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fuel level inaccurate ford explorer gauge
B2628,( Fuel level inaccurate ford explorer gauge) which means "the No. 2 circuit of the fuel sender is shorted to the ground" and cannot be cleared. Disconnect the fuel pump wire connector C732, measure the voltage between its terminal 2 and terminal 4, it is 12 V, normal; then measure the connection of the two wires between the fuel position sensor and the instrument cluster, and there is no open circuit or short circuit. Remove the fuel pump, and when the oil float is moved to the lowest position, the measured resistance of the fuel position sensor is about 200Ω; when the oil float is moved to the highest position, the measured resistance of the fuel position sensor is about 10Ω, which is the same as that of a normal car. Compared with the fuel position sensor, the resistance is normal, and the resistance changes continuously during the process of moving the oil float. Diagnosis so far shows that the fuel position sensor and its circuits are normal, and it is suspected that the internal program of the combination instrument is wrong or the hardware is damaged. Use the combination meter data of the same model to reprogram the combination meter of the car and test drive, and the fault persists. After swapping and installing the combination meter with the test drive car of the same model, the car returned to normal, but the fault was transferred to the test drive car, so it was determined that the combination meter was damaged.
1. The inaccurate fuel gauge may be due to a fault in the display system or measurement system of the fuel gauge. If the fuel gauge is inaccurate, it is recommended to repair it as soon as possible, because the inaccurate fuel gauge may cause the vehicle to run out of fuel, and the vehicle breaks down. On the road, it will be very troublesome; 2. First, let's understand the structure and working principle of the gasoline gauge: the fuel gauge has two systems, one is the display system and the other is the measurement system. The display system is to display how much oil is left in the fuel tank. The system is to measure how much oil is left in the fuel tank; to put it simply, the signal from the measurement system is sent to the display system, and the display system is displayed through the fuel gauge. The measurement system is composed of a float, a metal rod and a variable resistor in the fuel tank. The position of the float changes on the oil surface in the fuel tank, and the oil volume will be measured through the position change of the metal rod and then through the position change of the variable resistor. ; 3. We have already understood the principle of the fuel gauge, and the common fault points are: it may be that the float in the gasoline pump has failed and the fuel gauge is inaccurate. So it is recommended to check this part, if it is damaged, it needs to be replaced. A reminder, some cars can be replaced separately, but some cars cannot be replaced separately. If it cannot be replaced separately, the gasoline pump assembly needs to be replaced.
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