Apparatus and method for testing auto electronics systems

G - Physics – 01 – R

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G01R 31/00 (2006.01) G07C 5/08 (2006.01)

Patent

CA 1282830

APPARATUS AND METHOD FOR TESTING AUTO ELECTRONICS SYSTEMS ABSTRACT OF THE DISCLOSURE An interactive system and method for testing vehicle electronics systems is disclosed in which varius vehicle subsystems are exercised under the control of the tester unit (2) while the performance of associated subsystems are moni- tored to detect and isolate malfunctions. The tester includes interchangeable program cartridges (12) that can be easily inserted to adapt the unit for a variety of different vehicles and test procedures, and also optional interchangeable input- /output cartridges (18) for test procedures in which addition- al access to or from the tester or peripheral devices is necessary. The test unit accesses the vehicle's electronics data bus (58) by means of an assembly line diagnostic link (72), the access being accomplished via a multiplexer (94) that makes it possible to locate faults on the data bus it- self. The tester greatly reduces the time and effort neces- sary to analyze malfunctions in the field, and is considerably more comprehensive than prior test equipment.

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