| 摘要 |
<p>In a vehicle diagnostic method and an external diagnostic device (14) sensor detection values acquired by communicating with an ECU (20) are measured to determine whether the values are in a normal range while a vehicle (12) is idling. After an engine (26) is started an operation to measure soundness is prohibited at least until the sensor detection values including the engine rotational frequency (Ne) reach a threshold value region indicating the completion of the warm up operation. The fluctuation state of the sensor detection values is displayed on an operation screen (200) until the sensor detection values reach the threshold value region.</p> |
