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Look! Fault Diagnosis of Automotive Dashboard

  • Author:Angelia
  • Source:www.diecastingpartsupplier.com
  • Release on :2017-06-27
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Folding method

When the car electrical instrument readings abnormal, through the analysis, it is inferred that the sensor may be inside or between the sensor and indicating the existence of wire between the instrument failure, often using the disconnection method to check. That is, by removing the wires on the terminal, to determine the cause and location of the fault. Take the electromagnetic fuel gauge as an example. When the sensor inside the ground or float damage, and the sensor and the fuel gauge wire between the conductor, no matter how much fuel tank, turn on the ignition switch, the fuel gauge pointer always point to "0" , This time can be used to check the broken line method. First, remove the sensor on the wire, if the fuel gauge pointer to "I" at this time, then the sensor inside the ground or float damage; if the pointer is still pointing to "0", you should remove the fuel gauge on the sensor wiring Column wire, if the instrument pointer to "I" move, for the fuel gauge to the sensor wire between the cable; if the pointer still does not move, it may be damaged inside the fuel gauge or its power line. cheap mold maker china

Folding method

When the car electrical instrument readings abnormal, through the analysis, inferred that the sensor may be bad or damaged, and the sensor and the indicator instrument between the wires there is an open circuit failure, often used to check the iron method. Through the wire will be related to the terminal grounding, can determine the cause and location of the fault. After the ignition switch, for the electromagnetic fuel gauge fuel tank regardless of how much oil, fuel gauge pointer are pointing to "I"; for bimetal fuel gauge, fuel gauge pointer are pointing to "0", the above situation shows the corresponding instrument The sensor may be badly grounded, damaged, or the sensor and the indicator instrument between the wires there is an open circuit fault, this time, you can use the grounding method to check. First, the sensor and the wire connected to the terminal grounding, if the pointer rotation, indicating that the sensor is damaged or bad ground; if the pointer does not turn, the wire can be used to indicate the instrument connected to the sensor line pin, if the pointer rotation, compared with There is an open circuit fault between the sensor and the indicating instrument. If the pointer does not rotate, it indicates that the instrument is damaged or its power cord is broken.

Folding short connection

In other electrical and electronic work are normal, only with the regulator connected to the instrument (such as fuel table, electromagnetic water temperature table, etc.) does not work, you can use the short circuit to check. With the wire to the regulator input and output shorted, then connected with the regulator pointer pointer if the deflection immediately, there is a fault inside the regulator.


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