Jump to content

Problema de nerezolvat releu si bujii E90 320d


Recommended Posts

Poi parerile noastre, sfaturi, idei, presupuneri, nimenu nu poate rezolva o problema doar asa din fata calculatorului.

 

Sunt putini aici care au avut probleme de genul asta, iar noi ceilalti doar "te indrumam" spre o posibila rezolvare, care se pare ca ai incercat sa o faci singur, doar cu cunostintele tale si ideile noastre.

 

Am sa-ti spun exact in ce conditii pornesc bujiile la modelul tau :thumbsup:

Link to comment
Share on other sites

[...] sa-ti joace feste si releul.... sa-ti dea tensiune de 5v si sa nu aiba amperaj suficient sa incalzeasca bujiile cat trebuie

Ups!

Asa ceva nu se poate. Te iertam insa daca ne argumentezi de ce nu se poate si care este greseala :)

 

Pentru simplifacre, sa presupunem ca vorbim de o tensiune continua de 5V, trecand peste faptul ca releul nu furnizeaza o tensiune continua de 5V, ci 5V este valoare medie a tensiunii. Bujiile sunt de fapt alimentate cu o pulsuri de tensiune (12V) modulate in latime.

Link to comment
Share on other sites

Glowplug system DDE6.0

 

The glowplug system consists of the following components: DDE control unit electronic glowplug control unit quick-start glowplugs Bit serial data interface (BSD) and electrical leads No glow-duration relay is fitted. The quick-start glowplugs are designed for a voltage of between 5.3 and 7.8 Volts. In the initial heating stage, system voltage may also be applied for a short time. The essential differences from the glowplug systems on previous models are as follows: control of the glowplugs is by pulse width modulation the glowplug relay has been dispensed with and its function taken over by electronic output stages on the glowplug control unit an emergency glowplug function has been introduced quick-start glowplugs have been introduced each of the four glowplug circuits can be diagnosed individually To check the glow system, there are two adapter leads: 1-pin, order number 13 6 470 12-pin, order number 13 6 460 In conjunction with measurement box 26-pin, order number 61 1 459

 

Function

 

The glowplug control unit communicates with the DDE control unit via the bit serial data interface. The required heating output is determined by the DDE control unit on the basis of the following operational parameters: Coolant temperature Vehicle voltage Two other operational parameters determine the point at which glowplug function is activated and deactivated: Engine speed Injection volume The DDE control unit transmits the heating request to the glowplug control unit via the bit serial data interface. The glowplug control unit puts the request into effect by activating the glowplugs by means of a pulse-width modulated signal. In addition, the glowplug control unit sends diagnostic and status information back to the DDE control unit.

 

Preheating

 

At coolant temperatures below 25 °C, there is a preheating period of 0.5 seconds. The preheating period increases as the temperature falls, reaching a maximum of 2.7 seconds at a coolant temperature of less than -25 °C. Activation of the glowplug system on the instrument cluster only occurs at coolant temperatures below 0 °C.

After-heating

At coolant temperatures below 30 °C, there is a temperature-dependent after-heating period to improve idling and exhaust emission characteristics.

 

Start preheating

 

Start preheating takes place for approx. 10 seconds if after the preheating time has elapsed the engine is not started and the ignition remain on.

 

Troubleshooting

 

The DDE control unit monitors communication with the glowplug control unit. In the event of a fault on the bit serial data interface, the DDE control unit stores the following fault code: 4203, Glowplug control unit, no communication via bit serial data interface

 

The glowplug control unit monitors activation of the individual glowplugs and is able to detect the following faults and store them for each glowplug: Short circuit to earth Break Excess temperature output stage If the glowplug control unit detects a fault, it reports it to the DDE control unit which stores the fault in its fault memory.

Link to comment
Share on other sites

In aceasta seara am facut o testare si aveti aici atasat printscreen-ul cu ce mi-a dat dupa erorile de rigoare pe toate 4 bujiile

Se pare ca releul intrerupe, cel putin asa inteleg eu

Tu ai verificat bine legaturile electrice? Pare a fi vorba de o pana de contact pe undeva. Curentul e foarte mare si daca legaturile nu sunt ferme apar probleme.

Verifica atat legaturile electrice catre bujii cat si alimentarea modulului de comanda al bujiilor - releu cum ii spui tu.

