Combustion circulation boost pressure control valve (403)
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Combustion circulation boost pressure control valve (403)
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Combustion circulation boost pressure control valve (403)
The task of the control valve is to convert electronic instructions from ECM in order to regulate a negative pressure that can affect the diaphragm in the swirl throttle switch. The negative pressure comes from the engine's vacuum pump, which always generates a predetermined negative pressure.
The control valve is grounded with a PWM pulse of 140 Hz through control module pin 43(M). The pulse ratio determines the size of the negative pressure in the hose to the swirl throttle switch. The position of the swirl throttle can thereby be controlled.
Pin No.
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Signal type
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Description
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1
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Power supply, B+
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Solenoid valve's power supply from the main relay.
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2
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Control
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Solenoid valve control lead. The solenoid valve is grounded from ECM pin 43(M).
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