inside the vehicle below the dashboard. For reading certain
Vehicle parameters and operating values, in particular exhaust gas values,
The core of the diagnostic interface is standardized on most motor vehicles.
The diagnostic data read out are integrated in a diagnostic device
Data processing system evaluated. With most devices will
with the help of a vehicle-specific software a repair proposal
to correct the detected error. These known diagnostic devices afford
thus the reading out and the evaluation of the diagnostic data and the
Create one or more repair suggestions, resulting in a complex
Construction and therefore leads to high cost of the diagnostic device. by virtue of
of the high price most workshops only afford one
to be successively connected to the vehicles submitted for repair.
Because the known diagnostic equipment
also have comparatively long readout and evaluation times,
Fault diagnosis frequently
in the clearance of customers who are looking for a quick analysis of the
State of their vehicle are interested.
Invention is based on the object, quickly and without great technical
Expense to carry out a first state analysis of the vehicle electronics
Task is with a mobile diagnostic device of the type described above
Sort of solved,
the invention thereby
is characterized in that it has a data memory for storing the
queried diagnostic data, a warning device when reading
an error entry from the fault memory of the motor vehicle electronics
generates a warning signal, and a second interface for forming a
Having data connection with a data processing system.
Diagnostic device according to the invention allowed
thus a short diagnosis of the electronics of motor vehicles. To
Connecting to the electronics of a motor vehicle to be tested via the
First interface begins the diagnostic device with the processing of diagnostic steps.
If an error entry is found, the
Warning device issued an error message, and the corresponding
Diagnostic data is stored in the data memory. The immediate one
Generating and displaying a warning signal makes it quick and easy
Answering the question of whether in motor vehicle electronics error entries are present
and whether diagnostic data must be evaluated. A detailed evaluation
the diagnostic data is provided by means of a data processing system,
like a computer connected to the diagnostic device via the second interface
and to which the diagnostic data to be evaluated is transmitted.
The read diagnostic data are in the diagnostic device only
stored and only on the presence of an error entry
examined, resulting in a simplified structure and low production costs
Inventive diagnostic device leads. at
a connection of the diagnostic device
with the motor vehicle, the power supply via the diagnostic interface
made the motor vehicle. During operation of the diagnostic device during the
Connection to a data processing system, it receives its power from
the plant. The diagnostic device
can additionally one
own power supply, such as a battery, have.
The diagnostic device
thus represents an independent
Unit to perform
of diagnostic steps on a motor vehicle or in the motor vehicle electronics
and can be operated without a connected data processing system.
In a preferred embodiment of the diagnostic device according to the invention, the warning device is designed as a visual and / or acoustic display. An optical display, such as a warning lamp or a display, provides a quick visual error message to the operator of the diagnostic device. The warning device is preferably set up such that the warning signal is displayed further after completion of all diagnostic steps, for example, a warning light remains lit. An audible indicator, such as a warning tone, lends itself to a brief message every time it is read and in particular as an additional signal Completion of all diagnostic steps, in other words after checking the complete vehicle electronics.
a further preferred embodiment
the diagnostic device according to the invention is the first
Interface can be connected to the OBD interface of the motor vehicle and
preferably designed as a multi-adapter. A connection possibility
to the most common
Vehicle types in the core standardized OBD interface allows use of the
Inventive diagnostic device independent of
Vehicle type. Typically, the signals of the processor unit via a
Multiplexer routed to the respective OBD pin assignment. Training
The interface as a multi-adapter allows the use of the diagnostic device at different
Vehicle types without additional
a preferred embodiment
the invention is the second interface as a USB interface
the USB interface may be the diagnostic device according to the invention to commercially available data processing systems,
for example, to a personal computer (PC), a "pocket" PC or a notebook,
is further, the first and / or the second interface of the diagnostic device according to the invention as interfaces
Form data link. In such an embodiment
of the diagnostic device according to the invention can
the attachment of data cables are dispensed with the diagnostic device, which
the ease of use and manageability of the mobile diagnostic device on
a preferred embodiment
the invention is the at least one processor unit on the
second interface programmable by the data processing system,
especially to the diagnostic interfaces and electronics of various
Vehicle types customizable. This results in the advantage that the
before use on a motor vehicle to be checked
can be configured accordingly. Depending on the vehicle type, series
and / or model year will be over
a software corresponding pin assignments of the diagnostic interface of the
Vehicle and diagnostic routines loaded into the diagnostic device,
then ready for
the specific vehicle is.
a further advantageous embodiment of the invention
the contents of the data store about
the second interface through the data processing system in one
Initial state can be reset.
The diagnostic data are usually present, but also during the
Analysis by the data processing system transferred to this
and at the latest
deleted after completion of the analysis from the data memory. The
Analysis results and also the diagnostic data can be stored in the data processing system
further processed, printed and / or archived. This in
reset the initial state
the next analysis
a vehicle ready.
is a method for reading diagnostic data of a motor vehicle
allows with the diagnostic device according to the invention,
wherein in a first method step, the first interface
a diagnostic interface of the automotive electronics connected
is, in a second process step, an error memory of
Automotive electronics by the diagnostic device whose at least one processor unit
when reading an error entry from the fault memory, the warning device activated
and stores the read diagnostic data in the data memory,
is read out and in a third step, the first
Interface is disconnected from the motor vehicle.