Link to comment
Share on other sites

Astazi si ieri am fost la electrician si amandoi zicem ca am gasit vinovatul pentru problema mea.

 

Iata-l

 

Este cablul care pleaca de la electromotor si intra in releul

Mufa care intra in releu era decalita si corodata.

Acolo sunt doua lamele care prind un piciorus din releu care zice electricianul ca in timp s-a slabit si fiind un contact imperfect s-a incins, s-a decalit si si-a pierdut elasticitatea.

Prin acest cablu treceau numai 7A in test in loc cam de 40 zic eu.

L-am comandat, imi ajunge intr-o saptamane si a costat 130 lei

 

Oricum inginerii lu' peste cei de la BMW, cum au putut sa proiecteze sa treaca un curent de 40A printr-un contact cu lamele ...

post-58282-0-45883900-1380216779_thumb.jpg

Edited by razzzzvan
  • Like 1
Link to comment
Share on other sites

In final modulul nu se alimenta corect. Parca spuneai ca ai masurat tensiunea care ajunge la modul.

 

Oricum inginerii lu' peste cei de la BMW, cum au putut sa proiecteze sa treaca un curent de 40A printr-un contact cu lamele ...

De ce crezi ca n-ar putea trece un curent de 40A?

Link to comment
Share on other sites

In final modulul nu se alimenta corect. Parca spuneai ca ai masurat tensiunea care ajunge la modul.

 

 

De ce crezi ca n-ar putea trece un curent de 40A?

 

Tensiune era 12V dar datorita contactului imperfect prin cablu nu treceau mai mult de 7A ceea ce e foarte putin.

 

Poate trece dar solutia tehnica aleasa de a folosi un contact lamelar prin atingere la un curent de 40A este destul de puerila si predispusa la probleme de genul asta de-a lungul timpului.

Link to comment
Share on other sites

  • 1 year later...
  • 10 months later...

Aceiasi problema ca razvan o am si eu la un e90. Bujii bune, incercate cu admisia jos, releu nou si totusi, eroare pe toate 4... Cand e motorul cald, sterg erorile, nu mai apar pana se raceste cat de cat motorul! Banuiesc ca la incalzirea motorului se dilata ceva... As vrea sa stiu cum se schimba acel cablu si daca e posibil ca si șaiba din capatul celalalt sa fie corodata pe electromotor...

Cat despre mufa care intra in releu, m-am gandit sa ii fac o prindere sanatoasa printr-un papuc destul de sanatos, argintat, care intra destul de fortat pe acea lamela de alimentare a releului...

Ceva sfaturi?

Edited by B3free
Link to comment
Share on other sites

Colegul Razvan spunea ca prin mufa lamelara care alimenteaza releul nu trece amperajul necesar...

Bujiile le-am incercat cu un tester, am luat plusul de pe borna si am pus in capul lor si s-a aprins acel beculet rosu al testerului, deci au continuitate! Si m mult de atat, am observat ca am curent in fisele bujiilor, mereu, chiar daca nu e contactul pus!

 

Exista o interfata care poate face un test releului sau care poate citi data in care fiecare bujie s-a ars, in cazul in care ar fi bujiile duse?

Link to comment
Share on other sites

Deci tu crezi ca toate masinile au problema asta, insa doar utilizatorul razzzvan a descoperit-o?

Razvan a avut o anumita problema cu acel cablu. Asta nu inseamna ca toata lumea va avea aceeasi problema. Cu atat mai putin ca 100% tu ai aceeasi problema.

 

N-am idee ce ai masurat tu cu multimetrul si daca ai masurat corect sau nu.

 

Pe tester ai eroare de bujii? De fapt ai facut diagnoza? Iti apar toate bujiile? Daca apar toate, trebuie schimbate toate, inclusiv releul.

 

Mi se par niste discutii destul de ciudate, se face din tantar armasar. N-a inventat nimeni mersul pe jos, iar apa la robinet nu e tocmai o noutate.

Edited by Service Premium
Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
  • Recently Browsing   0 members

    • No registered users viewing this page.
×
×
  • Create New...

Important Information

Prin folosirea acestui site, sunteti de acord cu Terms of Use. Gasiti aici Guidelines. Politica de cookies: We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.