Note: Some vehicles may be equipped with a low oil level sensor. If the oil level in the engine crankcase has dropped to the "MIN" mark or below, then after turning on the ignition, the corresponding indicator lamp in the indicator unit of the on-board monitoring system should light. Otherwise, the indicator unit is faulty (see "On-board control system indicator unit - removal and installation"), low oil level sensor, or their circuit is faulty. The terminal in the sensor wire block may have oxidized.
To complete the work you will need:
- inspection ditch or overpass;
- multimeter.
Sequence of execution
1. Prepare the car for work (see "Preparing the car for maintenance and repair").
2. Disconnect the wire tip from the oil level sensor. With the ignition on, use a voltmeter to measure the voltage between the terminal of the connector block and the ground. The voltage should be about 12 V. If voltage does not reach the block, then there may be poor contact or a broken wire in the sensor circuit, or the indicator unit is faulty.
3. With a socket wrench by 10 mm unscrew the sensor mounting bolt.
4. Remove the sensor from the engine cylinder block hole.
Examination
1. Connect the multimeter (in ohmmeter mode) to the body and the sensor output.
2. By moving the float from one extreme position to another, we measure the electrical resistance of the sensor. In the extreme upper position, the resistance should be infinitely large...
...and in others - close to zero.
Recommendation: The oxidized terminal in the block should be cleaned with an awl or a thin file. Damaged sections of the wire must be restored. The faulty sensor and indicator unit are replaced (see "On-board control system indicator unit - removal and installation").
Installation
We install the sensor in the reverse order of removal.