| 摘要 |
PURPOSE:To prevent an unintended advance of a car by inhibiting an automatic speed changer from being transferred from a parking position to other speed change positions regardless of the operation of a select switch selecting speed change positions of the automatic speed changer while an ignition switch is opened. CONSTITUTION:When a driver pushes the P shift switch of a select switch 1 and opens an ignition switch 65 to depart from a car, a motor 7 is operated by a switching signal from a logical unit 5 via a drive circuit 10, and the manual valve of an automatic speed changer is transferred to P position. In addition, an LED element 59 indicating the P position in a speed change position display circuit 33 is lighted, and a transfer switch 72 is concurrently transferred to the contact point 72a side. Under this condition, even if the select switch is unintendedly operated, the logical unit 5 is kept in an inoperative condition, because an H signal is inputted via an inverter 71 to input terminals on one side of OR circuits 66-70 of an input control circuit 6. |
