1. the multimeter to detect the electronic function (resistance value) of the fault part with the liquid level display not allowed.

Detection steps:

1. Check whether the appearance of the faulty part of the sensor is obviously damaged, whether the connector is damaged and whether the float can slide normally.

2. Connect the multimeter and sensor pins, and adjust the gear to "Ω" ohm,

3. Test the electronic function of the faulty part according to the resistance table of the sensor number (Note: the sliding float needs to be slowly and uniformly, and the corresponding distance in the resistance table corresponds to the corresponding resistance value).

2. hand-held detector to detect the electronic function (resistance value) of the fault part with inaccurate liquid level display.

Detection steps:

Step 1: Connect the sensor connector to the corresponding test harness of the detector, and connect with the detector to ensure that the connector is in place and does not loosen.

Step 2: Tap the "power button" to boot

Step three: function select "automatic judgment" and then press the confirmation piece

Step 4: According to the corresponding resistance range displayed on the liquid level sensor selection screen, use the up and down keys to select, press the confirmation key after selection, and the tester starts testing.