yes, there is a seperate battery, but dont know its exact location (maybe its under the rear seat.
there can be many reasons for this problem. i myself faced this blinking issue in my Mitsubishi EK, but that was due to battery discharged (due to car parked at home for a few days etc.).
- one more option is to reset the Car ECU, but unplugging the terminal of the main battery(under the hood) and then connect again after a few minutes.