Hyundai Accent Quiz
Brake System

Vacuum Brake Booster Check

In this manual: Brake System
Owner's Manual — 155SOHC Engines — 75DOHC Engines — 49Lubrication System — 14Cooling System — 23Emission Control — 3PCV Valve — 5Fuel system — 44Ignition System — 12Clutch — 17Manual transmission — 14Automatic transmission — 24Axle Shafts and Drive Shafts — 17Suspension — 31Steering — 45Brake System — 39Body — 23Air Conditioning System — 32Electrical Equipment — 54Appendix — 9Wiring Diagrams — 3
~1min read

PROCEDURE

1. Start the engine and stop it after 1–2 minutes. Depress the brake pedal with normal force. If the first stroke of the pedal is long and the second stroke is shorter than the first, the vacuum brake booster is operating normally.
2. With the engine off, depress the brake pedal several times. Start the engine. If the brake pedal moves down immediately after the engine starts, the vacuum brake booster is operating normally.
3. Start the engine.
Depress the brake pedal with normal force. Stop the engine. Slowly depress the brake pedal and hold it for 30 seconds. If the pedal height does not change, the vacuum brake booster is operating normally.

В противном случае, проверьте односторонний вакуумный клапан или вакуумный шланг

If not, inspect the check valve or vacuum hose for damage and check that their connections are secure.

Test yourself

A quick Hyundai Accent quiz: every answer comes with an explanation and a link to the manual page.