Sentra L4-1597cc 1.6L DOHC MFI (GA16DE) (1991)
Fig. 46 Solenoid Test
EGR SOLENOID FUNCTION TEST
Apply voltage to the solenoid terminals and check air passages for continuity as shown above. If continuity does not exist replace solenoid.
CAUTION:Reversing polarity will damage the solenoid.