V40 L4-1.9L Turbo VIN 29 B4204T3 (2002)
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Remove the quick coupling of the vacuum line at the vacuum pump.
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Fit gauge 999 5230 PRESSURE METER See: Tools and Equipment/999 5230 Pressure Meter on the pump.
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Start the engine and read the gauge.
The value should lie between 80-90 kPa negative pressure.
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Turn off the engine
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The vacuum should not sink too quickly (If the pump has difficulty reaching 80-90 kPa negative pressure, replace it).
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Remove the pressure gauge
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Fit the vacuum line's quick coupling on the pump.
Checking the non-return valves in the vacuum control valve.
