Fuel Tank Vacuum Relief Valve (Built Into Fuel Filler Cap)

Wipe clean valve housing.

Fig 1: Sectional View Of Fuel Tank Vacuum Relief Valve
Courtesy of SUZUKI OF AMERICA CORP.
Check valve opening pressure and vacuum.

Fig 2: Checking Valve Opening Pressure And Vacuum
Courtesy of SUZUKI OF AMERICA CORP.

Pressure: 15.3 - 20.0 kPa (0.156 - 0.204 kg/cm ² , 2.22 - 2.90 psi)

Vacuum: -6.0 to -3.3 kPa (-0.061 to -0.034 kg/cm ² , -0.87 to -0.48 psi)
If out of specification, replace fuel filler cap as an assembly.
CAUTION: Use only a genuine fuel filler cap as a replacement. If an incorrect fuel filler cap is used, the MIL may come on.