Method for establishing link between vehicle-mounted electronic control unit and testing device
US4831868A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 17, 1988 |
| Grant date | May 23, 1989 |
| Priority date | — |
| Expiry date | Mar 17, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T2270/406
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A vehicle-mounted electronic control unit such as an anti-lock brake control unit is connected to a testing device through two serial transmission lines for testing. Upon startup of the control unit, signals are exchanged therebetween. Only if the signal exchange is completed in a predetermined period of time, the control unit enters into a special operation mode for testing. Otherwise, it is controlled in an ordinary mode. In this test mode, the data in the control unit such as a wheel speed are sent to the testing device to be inputted in its test programs. The testing device then gives to the control unit various command signals produced according to its programs. The control unit then sends test signals in response to the command signals to actuators. Thus, when the control unit is in the test mode, the testing device can control the actuators by transmitting command signals to the control unit and thus can test the performance of not only the control unit but also the actuators from various angles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.