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Fault diagnosis device

A fault diagnosing device, a technology for faults, applied in the directions of measuring devices, testing electrical devices in transit, transportation and packaging, etc., can solve problems such as unclear memo diagnostic codes, difficulty in investigating the cause of failures, etc.

Inactive Publication Date: 2005-02-16
MITSUBISHI FUSO TRUCK AND BUS CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In any case, if a mechanic obtains a memorandum of diagnostic code information displayed on the display unit 5 and passes it on to another mechanic, it will lead to such confusion in some cases that it is not clear that the diagnostic code on the memo is Indicates current or past diagnostic codes
When such confusion occurs, it is difficult to investigate the cause of the failure

Method used

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Embodiment Construction

[0021] An embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a schematic diagram showing a connection between a fault diagnosis device according to this embodiment and an ECU mounted on a vehicle and designed to control an air suspension. The figure also shows a personal computer 11 (hereinafter abbreviated as PC) constituting the fault diagnosis apparatus. The PC 11 is connected to an ECU 13 as an electronic control unit mounted on the vehicle through a VCI 12 (Vehicle Communication Interface) as an interface device. The ECU 13 includes an ECU for engine control, an ECU for air suspension, and the like. PC11 and VCI12 are connected to each other through a multi-channel communication cable 14 , and VCI12 and ECU13 are connected to each other through a multi-channel communication cable 15 . One end of the multi-communication cable 15 is connected to the diagnosis connector 13d of the ECU 13 .

[0022] VCI12 has a func...

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PUM

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Abstract

The accident diagnosis device is mounted on a vehicle and can be connected to ECU 13 provided with a memory 13m capable of memorizing the present diagnosis code and the past diagnosis code. The device is provided with a display screen 31 for displaying the diagnosis state; and a simultaneous display means 22 for calling out the present diagnosis code and the past diagnosis code memorized in the memory 13m and simultaneously displaying both present diagnosis code and past diagnosis code on the display screen 31.

Description

technical field [0001] The present invention relates to a fault diagnosis device which diagnoses a fault of a vehicle such as a truck or a bus when the device is connected to an ECU (Electronic Control Unit) mounted on the vehicle. Background technique [0002] As shown in FIG. 7, there is generally known a fault diagnosis device for a vehicle electronic control system (see, for example, Japanese Patent Application KOKAI Publication No. 2002-91545). As shown in FIG. 7 , the fault diagnosis device 1 is connected to an on-vehicle ECU 3 (Electronic Control Unit) through a communication cable 2 . Different commands are transmitted and received between the fault diagnosis device 1 and the ECU 3 through the communication cable 2 . ECU3 has a diagnostic function. This diagnostic function refers to a self-diagnostic function. More specifically, the ECU 3 monitors input signals from sensors, actuators, and switches, and when some abnormality occurs in the input signal, the ECU 3 c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60S5/00B60R16/02G01M17/00G07C5/00G07C5/08
CPCG07C5/008G07C5/085G01M17/007G01R31/006B60R16/02
Inventor 川内浩北岛晶久
Owner MITSUBISHI FUSO TRUCK AND BUS CORPORATION