JPS63163445U - - 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 processing on the ECU side when erasing diagnosis data on the ECU side, Fig. 17 is a flowchart showing processing on the tester side for multi-display, and Fig. 18 is a flowchart showing processing on the tester side when deleting diagnosis data on the ECU side. FIG. 19 is a circuit diagram for hardware-based detection of ROM pack dislodgement according to the embodiment; FIG. 19 is a diagram showing the stored contents of a memory for software-based detection of ROM pack dislodgement according to another embodiment of the present invention; 20th
FIG. 21 is a diagram showing a conventional connector for checking a self-diagnosis signal, FIG. 21 is a diagram showing the location of the connector, and FIG. 22 is a circuit diagram for displaying a conventional self-diagnosis signal. 31...Tester, 32...Display device, 37...
ROM, 42...Multiplexer, 43...CP
U, 46...Keyboard, 51...Exclusive OR circuit, 52...Inverter.

Amendment January 30, 1983 The brief description of the drawing is amended as follows. On page 26, 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 output from n electronic control devices mounted on the vehicle or various RAM data are transferred, and one of the In a vehicle that has a type 1 centralized connector to which switching signal lines output from each electronic control unit that outputs logic levels are connected, the tester body with various diagnostic functions and a tester unit specific to the model and year of the vehicle a memory pack in which data is stored, a first connector terminal group provided on the tester main body side to which this memory pack is attached, and a second connector terminal group provided on the memory pack side connected to this first connector terminal group.
a first circuit means for supplying a signal at a constant logic level to at least two terminals of the second connector terminal group; and a second circuit means for supplying a signal at a constant logic level to at least two terminals of the second connector terminal group. The tester is characterized by comprising a logic circuit that takes the logic of the terminals of the first connector terminal group connected to the terminals, and interrupts the CPU of the tester body according to the level of the logic circuit. Diagnostic multi-function tester.