Patent ID: 6140821
Filing Date: 2000-10-31
Classification: B60R,G01R

Abstract:
A method for the recognition of insulation defects in a safety circuit for triggering an ignition pellet of an airbag system in a motor vehicle, the circuit adapted for connection to a low-ohmic terminal device having an off-load voltage magnitude .vertline.U.sub.n0 .vertline., the method comprising the steps of:a) applying a diagnostic voltage to the circuit from a current limited terminal device, said current limited device having an off-load voltage magnitude .vertline.U.sub.h0 .vertline. greater than or largely equal to .vertline.U.sub.n) .vertline.;b) measuring said diagnostic voltage in the circuit to decide on a presence of an insulation defect should said diagnostic voltage have a magnitude less than a magnitude of a prescribed limiting value;c) issuing an error message if said insulation defect is present in step b) and preventing connection of the low-ohmic device to the circuit;d) connecting the low-ohmic device to the circuit if no insulation defect is present in step b).