| 摘要 |
<p>A vehicle trouble diagnosis system adapted to actuate a lamp (5) to give a trouble diagnosis indication in response to a CPU runaway detection signal (WDA) outputted from a microcomputer (2) for watching whether or not a control microcomputer (1) is running away, and adapted to intentionally output the CPU runaway detection signal (WDA) before execution of control by the microcomputer (1) for trouble diagnosis is started, wherein a transistor (4A) is kept turned-on until lighting is started for checking the lamp (5) after an ignition switch has been switched from off to on, so that the lamp (5) is in a continuously lighted state, thus preventing the lamp (5) from flickering during checkup.</p> |
