| 摘要 |
To provide a vehicle electronic control unit including a first microcomputer (2, 3) and a second microcomputer (3, 2) capable of transmitting and receiving signals to and from the first microcomputer. One of the first microcomputer and the second microcomputer outputs a PWM signal to the other microcomputer (3, 2). The other microcomputer detects an on-time of the PWM signal, performs a self diagnosis according to the detected on-time, and outputs a self diagnosis result to the one microcomputer. The one microcomputer diagnoses the other microcomputer based on the self diagnosis result. |
