A thermoelectric conversion module includes a pair of heat transfer plates, p-type semiconductor blocks and n-type semiconductor blocks arranged between the heat transfer plates, and terminal electrodes formed respectively on inner surfaces of the heat transfer plates and connecting the semiconductor blocks in series. The composition comprises a plasticizer and a base polymer, where the base polymer comprises a carboxylic acid, where the composition is soluble in an alkaline solution. The second latch is inserted in the feedback path of the keeper circuit of the first latch and is cross-coupled with the gates of the keeper circuit of the first latch. In a stage after Sch has reached the predetermined value, the possibility of the vehicle traveling in the curve is judged to be high, and the reliability of the curve information Rc, Pc is judged to be high.