Resistance value for the MAF

[t_marat]

What is the resistance value of the MAF sensor for the M50TU engine? It is a hot film mass air flow sensor. Bentley lists the resistance value only for the M50 engine with hot wire sensor.
I think mine is dead as it is obvious somebody seems to have openned it before. But would like to be sure. I checked the voltage in the connector and I get about 12,30Volts in some of the pins.

Also, my thorttle position sensor resistance reads a range of 1,36Kohms to 4,22Kohms. Fine? Bentley gives values of 1-4Kohms but says it is approximate.

[danzee]

I have a 1995 E34/M50TU and a Fluke DVM. Tell me exactly where (which connectors and pins) you are measuring and I'll try to get you some values to compare.
Z


What is the resistance value of the MAF sensor for the M50TU engine? It is a hot film mass air flow sensor. Bentley lists the resistance value only for the M50 engine with hot wire sensor.
I think mine is dead as it is obvious somebody seems to have openned it before. But would like to be sure. I checked the voltage in the connector and I get about 12,30Volts in some of the pins.

Also, my thorttle position sensor resistance reads a range of 1,36Kohms to 4,22Kohms. Fine? Bentley gives values of 1-4Kohms but says it is approximate.

[shogun]

Now I wonder what the differences will be between the nice, expensive and very accurate FLUKE and t-marat's big investment for his DVV :D


I bought one locally. Paid 3.2$!
DCV: 200mV-100V
ACV: 200, 750
Amperage: 200microA - 10A
Resistance: 200Ohms - 2MOhms
No measurement range for capacitors.
Guess more than enough
Wonder if someday China will start producing goods for free

Yes, my next target is a FLUKE

[t_marat]

MAF is located just after the air filter box. It has a connector which is screwed into it. There are 4 pins. I have no idea which pins I should measure. But if you take general measurements and tell me the values I would be more than happy.

[t_marat]

Picture of my MAF, obvious somebody openned it and tried to seal it back.
Anybody could advise me the resistance values? I measured something like 0.6-0.7 Ohms through right upper and lower pins. Other two pins does not seem to have any kind of circuit.

[Rustam]

Picture of my MAF, obvious somebody openned it and tried to seal it back.
Anybody could advise me the resistance values? I measured something like 0.6-0.7 Ohms through right upper and lower pins. Other two pins does not seem to have any kind of circuit.

I think Danzee wants you to measure between arbitrary pins of your choice and give him the values for comparison...

[genphreak]

Picture of my MAF, obvious somebody openned it and tried to seal it back.
Anybody could advise me the resistance values? I measured something like 0.6-0.7 Ohms through right upper and lower pins. Other two pins does not seem to have any kind of circuit.Time to clean that bay dude!

[Bleeding_Knuckles]

corrosion facter
Time to clean that bay dude!

[t_marat]

Time to clean that bay dude!
Ya I know. But the climate at where I live is extremely dusty.

[t_marat]

Anybody can help me with the resistance value of the MAF? That thing is extremely expensive, about 400Euros for a new one!

When I unplug it while the engine is running, I see absolute no difference in idle quality. None at all. Tried disconnecting the battery for 2 hours (to reset the DME) and doing it again, no difference in idle again. Can I presume the MAF to be dead?

[t_marat]

I have found a used MAF for a reasanable price, seems to be in good condition. But it has 6 pins, whereas mine has 4 pins. Any way of using it in my car? It originally came from a 525i, m50TU engine.

[shogun]

What is the part number? Also mention the Bosch part number, to run across check.

[t_marat]

my MAF, 13621730033
http://www.realoem.com/bmw/showparts.do?model=HB51&mospid=47370&btnr=13_0381&hg=13&fg=15
My MAF does not have any numbers on top of it. Maybe on the underside, will check it out.

The other one:
028021201017185219
263191
Don't know which is the bosch number. wrote this down from the used one.

[shogun]

I found this one and the number seems to fit:
passend für: suitable for

BMW 850i/850Ci M70 (E31) und
BMW 750i (E32) und
BMW 520i M50 (E34) - 9.92 und
BMW 320i (E36) - 9.92
http://www.harald-heller.de/catalog/product_info.php?cPath=66_100_170_605&products_id=327

Here they do not mention the E34
http://www.data.bmrparts.com/bmwparts/8260013547715U.html

http://www.peugeotclub.org/peugeot/archive/General/2001/Apr/0114.html

http://www.realoem.com/bmw/showparts.do?model=GC81&mospid=47354&btnr=13_0355&hg=13&fg=15

But here is says only these
Part 13627527525 (RMFD-VOLUME AIR FLOW SENSOR) was found on the following vehicles:

E31 850Ci COUPE, M70, AUTO (EG23) : MASS AIR FLOW SENSOR
E31 850Ci COUPE, M70, MANUAL (EG13) : MASS AIR FLOW SENSOR
E32 750iL SEDAN, M70, AUTO (GC83) : MASS AIR FLOW SENSOR

-----------------------------------
So better do some more research on this. Anyway, the Bosch number is
Bosch Nr 0 280 212 010

[t_marat]

So it is safe to assume it will not fit my car. After all it has 6 pins, my MAF and the connector have only 4 pins.

When I check the MAF resistance I get about 0.6-0.8 ohms resistance on two of the 4 pins. Others does not seem to have any kind of circuit at all. Is it normal?