Note: Drain the brake fluid completely from the master cylinder reservoir. The electrical circuit should be closed when the float is in the lower position.
Fill the reservoir with brake fluid up to the "MAX" mark A. In the upper position of the float, the electrical circuit should be open.
If the ABS or VSA indicator and the brake system indicator come on at the same time, check the ABS or VSA first: ABS, VSA.
If the parking brake/brake fluid level sensors are OK and the brake system indicator does not work, check the ABS or VSA: ABS, VSA.