| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a method for imparting an identification code of an on- vehicle ECU enabling the simplification of working processes and cost reduction. SOLUTION: An engine ECU 10 and a security ECU 20 are interconnected in such a manner as to enable serial communications therebetween. A vehicle ID (vehicle identification code) and an ECU-ID (ECU identification code) are stored in the flash ROM 12 of the engine ECU 10, and the flash ROM 22 of the security ECU 20 also stores the ECU-ID as does the flash ROM of the engine ECU 10. If there is an ID write request from an external tool 40 during assembly of the ECU in the engine or replacement of the ECU, the vehicle ID transmitted from the external tool 40 is written in the flash ROM 12 in the engine ECU 10. Subsequently, the vehicle ID is processed to originate an ECU-ID, which is then written in the flash ROM 12.</p> |
