JPH0293173U - - Google Patents

Description

[Brief explanation of drawings]

Fig. 1 is a configuration block diagram showing an embodiment of a vehicle control device having a diagnostic function according to this invention, Fig. 2 is a flowchart for explaining the operation of Fig. 1, and Fig. 3 is a failure part display. Timing chart showing the display status of failure parts using LEDs, No. 4
The figure is a timing chart of a serial data request signal and a serial data transmission signal, FIG. 5 is a signal waveform diagram of the main part of FIG. 1, and FIG. 6 is a configuration showing an example of a conventional vehicle control device with a diagnostic function. A block diagram, FIG. 7 is a flowchart explaining the operation of FIG. 6, FIG. 8 is a flowchart showing the process of operation every time a vehicle speed pulse is input, and FIG. 9 is a function of the indicator lamp in FIG. 6. A block diagram explaining the switching logic, FIG. 10 is a waveform diagram showing the state of display of the operating memory by the indicator lamp, and FIG. 11 is a flowchart showing a part of another example of the operation of the control calculation circuit in FIG. 6. , FIG. 12 is a functional block diagram of the operation of the control arithmetic circuit in FIG. 6. 1a, 1b, and 1c are wheel speed sensors, 10 is a control calculation circuit, 5c is an actuator for controlling brake hydraulic pressure, and 14 is an output monitoring circuit.

Claims (1)

[Scope of utility model registration request] Wheel speed sensors 1a, 1b, and 1c provided in connection with the wheels of the vehicle, a control calculation circuit 3 that receives signals from the wheel speed sensors, and a brake hydraulic pressure control that receives actuation signals based on the operation of the control calculation circuit. an output monitoring circuit 5e that inputs a signal corresponding to the operating status of the actuator 5c and the actuator for controlling brake hydraulic pressure, and outputs a signal for canceling the brake hydraulic control to the actuator when the input signal is abnormal. In the vehicle control device having a diagnostic function, the control calculation circuit 10 performs a failure diagnosis of the sensor based on at least a detection signal from the wheel speed sensor, and displays the diagnosis result on a display element 17. What is claimed is: 1. A vehicle control device having a diagnostic function, characterized in that it outputs a diagnostic signal that can be supplied to a diagnostic device.