Thursday, January 2, 2020

2010 Mercedes Benz C 300 (204.054) V6-3.0L (272.947) Page 871


- Check internal resistance of component B2/5b1 (Intake air temperature sensor).



1.2.2. Check plausibility of actual value B2/5b1 (Intake air temperature sensor) in control module ME 9.7.



Image legends



- Picture1



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



- Connector (5-pin)



- Picture2



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



- Connector (4-pin)



Test prerequisite



- The actual value is not o.k.



Test sequence



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



- Switch on ignition.



Status of relevant actual value:



- Intake air temperature:Warning! Communication with ECU required.



Specified value



- If the connector is unplugged at component B2/5b1 (Intake air temperature sensor), value [ -40锟斤拷 C ] is displayed.



- Bridge pin 2 in pin 3 at the unplugged connection of component B2/5b1 (Intake air temperature sensor).The value is approx. [ 150锟斤拷 C ] for a



short period of time and drops back down to the substitute value of approx. [ -40锟斤拷 C ].



Question



- Is the actual value o.k.?