Patent ID: 7413445

Claim:
An electronic control unit comprising: an electronic circuit substrate; a liquid tight casing that accommodates the electronic circuit substrate therein, wherein the liquid tight casing includes a casing wall and a lid mounted to an opening of the casing in a liquid tight manner; a connector terminal that extends through the wall of the casing in an extending direction, and is connected to the electronic circuit substrate for electrically connecting the electronic circuit substrate to an external wire; a retainer portion freely extending from an inner side of the casing wall through which the connector terminal extends, wherein the retainer portion comprises a plurality of retainer portion walls extending parallel to the extending direction, and a retainer portion wall extending transverse to the extending direction, to form a cavity having an opening facing the opening of the liquid tight casing, wherein the connector terminal extends through the cavity; and a sealing agent in the cavity for sealing a space between the connector terminal and the casing wall in a liquid-tight manner.