190E 2.3 (201.024) L4-2.3L (102.961) (1984)
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^ As of 09/89 and model year 1990: idle speed control with heating speed. This is activated for not more than 28 seconds after each start
(conditions: closed throttle position contact closed and selector lever in position "P" or "N").
Test conditions
^ Engine coolant temperature sensor, decel fuel shutoff microswitch and idle speed detection throttle valve switch (RUF/KAT) in order.
^ Intake system not leaking.
^ Engine oil temperature approx. 80°C.
Test Steps 1.0 - 1.4
