EVAP Canister

Check EVAP canister as follows:

1. Block port B  .
2. Blow air into port A  and check that it flows freely out of port C  .
3. Release blocked port B  .
4. Apply vacuum pressure to port B  and check that vacuum pressure exists at the ports A  and C  .
5. Block port A  and B  .
6. Apply pressure to port C  and check that there is no leakage.

Fig 1: Identifying EVAP Canister Ports

Courtesy of NISSAN MOTOR CO., U.S.A.