Maf sensor

[stupid one]

Hi Folks, any help would be appreciated.

Got a P0102 code on my W203 2005 C180. Car runs quite well and still getting OK mpg.
I have tried to do some investigations and I have come up with the following.
The four pins on the back of the connector are as follows.

Pin 1 yellow and white, Ive got continuity on this so assume an earth.
Pin 2 Red & Green 12 v supply.
Pin 3 Brown which I think is the output signal, there is no continuity, no signal and reading 0g/s when car idling and reving.
Pin 4 Light brown and yellow again got continuity so I assume another earth.

My deductions are the MAF is toast as it is not sending a signal back to the ECU hence the 0g/s reading.
I have inserted a photo from the plug.
However, any help before I shell out for a new one would be appreciated please.

 

[alexanderfoti]

Brown is ground
red with green strip is sensor power (12v)
yellow/white is maf signal
yellow/brown is temp sensor signal.

where are you getting 0g/s from?

 

[stupid one]

Dear Alexander, many thanks for your reply.......
The 0g/s was with my friends very basic obd reader.

I have been trying to read up and did some basic tests last night on the plug terminals whilst disconected.

I'm not getting continuity on the brown wire with ignition on or off to chasis.
I get continuity on the yellow/brown & Yellow/white connected to chasis.
I get 12.25 volts on red & Green to ground on the chasis.
I get 11.3 volts on red & green connected to brown wire.

Any help would be apprecited as I'm at my wits end.
Many thanks
Stu