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Diagnostic Trouble Code: B0012
Diagnostic Trouble Code Name: Driver Frontal Deployment Loop Stage 1
Vehicle Make: Holden
Vehicle Model: Cruze (J300)
Diagnostic Code Entered By: ZerOne
Diagnostic Code Entered On: Wed Oct 06, 2010 11:00 pm
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Please Note: The DTC Information provided has been randomly generated.
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Diagnostic Trouble Code Description:
Intake Manifold Tuning Valve Solenoid Control Circuit High
Voltage
Possible Sensor Faults
ECM
Possible Related Diagnostic Trouble Codes
DTC P0661 or P0662
Circuit / System Description
The intake manifold tuning solenoid valve system uses variable air induction tuning in order to achieve maximum performance and efficiency over the entire operating range of the engine. The characteristic torque curve of a normally aspirated engine depends mainly on how the engines average pressure changes over the engine speed range. The average pressure is proportional to the volume of the air mass present in the cylinder when the inlet valve is closed. The design of the inlet system determines how large an air mass can be drawn into a cylinder at a given engine speed. An intake manifold tuning solenoid valve is used to change the intake manifold plenum configuration. When the intake manifold tuning solenoid valve is open, the intake manifold is configured to one large plenum. When the intake manifold tuning solenoid valve is closed, the intake manifold is configured to 2 smaller plenums. The 2 intake manifold plenum sizes result in different torque curves, which improves performance at low and high engine speeds. During low speed, high load conditions, the intake manifold tuning solenoid valve is closed creating a longer runner path inside the plenum, which increases torque. During higher engine speeds and loads, the intake manifold tuning solenoid valve opens, creating a shorter runner path inside the plenum, which increases horsepower.
The intake manifold tuning solenoid valve actuator solenoid has the following circuits:
Ignition voltage
Intake manifold tuning solenoid valve actuator solenoid control
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