Operation Inspection

WARNING: This page is about a different car, the 2005 Mazda MX-5 Miata. However, it is still accessible from the selected car via links, so may be relevant.

Disconnect the negative battery cable.
Disconnect the vacuum hose from the VTCS vacuum switch.
Connect a vacuum pump to the VTCS vacuum switch.

Apply vacuum slowly and verify that continuity between the VTCS vacuum switch terminals changes as indicated in the table using an ohmmeter.

If not as specified, replace the VTCS vacuum switch.
If VTCS vacuum switch is okay but the PID value is out of specification, perform the CIRCUIT OPEN/SHORT INSPECTION .

Fig 1: VTCS Vacuum Switch PID Value Specification

Courtesy of MAZDA MOTORS CORP.

Connecting Vacuum Pump To VTCS Vacuum Switch

Vacuum (kPa {mmHg, inHg})	Continuity
-36.0- -27.8 {-270- -208,-10.6- -8.2}	From no continuity to continuity
-33.9- -27.3 {-254- -204, -10.0- -8.0}	From continuity to no continuity