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1. (WO2018042858) INSPECTION METHOD FOR CONTROL CIRCUIT

Pub. No.:    WO/2018/042858    International Application No.:    PCT/JP2017/023910
Publication Date: Fri Mar 09 00:59:59 CET 2018 International Filing Date: Fri Jun 30 01:59:59 CEST 2017
IPC: G06F 12/16
G01R 31/28
Applicants: DENSO CORPORATION
株式会社デンソー
Inventors: MIZUTANI Hiroaki
水谷 広昭
Title: INSPECTION METHOD FOR CONTROL CIRCUIT
Abstract:
This inspection method is for a control circuit in which a memory unit (110) and a control unit (140) connected to the memory unit via a signal line (161) are provided on a substrate (101). The method comprises: providing, on the substrate, a foot pattern portion (150) to which an inspection device (181, 182) can be connected and a connection line (171) connecting the foot pattern portion to an intermediate portion (161a) of the signal line, prior to shipment; connecting the inspection device to the foot pattern portion after recovery of the control circuit based on malfunction in the market; performing first inspection of establishing a connected state of a part, of the signal line, between the memory unit and the intermediate portion and establishing a disconnected state of a part, of the signal line, between the control unit and the intermediate portion; and performing second inspection of establishing a connected state of the part, of the signal line, between the control unit and the intermediate unit and establishing a disconnected state of the part, of the signal line, between the memory unit and the intermediate portion.