190E 2.3 (201.024) L4-2.3L (102.961) (1984)
Throttle Position Switch: Testing and Inspection
Testing wide open throttle/closed throttle position switch
Preceding work:
Removal and installation of throttle valve assembly
Note: Check closed throttle position stop only in the case of wide open throttle/closed throttle position switch with wide open throttle/closed throttle
speed detection.
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Set ohmmeter to measuring range 0 - infinite.
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Check full throttle stop by pressing switch against wide open throttle stop. The readout should be 0 ohm. Turn throttle valve slightly towards
closed throttle position: this must cause the readout to show infinite ohm.
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Check closed throttle position stop by pressing throttle switch against closed throttle position stop. Turn throttle switch far enough to obtain a
readout of 0 ohm. Raise throttle switch 0.2 mm; this must cause readout to show infinite ohm.
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Closed throttle position contact:
closed throttle position approx. 0 ohm
wide open throttle position approx. infinite ohm
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Wide open throttle position contact:
closed throttle position approx. infinite ohm
wide open throttle position approx. 0 ohm
partial throttle position approx. infinite ohm