Air-tightness Inspection

WARNING: This page is about a different car, the 2018 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.

Connect a suitable tool at each end of the vacuum hose to inspect the check valve operation.

Vacuum applied at booster end	: Refer to Check Valve - Vacuum Hose With Check Valve .
Vacuum applied at intake manifold end	: Refer to Check Valve - Vacuum Hose With Check Valve .

Replace the vacuum hose with check valve if out of specification.