Brake control

Inspection

~1min read

1. INSPECT BRAKE VACUUM CHECK VALVE ASSEMBLY

INSPECT BRAKE VACUUM CHECK VALVE ASSEMBLY

(a) Check the vacuum check valve.

(1) Slide the clip and disconnect the vacuum hose.

(2) Remove the vacuum check valve.

(3) Check that there is ventilation from the booster to the engine, and no ventilation from the engine to the booster.

(4) If any fault is found, replace the vacuum check valve.

Test yourself

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