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Pontiac
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2001
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Sunfire L4-2.2L VIN 4
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Repair and Diagnosis
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Powertrain Management
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Computers and Control Systems
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Testing and Inspection
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Initial Inspection and Diagnostic Overview
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- Bi-Fuel/Alternative Fuels
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Vehicle On-Board Diagnostics (Accessing and Clearing Codes)
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Scan Tool Data Definitions
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Mixture Control Solenoid Command
Mixture Control Solenoid Command
Display shows frequency from 0 to
2000 Hz
. This display indicates the frequency or PWM signal the AF ECU is commanding the Mixture Control Valve. A higher frequency indicates the AF ECU is commanding more gas (rich).