Ahojte chlapi.BMW E46 320D 100kW za studena velmi tazko startuje.Skontroloval som zhavice su funkcne.Mam diagnostiku KTS,ziadna chyba,snimac teploty ukazuje spravny parameter,RJ zhavenia necvakne,len ked s nejakim drotom "dam" minus na RJ zhavenia na ten kolik,ktory vedie od RJ motora.Ten kolik musi dostat minus ked je motor studeny/ale aky studeny/?Ked cvakne,tak samozrejme motor hned naskoci.Chcem sa vas spytat,doba zhavenia zavisy od teploty chladiacej zmesy alebo od teploty vzduchu?Co mam este skontrolovat?Podla mna je snmac teplloty OK aj RJ zhavenia.Tak potom co to moze byt?Diki za odborne rady.

Kukni aku teplotu meria DDE motora... podľa toho je odvodená doba žhavenia... DDE si zapne žhavenie na kolko chce...

Pri cca 30C musi fungovat zhavic ci uz nie?Snimac teploty je ok,mera skutocnu teplotu.

Nie, funguje až pod 20 stupňov...

mam podobny problem. vsetko je v poriadku zhavice zhaviaca skrinka snimac teploty motora ,ale RJ nedostane pokym k zhaveniu.co tam moze byt za problem?

luky71 napísal:

mam podobny problem. vsetko je v poriadku zhavice zhaviaca skrinka snimac teploty motora ,ale RJ nedostane pokym k zhaveniu.co tam moze byt za problem?

na to si ako prišiel,???

cerpadlo je po repase zhavice vymenene. po zapnuti kluca necvakne cievka zhaviaceho modulu a tym nezhavy. ked odojim snimac teploty motora tak cievka zopne nazhavy a auto chyti na prvu. lenze pri odpojeni tohto snimaca sa rozbehne ventilator chladica na plne gule.snimac tepl. mot. je ok skusali sme ho vymenit. takze neviem.

funguje to žhavenie až pod 20stupnov testoval si to pri takejto teplote???a ešte zavisí od baterky,či je v dobrej kodícii...

wds:
Preheating System DDE 3.0
The voltage for the preheater plugs is supplied via the preheater relay. The relay is switched by the DDE control unit.

The preheater plugs are designed as sheathed element preheater plug and equipped with a new plug connection. They are connected in parallel.

Preheater time control
The preheating duration is dependent on the engine coolant temperature and battery voltage and is indicated by the preheating/DDE indicator.

Preheating
Preheating takes place for approx. 2 seconds between 6 °C and 20 °C. No preheating takes place at temperatures above this value.

After-heating
After-heating takes place after engine start at temperatures below 40 °C in order to improve idle and exhaust characteristics.

Troubleshooting
The DDE control unit receives a fault signal from the preheater relay in the form of the S_GRS signal if there is a fault in the preheater plugs, preheater relay or in the voltage supply of the relay. The DDE control unit itself detects a short-circuit/open-circuit in the relay activation function. Fault code 8 "preheating system" is stored in both cases.