Sentra Hatchback Coupe L4-1597cc 1.6L SOHC (E16i) (1987)
Air Induction Valve: Description and Operation
Fig. 116 Air Injecton Valve (AIV) Operation
The air injection valve system delivers secondary air to the exhaust manifold, utilizing a vacuum caused by exhaust pulsation in the exhaust manifold.
Specific operating conditions are outlined in Fig. 116