Note: It is more convenient to check the sensor with an assistant.
Examination
1. Prepare the car for work (see "Preparing the car for maintenance and repair").
2. Turn on the ignition.
3. Pressing from above, we sink the float rod of the sensor. At the same time, the control lamp for insufficient brake fluid level should light up on the instrument panel.
Recommendation: If the indicator lamp does not light, then the terminals in the block itself may be oxidized, the sensor may be faulty, or the brake fluid low level indicator lamp may be faulty. To make sure the indicator lamp is working properly, simply short-circuit the terminals of the connecting block. The indicator lamp should light. A faulty indicator lamp must be replaced (see "Instrument cluster - bulb replacement"). If the indicator lamp lights up when the connector terminals are shorted, the sensor is faulty and must be replaced.
Removal
1. Turn off the ignition.
2. Disconnect the wiring harness connector from the sensor.
3. Unscrew the lid of the main brake cylinder reservoir. Remove the sensor float from the reservoir and remove the sensor.
We replace the faulty sensor as an assembly.
Installation
We install the sensor in the reverse order.