| 摘要 |
PROBLEM TO BE SOLVED: To keep the anti-theft function by adding or subtracting the correction value to the upper numerical data and the lower numerical data, when the upper numerical data and the lower numerical data are respectively agreed with the ECU addresses of the other ECUs excluding ECU for engine and ECU for immobilizer. SOLUTION: The tentative upper numerical data of the upper 1 bite and the tentative lower numerical data of the lower 1 bite are respectively generated by a random number generator 23a, and these are properly corrected to ascertain the upper numerical data and the lower numerical data of the rolling code of 2-bite, as the numerical data different form the ECU address of the other ECU excluding ECU for immobilize 20 and ECU for engine 30. Accordingly the collision of the data for anti-theft, and the data for diagnosing failure, is not generated, and the communication between the ECU for immobilizer 20 and the ECU for engine 30 can be properly performed. |
