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Title:
VEHICLE CONTROL COMPUTER SYSTEM HAVING SELF-CHECKING FUNCTION
Document Type and Number:
Japanese Patent JPH0720007
Kind Code:
A
Abstract:

PURPOSE: To improve the serviceability of the self-checking function of a vehicle control computer system so as to improve the reliability and safety of the system by displaying that a diagnostic code or control data stored in accordance with the detection of abnormality in a computer has been initialized.

CONSTITUTION: A computer section l is provided with an input interface circuit 13, A/D converter 14, and output interface circuit 15 in addition to a CPU 11 and memory 12. A sensor section 2 is incorporated with test switches 28 and 29 for controlling a self-checking function in addition to an O2 sensor 21 and water sensor 22. An actuator section 3 is incorporated with a diagnosed result displaying section 31 for displaying the self-checking function. The diagnostic code/control data initialization displaying means of the CPU 11 makes the section 31 to display that a diagnostic code or control data stored in the memory 12 has been initialized in accordance with the detection of abnormality in the memory 12 or power source of the computer section 1 or an incomplete normality discrimination displaying means makes the section 31 to display that normality discrimination by the self-checking function has not been completed.


Inventors:
Ikezoe, Akira
Application Number:
JP1993000149034
Publication Date:
January 24, 1995
Filing Date:
June 21, 1993
Export Citation:
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Assignee:
FUJITSU TEN LTD
International Classes:
G01M17/007; (IPC1-7): G01M17/007
Attorney, Agent or Firm:
宇井 正一 (外4名)