Sentra (Exc. M.P.G.), 210 & 310

Disconnect vacuum hose and vacuum switch connector. Using vacuum pump, apply 23 in Hg vacuum to vacuum hose. Check that there is continuity between C and NC and no continuity between C and NO. See Fig 1.

Fig 1: Vacuum Switch Test Connections
Courtesy of NISSAN NORTH AMERICA, INC.

Sentra (Exc. M.P.G.), 210 and 310 only.
Disconnect vacuum pump. Check that there is continuity between C and NO and no continuity between C and NC. Reconnect hose and connector.