Pic. 1.139. Scheme for checking the free play of the brake pedal
Stop the engine and press the brake pedal several times until there is no vacuum left in the vacuum booster (pic. 1.139).
Press the pedal until you feel a noticeable resistance. Measure the distance as shown.
Pedal free play: 1–6 mm.
If not, check the brake light switch clearance. If the gap is in order, then look for a malfunction in the brake system.
Brake light switch clearance: 0.5–2.5 mm.