PROCEDURE
INSPECT BRAKE VACUUM CHECK VALVE ASSEMBLY
| *a | Ventilation |
| *b | No Ventilation |
| *c | Engine Side |
| *d | Brake Booster Assembly Side |
Check that there is ventilation from the booster side to the engine side, and no ventilation from the engine side to the booster side of the brake vacuum check valve assembly.
If the results are not as specified, replace the brake vacuum check valve assembly.