| 摘要 |
PURPOSE: To provide a low-cost power-supply monitor apparatus for a vehicle, which dispenses with a monitor circuit for a battery power supply, which has been conventionally used, but uses only a signal monitoring circuit utilizing an ignition power supply, and can simplify the constitutions of a power supply circuit and a watchdog circuit. CONSTITUTION: This is the signal monitor apparatus for a vehicle having a transmission controller 10 connected to a battery +BB through an ignition switch IG. A memory element 11 to store a signal 20 outputted from a battery power supply under the on-state of an ignition switch IG is provided inside the transmission controller 10. |
