D21 Hardbody XE King Cab 4WD L4-2389cc 2.4L SOHC MFI (KA24E) (1997)
Swirl Control Vacuum Check Switch: Testing and Inspection
One-way Valve
Check one-way valve air passage continuity.
Condition / Air passage continuity
Blow air from side B to A / Yes
Blow air from side A to B / No
If NG, replace one-way valve.