Bus isolation/diagnostic tool

Details Bus isolation/diagnostic tool Bus isolation/diagnostic tool

1997-10-10

2000-03-14

Ballato, Josie

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

In vehicle wiring

324402, G01R 3100

Patent

active

060377798

ABSTRACT:
A communication bus test tool for motor vehicles having a plurality of electronic modules connected to a common communication bus in a body controller by a wiring harness. The wiring harness has an individual bus signal wire for the bus signal for each electronic module and at least one connector for connecting to a corresponding connector of the body controller. The wiring harness's connector has an individual terminal connected to each individual bus signal wire and the body controller's connector has terminals corresponding to the wiring harness' connector terminals. The bus test tool has a first connector for connecting to the wiring harness's connector with individual terminals corresponding to the individual terminals in the wiring harness connector including individual bus terminals corresponding to the terminals in the wiring harness connector connected to the bus signal wires. The bus test tool has a second connector for connecting to the body controller's connector with individual terminals corresponding to the individual terminals in the bus test tool's first connector including individual bus terminals corresponding to the individual bus terminals in the first connector. Circuits are coupled between the bus test tool's first and second connectors for selectively connecting and disconnecting the bus terminals in the first connector to the corresponding bus terminals connections in the second connector to permit bus signals from each electronic module to be selectively isolated from the common bus in the body controller. The bus test tool also includes circuits for detecting whether the bus signal from an electronic module is above a specified operating range, within the range, or below the range, and indicating the results of the detection

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