SEQUENTIAL DYNAMIC AIR INTAKE SYSTEM (S-DAIS) CONTROL OPERATION [13B-MSP]
id0140g1304200
Operation Outline
• Operates the SSV solenoid valve, the APV motor, the VFAD solenoid valve (with VFAD), and the VDI solenoid valve (13B-MSP(high power)) according to the engine speed range.
Operation list
Engine speed range and operation conditions for each valve
On: Energization, Off: Non-energization, Open: Valve opens, Closed: Valve closes
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Item
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Engine speed range
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Low speed
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Medium speed
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Medium-high speed
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High speed
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SSV
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Solenoid valve
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OFF
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ON (Secondary injector is operating)
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Valve
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Closed
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Open
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VFAD
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Solenoid valve
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OFF
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ON (Approx. 5,250 rpm or more)
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Valve
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Closed
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Open
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APV
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Motor
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OFF
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ON (Approx. 6,250 rpm or more)
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Valve
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Closed
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Open
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VDI
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Solenoid valve
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OFF
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ON
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Valve
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Closed
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Open
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Operation
SSV solenoid valve
• Turns on at the same time as the injection timing of the secondary injector. Due to this, the intake manifold vacuum is fed to the SSV actuator allowing intake air from secondary port which is opened by the SSV valve.
VFAD solenoid valve (with VFAD)
• At an engine speed of less than 5,250 rpm, the VFAD solenoid valve turns off and feeds intake manifold vacuum to the actuator (valve closes).
• At an engine speed of 5,250 rpm or more, the VFAD solenoid valve turns on and feeds BARO to the actuator (valve opens).
APV motor
• When the following conditions are met, a duty signal is sent to the APV motor, the APV gradually opens. If an APV-open condition is not met, a minus duty signal is sent to the APV motor, reversing the motor and closing the APV.
APV-open condition
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― Engine speed: 6,250 rpm or more
― ECT: Approx. 70 °C {158 °F} or more
VDI solenoid valve (13B-MSP(high power))
• At an engine speed of 7,650 rpm or more, the VDI solenoid valve turns off and feeds intake manifold vacuum to the actuator (valve opens).