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Bmw 725 tds


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Salutare! Detin un bmw 725 tds din 1996 si ca problema nu imi porneste pompa din rezervor,masina porneste dar in limp si imi apare eroare "fuel inject.sys." si nu mai trage. Pompa este testata, releul la fel.chestia e ca releul pompei nu primeste semnal. Are momente cand e totul ok,dar mai rar. Un sfat ce sa mai verific, sau daca stie cineva de unde poate fi problema?

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5 hours ago, Titi53 said:

Salutare! Detin un bmw 725 tds din 1996 si ca problema nu imi porneste pompa din rezervor,masina porneste dar in limp si imi apare eroare "fuel inject.sys." si nu mai trage. Pompa este testata, releul la fel.chestia e ca releul pompei nu primeste semnal. Are momente cand e totul ok,dar mai rar. Un sfat ce sa mai verific, sau daca stie cineva de unde poate fi problema?

Salut,

Daca releul nu primeste semnal atunci verifica conductorul pe care vine semnalul, logic.

Spor.

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Pre-supply pump
The DDE 4.0 features two pre-supply pumps. One pump is located in the fuel tank while the other pre-supply pump is located on the vehicle floor in the fuel supply system. Both pumps are switched on and off by means of a relay and deliver the fuel via the fuel filter to the high pressure pump.
The engine continues to run in the event of the in-tank pump failing, however, this is not the case if the in-line pump fails.
Troubleshooting
The relay and relay activation are monitored but not the pumps themselves. Fault code 1250 "Relay pre-supply pump" is stored in the event of a defect in the relay.

image.png.738407aea244db256c8cb8200f3cbf02.png

  • De acord! 1
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1 minute ago, Titi53 said:

In releul pompei intra un fir care trebuie sa il actioneze, pe acel fir nu am tensiune, daca scot capacul releului si il actionez manual pompa 

Salut,

Pune ISTA si incearca sa pornesti pompa din soft. Daca nu merge inseamna ca ECU are o problema.

Bafta.

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4 hours ago, Titi53 said:

In releul pompei intra un fir care trebuie sa il actioneze, pe acel fir nu am tensiune, daca scot capacul releului si il actionez manual pompa porneste.

 

Banuiesc ca vorbesti de pinul 4 din releu, acolo vine masa ca si comanda nu plus.

Edited by zeronoo
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2 hours ago, zeronoo said:

Banuiesc ca vorbesti de pinul 4 din releu, acolo vine masa ca si comanda nu plus.

Exact. Greseala mea,am spus ca nu am tensiune. Din calculator nu imi da masa pt releu. Continuitate pe fir am dar nu pleaca din calculator. Daca ii pun masa eu porneste pompa la punerea contactului dar imi apare in bord aceeasi eroare si se limiteaza.

2 minutes ago, Titi53 said:

Exact. Greseala mea,am spus ca nu am tensiune. Din calculator nu imi da masa pt releu. Continuitate pe fir am dar nu pleaca din calculator. Daca ii pun masa eu porneste pompa la punerea contactului dar imi apare in bord aceeasi eroare si se limiteaza.

Si mai am o banuiala,dar nu stiu daca e posibil! Am observat ca uneori cand invart cheia in contact mai brusc porneste pompa si nu mai am nici o eroare,totul lucreaza ok. Exista vreo posibilitate sa fie din contact?

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