Air Cleaner Cap Sub-Assembly (ES300)
- Cover port "C" with finger and check that air flows from port "B" to port "A". See Fig 1.
- Cover port "C" with finger and check that air does not flow from port "A" to port "B".
- Cover ports "A" and "C" with fingers, apply 18 in. Hg (60 kPa) of vacuum to port "B" and check that there is not change of vacuum after one minute.
- Repair or replace as necessary.