A) disconnect the sensor connector. Connect «+» voltmeter to the connector terminal, «-» voltmeter to ground.
b) turn on the ignition: the voltmeter needle should fluctuate around the 4.5 V mark. If not, remove and check the pointer.
2. Checking the resistance of the pointer. Measure the resistance between terminals TU and E.
- Resistance: about 25 ohm
If the resistance is not as specified, replace the pointer.
3. Checking the resistance of the sensor.
A) Check the change in sensor resistance when moving its float.
b) Measure the resistance between terminals 1 and 2 of the sensor.
If the resistance is not as specified, replace the pointer.