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fuel level sensor a circuit
If the fuel level sensor a has no output / communication, the power supply may be open a circuit or the voltage may be too low; Sensor failure; For the three reasons of incorrect wiring, it is necessary to check whether the wiring is correct, whether the power supply voltage is greater than 10V when detecting the load, and whether the power supply current is 3~10ma. Carry out wiring, or switch the blue and yellow lines. If the above checks are normal or the current exceeds the normal range, it is a sensor fault.
If the output value does not change , it will show that the power supply voltage is abnormal . The solution is to check whether the power supply voltage is normal when the load is applied - power on the sensor again - whether there is serious interference around - check whether the upper and lower holes of the sensor are blocked - if not , it is a fuel level sensor a circuit fault .
If the output value error is large, the power supply voltage will be abnormal. It is necessary to check whether the power supply voltage is normal when the load is loaded - whether there is serious interference around - whether the upper and lower holes of the sensor are blocked - if not , it is a sensor fault .
If the output value jumps up and down, the oil level will jump. The solution is to check whether the oil level is jumping - whether the power supply voltage is normal - whether there is interference around - if not , it is a sensor fault .
Check the power supply, iron striking and signal . The sensor is damaged. The fuel level warning lamp in the instrument of insufficient fuel tank is on because the fuel pump motor is not sufficiently cooled and lubricated due to the low liquid level , which will cause the motor to overheat or even not work. If this happens for a long time , the damage of the gasoline pump will be accelerated .
The gasoline quality is too poor . There are impurities or foreign matters in the gasoline . If the gasoline pump is too dirty , these impurities will enter the internal bearings of the gasoline pump, which will accelerate the wear of the bearings and cause damage to the gasoline pump .
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