Monday, November 26, 2018

2010 Mercedes Benz C 300 (204.054) V6-3.0L (272.947) Page 957


Test sequence



- Switch off ignition.



- Remove component B2/5 (Hot film mass air flow sensor).



- Disconnect coupling M at component N3/10 (ME-SFI [ME] control unit).



M16/6r3 (Actual value potentiometer (sliding contact 1))



- Measure resistance with multimeter between sockets (M.88) 88 and (M.43) 43 of the 126-pole socket box tester.



- Slowly operate throttle flap by hand up to full load.



Specified values



- Throttle valve not actuated[ca. 1380]ohms



- Throttle valve fully actuated[ca. 480]ohms



M16/6r4 (Actual value potentiometer (sliding contact 2))



- Measure resistance with multimeter between sockets (M.64) 64 and (M.43) 43 of the 126-pole socket box tester.



- Slowly operate throttle flap by hand up to full load.



Specified values



- Throttle valve not actuated[ca. 650]ohms



- Throttle valve fully actuated[ca. 1490]ohms



Question



- Are the measurement values OK?



YES



The measurement values are OK.Further possible causes of fault



- Test voltage supply of the potentiometers of component M16/6 (Throttle valve actuator).



NO



The measurement values are not OK.Possible cause and remedy



- Lines to component M16/6 (Throttle valve actuator)



- M16/6 (Throttle valve actuator)



End of test



1.1.3. Perform mechanical inspection of component M16/6 (Throttle valve actuator).



Test sequence



- Switch off ignition.



- Expose component M16/6 (Throttle valve actuator).



- Slowly operate throttle flap by hand up to full load.



Specified value



- The throttle valve must not stick and must close by internal spring force.



Question



- Is the test o.k?



YES



The test is o.k..End of test



NO



The test is not o.k..Possible cause and remedy



- Check intake tract for residue and clean if necessary.If no residue is present, replace component M16/6 (Throttle valve actuator).



1314



Throttle valve jamming (iced up) (P2072)



Possible cause:



- M16/6 (Throttle valve actuator)