Checking the boost pressure control solenoid valve
1. Hose routing: first check that all hoses are correctly connected to the valve.
2. Disconnect the valve connector.
3. Connect an accurate ohmmeter to both pins of the valve connector.
4. The ohmmeter should show 25-35 ohms, otherwise the boost pressure control solenoid valve is defective.
5. Apply voltage: connect a voltmeter to pin 1 of the disconnected connector and to «mass».
6. Operate the starter: the voltmeter should show the voltage of the battery, otherwise the conductivity in the wires is broken or the fuel pump relay is faulty.
The arrow indicates the crankcase ventilation pressure relief valve.
Under the mentioned pressure limiting valve, you see the following parts: 1 - vacuum box of the boost pressure control valve; 2 - draft cut-off valve; 3 – solenoid valve for boost pressure limitation.
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