Presentation on theme: "IDLE SPEED CONTROL. §To comply with federal emissions standards, idle speed control systems are used §Idle speed controlled by electronic module §Earlier."— Presentation transcript:
§To comply with federal emissions standards, idle speed control systems are used §Idle speed controlled by electronic module §Earlier systems, engines idled in open loop §Idle systems depend on inputs to PCM
Throttle Kicker controlled by Vacuum Diaphragm §Electrically controlled by solenoid §Operates during engine warm up, with air conditioning on and engine overheating §Some act as a dashpot 327C
Throttle Kicker and Idle Stop Solenoid §Electrically controlled §Vacuum operated throttle kicker for additional load §Allows curb idle speed to be lower §Controlled by PCM §Must be adjusted 327C
IDLE SPEED CONTROL MOTOR (ISC) §PCM controlled §Reversible gear drive dc motor §PCM reverses polarity §Has idle tracking switch §Must be adjusted 325C
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