Motor vehicle diagnostic equipment - uses signal coupler already installed in vehicle with at least measuring and/or stimuli lead connected

摘要

At least one measured value registering unit (22, 25) connectable to a signal source (13) to be tested and/or at least one stimuli unit (24, 26) connectable to a signal negative source (14) to be stimulated are assigned to the vehicle mounted coupler (10). The measured value registering unit is pref. in the form of a variable multi-measuring appts. The measuring lead (27) for the latter and/or the stimuli lead (29) for the stimuli unit can be disconnected. The connection between the coupler and the diagnostic system is established via at least are coupling lead (31). Gabramis signal separation, pref. by means of transformers or opto-couplers, is provided. ADVANTAGE - Increased range of application of coupler without significantly more cabling.