Saturday, September 7, 2019

2010 Mercedes Benz C 300 (204.054) V6-3.0L (272.947) Page 971


Image legends



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



- Connector (5-pin)



Test prerequisite



- The actual value is not o.k.



Test sequence



- Switch off ignition.



- Detach coupling at component B2/5 (Hot film mass air flow sensor).



- Measure direct voltage with multimeter between sockets (B2/5) 2 and (B2/5) 1



- Switch on ignition.



Specified value



- Voltage[11.0...15.0] V



Question



- Is the measurement value OK?



YES



The actual value is okay.Further possible causes of fault



- Unmetered air



- Signal wire



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



End of test



NO



The measurement value is not OK.Possible cause and remedy



- N10/1f43 (Fuse 43)



- Cable for voltage supply



End of test



2. No further information available.



1349



The measured air mass is implausible compared to the position of the throttle valve. (P0068)

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