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MAF diagram ?

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Discussion starter · #28 ·
OK, Have my PP2000 now, checked it all out and i still get the below (pictures) fault.

I know P103 is a HIGH input, but what causes it??? i still want to run 4 fresh wires to the MAF and one by 1 remove them untill the error comes back, then i will know what wire is damaged (if it is that) and replace it properly....

almost 3 onths i have spent trying to get rid of tgis antipollution message and code, and i am going slowly insane,

Please look at the below pictures and give me some advise if you can :)

I also put a picture of the maf wires on there so maybe someone could help me with where they go to, i have tried the DIAG diagrams and tried to pay fr 24 hour use but keeps not allowing it... so REALLY STUCK NOW!!!



HELP PLEEEEEEEEEASE :)
 

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Discussion starter · #30 ·
If i clear the codes, and start the car the fault will apear almost instantly in PP2000, then i can drive it fine and no message (antipollution) shows, I can drive it like that all day, but if i turn the engine on and off 2,3,4 times and then drive, the "antipollution" message apears flashing and beeping a me, allouth it does not seam to hinder performance.....

if i change the maf (i have 4 times!) i get P100 "sometimes" but ALLWAYS
P0103, also if i change the maf to one of the 4 i have it runs lumpy wen cold but fine after 2 mins of driving, if i put the origonal maf back on it runs fine hot or cold but throws up the antpolltion error?

I did once (and ony once) get a fault code on PP2000 saying bad positive to oil tem sender, but looking into it on PP2000 it is disabled (maybe my car does not have one? as i do not have a temp gauge inside the car for oil?
but even if i turn it on (enable) it in PP2000 it makes no differnce to my antipollution problem??? (i think the oil temp sender was just a 1 off glitch)

the car seams to run perfectly, just the anoying message that keeps coming up, and the code in PP2000 ??? is always there.

any ideas, i find it strange that it runs awfull cold with some mafs, and perfect with other mafs??? but always the P0103 code.....
 
Discussion starter · #32 ·
mastertech said:
Forget your flow meter.. its fine, the fault is telling you the air flow measured is abnormally high according to the programmed set parameters i the ecu.

its happing under load right ?
Click to expand...
Ohh, and yes i guess it is happening under load...

Also, on the graph you can see the ECU is reading only about 50% of what the MAF is reading (or might be the other way around....)
 
Discussion starter · #34 ·
mastertech said:
What fault returns first... after everything connected, and then faults cleared.
Click to expand...
ALWAYS P0103 returns first

P0100 is only a Sometimes thing, and only with 2 of the 4 mafs i have tried, but i put the origonal back on now and i ONLY get code P0103.... and the antipollution beeping message......
 
Discussion starter · #36 ·
mastertech said:
have you unplugged the flow meter sensor with the ignition on ! as i think thats why your getting p0100.
which screen shot with details is relevant to p0103.
Click to expand...

Never unplugged with ign on... i think it just might be pot luck with the P0100 fault..... as i say thats only a sometimes code and ONLY after i get the P0103 fault first.

99% of the time its ONLY P0103 fault.

There are 2 screen shots (you can see the P0103 code at the topn of the screen) that have the same fault, one of the times the P0103 code came up on idle (703 revs) the other time on 3,700revs, so it happens at adle and/or under load.... basicly its happenng all the time! :(
 
Discussion starter · #38 ·
mastertech said:
what i ment was which fault description tallies to p0103 the permeant or intermittent one ? sorry
Click to expand...
actually both of them!

the one with revs 703 is permenent
the 3700 revs is intermitant i think

is that what you mean?
i get both permenant and intermitant come up at the same time together, so really i have 2x P0103 codes all the time.....
 
#39 ·
right ok have you probed the connections in the air flow meter connector. possiblity of damaged connection to flow meter.

pin 4 of air flow plug, wire number 1203c is the 12v supply from the bm34 under bonnet fuse box (controler /ecu).. fuse 1 =20amp.

pin 1 of air flow plug, wire number 1340 or 1341 goes to engine ecu 48 way brown plug pin G2. this is air temp signal to ecu.

pin 2 of air flow plug, wire number 1336 goes to engine ecu 48 way brown plug pin E2. this is air flow signal ? not 100%

pin 5 of air flow plug. wire number 1333 goes to engine ecu 32 way grey plug pin A3 this is possibly air flow signal as well. not 100%

i would have a carefully look at the pins in the plug and look to see if the contacts are spread apart, if they are then your gonna need to remove the pin from the plug and re bend the contact surfaces.

if not obtain new plug and wiring and soldier in new plug.

sounds to mee that the pins are bent from probing ?!!
 
Discussion starter · #40 ·
mastertech said:
right ok have you probed the connections in the air flow meter connector. possiblity of damaged connection to flow meter.

pin 4 of air flow plug, wire number 1203c is the 12v supply from the bm34 under bonnet fuse box (controler /ecu).. fuse 1 =20amp.

pin 1 of air flow plug, wire number 1340 or 1341 goes to engine ecu 48 way brown plug pin G2. this is air temp signal to ecu.

pin 2 of air flow plug, wire number 1336 goes to engine ecu 48 way brown plug pin E2. this is air flow signal ? not 100%

pin 5 of air flow plug. wire number 1333 goes to engine ecu 32 way grey plug pin A3 this is possibly air flow signal as well. not 100%

i would have a carefully look at the pins in the plug and look to see if the contacts are spread apart, if they are then your gonna need to remove the pin from the plug and re bend the contact surfaces.

if not obtain new plug and wiring and soldier in new plug.

sounds to mee that the pins are bent from probing ?!!
Click to expand...
WOW!!!! thanks, that is EXACTLY what i need to try and fault find it! :) awesome there there, thansk again :)

i have checked the pins to see if they had spread or brocken and they are all good and touching the contacts, and i have use the old pin (as in sowing pin) in the conectors of the MAF down to the back of the engine with a multimeter and there are no breaks to that point, but i have been thinking all along that there is a break between the ecu and the back of the engine, but withot that excellent wiring route you just did i neve knew what wires to check coming out of the ECU, but know i can prob them all to see if there is a break from ECU to MAF, Perfect !!!

I will do this tomorrow and report back...

"IF" i probe the wires and find no breaks, does that mean i have an ecu fault???
 
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