Failure diagnosis system for vehicle

• US 4,817,418 A
• Filed: 10/26/1987
• Issued: 04/04/1989
• Est. Priority Date: 05/15/1985
• Status: Expired due to Term

• Current Assignee: Nippondenso Co., Ltd. (DENSO Corporation), Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Nippondenso Co., Ltd. (DENSO Corporation), Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Hori, Shinichi, Tamura, Kimio, Asami, Ken, Sakai, Kazunori, Okuda, Yutaka, Nakashima, Noriyuki
• Primary Examiner(s): Tokar, Michael J.
• Assistant Examiner(s): Raevis, Robert R.
• Application Number:
  US07/113,327
• Time in Patent Office: 526 Days
• Field of Search: 73/118.1, 73/119 R, 73/119 A, 73/117.3, 73/117.2, 73/116, 364/550, 364/551, 340/52 F, 371/29, 371/15
• US Class Current: 73/114.77
• CPC Class Codes: B60T 8/885 using electrical circuitry
• CPC Class Codes: F02D 41/22 Safety or indicating devices for abnormal conditions in air/fuel ratio feedback systems F02D41/1495, in electric control linkage F02D11/107, in purge control systems F02M25/0809
• CPC Class Codes: G01R 31/007 using microprocessors or computers
• CPC Class Codes: G07C 5/0808 Diagnosing performance data testing of vehicles G01M17/00; testing of electrical installation on vehicles G01R31/005
• CPC Class Codes: Y02T 10/40 Engine management systems

Abstract

A failure diagnosis system for a vehicle includes a failure detection means for detecting failures of devices or apparatuses installed in a vehicle, a storage means for storing failure information detected by the failure detection means, a failure display means for displaying failure information stored in the storage means, a time information means for adding failure information detected by the failure detection means and stored in the storage means to time information showing the time when the failure information is detected, a retrieval time input means for inputting a retrieval time and a selective display means for displaying selectively failure information which has time information being within the retrieval time.

Claims

1. A failure diagnosis system for a vehicle comprising:

a failure detection means for detecting failure of vehicle components, said failure detection means outputting failure information;

a storage means for storing the failure information outputted by said failure detection means;

a failure display means for displaying the failure information stored in said storage means;

a time information additional means for combining time information indicative of the time when failure of vehicle components is detected with said failure information outputted by said failure detection means, said time information means outputting time of failure information to said storage means;

retrieval time input means for selecting a retrieval time; and

a selective display means for selectively displaying a combination of failure information and time information within said retrieval time.

2. The failure diagnosis system of claim 1, wherein a measurement of the distance driven by the vehicle is used as the time information.

3. The failure diagnosis system of claim 1, wherein a counter is used to count the number of operations of an ignition switch in said vehicle and wherein the number of operations of the ignition switch is used as the time information.

4. The failure diagnosis system of claim 1, wherein said time information means comprises a timer.

5. The failure diagnosis system of claim 1, wherein said time information means comprises a counter.