Ahojte. Auto: BMW E46 318i 105Kw 2003 N42B20 Po vymazaní mi za každým vyskočí chyba 28d7 Chyba komunikace. Dobíjanie som pozeral drží pekne 14,4 V sem tam si zvýši otáčky na voľnobehu aj.

Nejake rady ? Ďakujem.

http://www.lmgtfy.com/?q=28D7+Communica ... Alternator

Ale tam nič nieje o tom písané vo všetkých tých témach nieje napísaná odpoveď.

to bol len tip, ja som to necital

Ja som už zúfalý s toho, ale alternátor dobíja normálne.

Ak je dobra kabelaz do DDE, je v <> regulator... neodpoveda DDE jednotke...

BSD interface to the alternator
The alternator with BSD interface can actively communicate with the engine control unit. The alternator is not linked to the charge indicator lamp, only to the engine control unit. The alternator can detect a variety of faults.

Function
The following functions have been implemented in the engine control unit for the alternator with BSD interface:

-Activating/deactivating the alternator on the basis of appliable parameters

-Specification of the maximum permitted degree of utilisation of the alternator

-Control of the alternator's load response

-Calculation of the alternator moment degree of utilisation

-Diagnosis of the data line between the alternator and the engine control

-Filing of alternator faults in the defect code memory

Activating the load control lamp in instrument cluster via CAN

In comparison to alternators used so far, the display strategy of the load control lamp does not change when the alternator with BSD interface.

The basic function of the alternator is also ensured if the communication between the alternator and the engine control is interrupted.

Possible faults
The following possible faults can be distinguished from fault entries:

High temperature control: The alternator is overloaded; to be safe, the alternator voltage is reduced until the alternator has cooled down again. The charge indicator lamp does not light up.

-Mechanical fault: The alternator is mechanically blocked or the belt drive has failed.

-Electrical fault: Exciter diode defect, excite interruption, overvoltage due to controller defect.

-Communication failure: Line defect between the engine control and alternator.

The following cannot be detected: Coil interruption or short-circuit

Battery charge indicator lamp
The signal for the charge indicator lamp to light up is transferred across CAN to the instrument cluster. The charge indicator lamp lights up if there is mechanical and electrical fault (see above).

Detection
The above-mentioned calculation of the alternator moment and the rate of utilisation of the alternator are heavily dependent on the type (performance) and manufacturer.

This is why the alternator provides the engine control with this data. The engine control adapts its calculation and set values to the exact type.

Aim
The precise calculation of the alternator moment and control of the load response function enables good idling of the engine.

Control of the alternator voltage based on nominal values from the engine control enables a good charge balance of the battery.

Prosím ťa ako otestujem kabeláž do DDE ?? to je ten jeden červený káblik čo ide od alternátora ?? a keby bol zlý regulátor tak by držalo napatie 14,4 V ?

Edit: Lebo kontrolka na palubovke mi nesvieti

dobija baterku ?? ak ano tak neries ja mam tiez kopec chyb a auto ide ok este som nevidel auto bez jednej chyby

bterku dobíja, ale na základe tejto chyby mi kolísajú otáčky na voľnobehu lebo nemá komunikáciu z Alternátorom.

kubko45 napísal:

este som nevidel auto bez jednej chyby

tu ani neuvidis..ja som ale videl, kazde jedno moje

Určite to rieš, neviem v čom môže byť chyba ale netreba to nechávať tak. Potom sa nečudujem kubko45 že je tu kopec vrakov, ktoré ledva naštartujú... Doma mám 7 áut a ani na jednom nenájdeš v pamäti závad jedinú chybičku...