
2. Check the resistance of the solenoid coils.

3. Apply power and ensure that air enters port E and exits port F. When power is removed, no air should pass through port F.
(The original source is located on the website: TOYOTAMAN.ru)

4. Replace the unit if the results of one of the tests are negative, to do this, disconnect the hoses (A), press the latch (B) and unscrew the bolt (C).
