190E 2.3 (201.024) L4-2.3L (102.961) (1984)
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Key To Symbols
Note
^ If the specified value of a test step, e.g. step 4.0, is in order, it is not necessary to perform test step 4.1. Different component designations are
possible depending on the wiring diagram or vehicles with optional equipment. These designations are given in parentheses. This has no effect
on the test (connections, specified value).
^ Idle speed control is independent of the air flow sensor potentiometer.
^ Engine speed increases when the coupling is disconnected from the decel fuel shutoff microswitch.
^ Test TD signal if readout on tester fluctuates and engine surges.
Test conditions:
^ Intake system without leaks.
^ Slide in idle speed air valve operates freely.
^ Engine oil temperature approx. 80 °C.
^ Coolant temperature sensor, decel fuel shutoff microswitch and idle speed detection throttle valve switch (RUF/KAT) in order.
^ Engine 102.983 Std.
Connect engine tester test cable (4) to test connection of idle air control valve X11/9.
The idle air control valve test connection X11/9 is located on the right in the component compartment.