This method is error entries in the automotive electronics
not only queried and read diagnostic data, but errors
are displayed immediately by means of a preferred optical warning signal.
Upon completion of the quick procedure, the user knows
the diagnostic device,
whether the motor vehicle electronics has fault entries or a fault,
which may need further analysis. In this case, the inventive method
the advantage that a user of the diagnostic device not
is only displayed whether error entries in the automotive electronics available
are, but the data required for error analysis are already
in the data memory of the diagnostic device
before and can
from there for detailed vehicle diagnosis transferred to a data processing system
A preferred variant of the method is especially for the case
Error detection in a fourth step, the second
Interface of the diagnostic device
connected to a data processing system, and in the data memory
stored diagnostic data are evaluated. The analysis of the
Data storage stored diagnostic data takes place at the data processing system
and allows the user both to track the individual diagnostic steps
and tests as well as a determination of the error (s) that occurred.
A further advantageous variant of the method is characterized in that the diagnostic device is programmed by the data processing system before connection to the diagnostic interface of the motor vehicle according to the vehicle type to be examined. In the configuration the diagnosis device, which is performed before connecting to the motor vehicle electronics on the PC, the vehicle type adapted diagnostic steps are loaded on the diagnostic device and performed after connection to the automotive electronics in this. In a renewed connection of the diagnostic device to the data processing system, the read diagnostic data are processed according to the vehicle type and output an analysis result.
Prevention of malfunction of the diagnostic device may expediently
the contents of the data memory after evaluation by the data processing system
reset to an initial state
become. After resetting
is the diagnostic device
ready for use
a next one
Motor vehicle; In particular, it may be for another vehicle type
Another preferred variant of the method is the result
the essential process steps, connecting to the
Diagnostic interface of the automotive electronics, queries
of error entries
and the reading of diagnostic data and the disconnection of the diagnostic device from the motor vehicle,
carried out successively on several motor vehicles. These
Process variant allows a quick short diagnosis of several motor vehicles.
transfer the diagnostic data to the data processing system after each vehicle
and then later
be evaluated. After transferring
the diagnostic data on the data processing system is the data memory
and the diagnostic device
a next one
Motor vehicle can be configured. At the same time as the evaluation
the diagnosis data in the data processing system, the diagnostic device already
at the next
Be used motor vehicle and possibly further there
Query diagnostic data. However, it is also conceivable that the diagnostic device, the diagnostic data of several
Motor vehicles, in particular of the same type, receives and then a
to the evaluation system.
Diagnostic device according to the invention does not allow
just the quick display of existing error entries and
the reading and saving of diagnostic data, but allowed
an efficient and cost effective
Workshop operation through the use of multiple mobile diagnostic equipment, where
only a central data processing system for joint evaluation
the diagnostic equipment
Advantages of the invention will become apparent from the description of a preferred
of a diagnostic device according to the invention
1 a schematic structure of a diagnostic device according to the invention for motor vehicles.
In 1 is a diagnostic device 1 with a first interface 10 , a processor unit 11 , a data store 12 , a second interface 13 and a warning device 14 shown. The size and weight of the mobile diagnostic device 1 are chosen such that the diagnostic device 1 easily worn and preferably held in one hand. About the first interface 10 is the diagnostic device 1 to a diagnostic interface 2 connectable to a motor vehicle, not shown. The first data connection indicated by an arrow 20 between the diagnostic interface 2 and the diagnostic device 1 can be formed by a cable or wireless. About the second interface 13 can be a second data connection 30 with a data processing system 3 , here a computer. About the second data connection 30 can both in the data store 12 stored diagnostic data on the data processing system 3 be transferred to be processed on this, as well as the diagnostic device 1 through the data processing system 3 be configured. Thereby the processor unit becomes 11 programmed with appropriate diagnostic steps or diagnostic interfaces as well as the contents of the data memory 12 returned to an initial state.
The processor unit 11 controls the first interface 10 and leads over the first data connection 20 Diagnostic steps in the automotive electronics by. If any errors are found in this query, diagnostic data will be stored in the data store 12 filed, and a warning signal is issued via the warning device 14 output. The warning device 14 is designed as a control lamp. The lamp lights up permanently from the first storage process and goes out in a preferred variant only when resetting the diagnostic device 1 through the data processing system 3 After the diagnostic data on the second data connection 30 have been transferred to this. The second data connection 30 between the interface 13 and the data processing system 3 can be formed by a cable or wireless.
To diagnose fault entries of a motor vehicle electronics is a mobile diagnostic device 1 via a first interface 10 to the diagnostic interface 2 connectable to the motor vehicle. When finding an error entry is via a warning device 14 a preferred optical signal is displayed and diagnostic data in a data memory 12 stored. The diagnostic device 1 allows a quick and easy fault detection at the motor generates and stores the diagnostic data required for the evaluation in a data memory 12 between. The detailed error analysis takes place at a data processing system 3 instead, with the diagnostic device 1 then via a second interface 13 can be connected.