JPS63135437U - - Google Patents

Description

[Brief explanation of the drawing]

Fig. 1 is an external perspective view of a self-diagnosis multifunctional tester according to the present invention, Fig. 2 is a perspective view showing the bottom of the tester, Fig. 3 is a block diagram showing the control circuit of the tester, and Fig. 4 is a perspective view of the tester. A flowchart showing the operation of the tester when the connector of the tester is connected to the connector of the vehicle. Fig. 5 shows the format of the R-232c code. Fig. 6 shows the data transfer between the tester and the ECU. Figure 7 is a flowchart showing data communication processing on the ECU side that performs data communication with the tester, Figure 8 is a flowchart showing processing on the tester side of the data communication processing, and Figure 9 is a flowchart showing the processing on the ECU side in forced drive of the actuator. Flowchart showing the process; Figure 10 is a flowchart showing the process on the tester side when the actuator is forced to drive; Figure 11 is a flowchart showing the process on the tester side when setting the communication data rate; Figure 12 is a flowchart showing the process on the tester side when setting the communication data rate. Flowchart showing the processing on the ECU side to detect the
Figure 4 is a diagram showing the means for setting the model and vehicle type.
Figure 5 is a flowchart showing the process on the tester side when erasing the diagnosis data on the ECU side.
Fig. 16 is a flowchart showing the processing on the ECU side when erasing the diagnosis data on the ECU side, Fig. 17 is a flowchart showing the processing on the tester side to perform multi-display, and Fig. 18 is a flowchart showing the processing on the tester side when erasing the diagnosis data on the ECU side. Diagram showing the connector for checking the signal,
Figure 19 is a diagram showing the location of the connector,
FIG. 0 is a circuit diagram that displays a conventional self-diagnosis signal. 31...Tester, 32...Display device, 37...
ROM, 42...Multiplexer, 43...CP
U, 46...Keyboard.

Amendment January 30, 1983 The brief description of the drawing is amended as follows. On page 24, line 7 of the specification, the phrase "R-232c code" is corrected to "RS-232c code."

Claims (1)

[Scope of utility model registration request] The first to nth signal lines taken out for each electronic control device to which self-diagnosis output signals or various data output from the n electronic control devices mounted on the vehicle are transferred, and the logic of either one at any time. In a vehicle having a first type centralized connector connected to a switching signal line output from each electronic control device outputting a level, a second type centralized connector connectable to the first type centralized connector, and a second type centralized connector connectable to the first type centralized connector; a setting circuit for setting the logic level of the signal line to the logic level of the other signal line; a selection circuit for selecting the signal via the first to nth signal lines; and a selection circuit for selecting the signal via the first to nth signal lines. A serial/parallel converter circuit that performs serial/parallel conversion, a transmitter/receiver circuit that transmits and receives signals via the first to nth signal lines, and control means that controls data transmission and reception via the transmitter/receiver circuit, When the specific bit of the signal via the first to nth signal lines is at a specific level, each electronic control unit drives its own actuator, and when the specific bit of the signal via the first to nth signal lines is at a level other than the specific level. A multifunctional tester for self-diagnosis, characterized in that it transmits and receives memory information or various data of each electronic control unit.