Vacuum solenoid valve

With ignition switch OFF, disconnect connector from vacuum solenoid valve.
Check resistance of vacuum solenoid valve.
If resistance is as specified, proceed to next operation check. If not, replace vacuum solenoid valve.

Resistance of vacuum solenoid valve

Between two terminals: 33 - 39 ohm at 20°C (68°F)

Fig 1: Checking Resistance Of Vacuum Solenoid Valve
Courtesy of SUZUKI OF AMERICA CORP.
Disconnect vacuum hoses (1 and 2) from intake air valve and vacuum tank.
With connector disconnected, apply vacuum to hose (2). Vacuum is maintained.

Fig 2: Applying Vacuum To Vacuum Hose (2)
Courtesy of SUZUKI OF AMERICA CORP.
With connector disconnected, apply vacuum to hose (1). Air goes into nozzle (2).

Fig 3: Applying Vacuum To Vacuum Hose (1)
Courtesy of SUZUKI OF AMERICA CORP.
Connect 12V battery to vacuum solenoid valve terminals. In this state, apply vacuum to hose (2). Air goes into hose (1).
If check result is not as described, replace vacuum solenoid valve.

Fig 4: Testing Vacuum Solenoid Valve
Courtesy of SUZUKI OF AMERICA CORP.
Connect vacuum hoses to intake air valve and vacuum tank.
Connect vacuum solenoid valve connector securely.