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1 解码器只能监视电控系统电路如果故障不属于电控系统的电路故障,解码器不能检测。例如,电磁阀的发卡、发动机点火系统的高压电路故障等不属于电控系统故障,因而不能检测。2 使用解码器一般只能监视信号的范围,不能监视传感器特性的变化如果只是信号的特性发生了变化,并不能产生故障代码,例如,自动变速器油温传感器的阻值变化有一
1 Decoder can only monitor the electronic control system circuit If the fault does not belong to the electrical control system circuit failure, the decoder can not detect. For example, the issuance of solenoid valves, high-voltage engine ignition system fault does not belong to the electronic control system fault, which can not be detected. 2 Using a decoder Generally, you can only monitor the range of the signal. You can not monitor changes in the characteristics of the sensor. If only the characteristics of the signal have changed, no fault code will be generated. For example, the automatic transmission oil temperature sensor has a change in resistance of