Suzuki Grand Vitara Service Manual page 284

1C-15 Engine Electrical Devices:
2) Check resistance of intake manifold tuning vacuum
solenoid valve.
If resistance is as specified, proceed to next
operation check. If not, replace intake manifold
tuning vacuum solenoid valve.
Resistance of intake manifold tuning vacuum
solenoid valve
Between two terminals: 33 – 39 Ω at 20 °C (68 °F)
3) Disconnect vacuum hoses (1 and 2) from intake
manifold tuning valve and vacuum tank.
4) With connector disconnected, apply vacuum (–53
kPa (– 7.69 psi) to –67 kPa (–9.72 psi)) to hose (2).
Vacuum is maintained.
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5) With connector disconnected, apply vacuum to hose
(1). Air goes into nozzle (2).
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6) Connect 12 V-battery to intake manifold tuning
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 intake
manifold tuning vacuum solenoid valve.
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7) Connect vacuum hoses to intake manifold tuning
valve and vacuum tank.
8) Connect intake manifold tuning vacuum solenoid
valve connector securely.
Vacuum Tank
1) Check outside of vacuum tank for damage visually.
2) Disconnect vacuum hoses from intake manifold and
intake manifold tuning vacuum solenoid valve.
3) Check vacuum passage of vacuum tank for clog and
leakage as follows by using vacuum pump.
a) When applying vacuum (– 53 kPa (– 7.69 psi) to
– 67 kPa (–9.72 psi)) to hose (1), vacuum is
maintained (there is no leakage): [A]
b) When applying vacuum to hose (2), vacuum is
not maintained: [B]
If check result is not described, replace vacuum
tank assembly.
[A]
[B]
4) Connect vacuum hoses to intake manifold and intake
manifold tuning vacuum solenoid valve.
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