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Engine load Crankshaft position sensor Camshaft Hall sensor Coolant temperature sensor Intake air temperature sensor/charge air. Coil ignition: The ME control unit interrupts at the point of ignition timing at the ground end the ignition ECI ignition system (engine 137): The ME control unit actuates the output stages in the ECI ignition
The ignition angle can only be checked with the HHT/STAR DIAGNOSIS. 2. Ignition angle adaptation 2.1 Catalytic converter heating-up (warming-up) The ignition angle is continuously retarded for about 20 seconds in order to more rapidly warm up the catalytic coolant temperature at start > 15 °C and < 40 °C Selector lever position P or N At the same time idle speed is increased by the idle speed control. 2.2 Idle speed To assist the idle speed control, the ignition angle can be retarded by as much as 36° crank angle or advanced by Altering the ignition angle provides a more rapid control than altering the position of the throttle valve (idle 2.3 Deceleration fuel shutoff The ignition angle is briefly retarded when combustion is resumed (fuel injectors actuated) in order to prevent a 2.4 Intake air temperature/coolant temperature The ignition angle is retarded under load, as a function of the intake air temperature and coolant temperature, in
2001 Mercedes-Benz ML320 1998-2005 ENGINE Electrical System - Engine - 163 Chassis
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