Daytime running light function (canada)

When power sw is at ig on position and the vehicle is ready to drive (ready lamp on the display in combination meter is on), releasing parking brake makes signal go into terminal pkb of body ecu. In this condition, when light control sw is at off/tail/auto position (headlight is not lit), body ecu sends daytime operation request from terminal drl/dim to daytime running light relay. As a result, daytime running light relay duty-operates headlights (dimmer than regular lighting)