| 摘要 |
In an engine start control device useful as a vehicle robbery prevention device, a reference code is stored in EEPROM (20a) of an immobilizer ECU (20), and a processor (20b) compares a key code transmitted from a transponder (12) of a key (10) with the reference code. Subsequently, in case of an inconsistency, a signal L is transmitted to an engine ECU (24) to stop an engine (30), but when the collation is not completed or when another communication is not performed, the immobilizer ECU (20) transmits to the engine ECU (24) a start code encoded in an encoder (20c). The engine ECU (24) decodes the start code by a decoder (24b) to recognize it. Subsequently, if the start code cannot be recognized, the engine (30) is stopped. Thereby, in a case where a communication line connecting the immobilizer ECU (20) and the engine ECU (24) is disconnected, the engine (30) can be stopped.
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