Caution: Do not disconnect the check valve from the vacuum hose.
2. Check the operation of the check valve using a compressor.
| Compressor connection | Evaluation criteria |
| Direction from amplifier to engine | The air passes through |
| Reverse direction | The air doesn't pass through |
Caution: If the check valve is faulty, replace it together with the vacuum hose.
(The article was taken from the website: mitsubishiman.ru)
