| 摘要 |
The present invention relates to a method for diagnosing disconnection of an oxygen sensor, which comprises the steps of: enabling a control unit to measure a voltage distributed to the oxygen sensor through a voltage divider; measuring a voltage of a reference cell of the oxygen sensor; determining whether the voltage distributed to the oxygen sensor and the voltage of the reference cell are within a reference range from each of preset reference values; and determining that a ground wire of the oxygen sensor is disconnected when the voltage distributed to the oxygen sensor or the voltage of the reference cell is out of each reference range. |
