Menu
Home
Forums
New posts
Search forums
What's new
New posts
Latest activity
Members
Current visitors
Log in
Register
What's new
Search
Search
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Reply to thread
Click here to become an Official Member of BMW Club Malaysia
Download Form
Home
Forums
The BMW Range
3 Series
E46
Battery indicator come out
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Message
<blockquote data-quote="jarance" data-source="post: 614655" data-attributes="member: 21"><p>From BMW WDS.</p><p></p><p><strong><u>BSD interface to the alternator</u></strong></p><p>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.</p><p></p><p><strong>Function</strong></p><p>The following functions have been implemented in the engine control unit for the alternator with BSD interface:</p><p></p><p>-Activating/deactivating the alternator on the basis of appliable parameters</p><p></p><p>-Specification of the maximum permitted degree of utilisation of the alternator</p><p></p><p>-Control of the alternator's load response</p><p></p><p>-Calculation of the alternator moment degree of utilisation</p><p></p><p>-Diagnosis of the data line between the alternator and the engine control</p><p></p><p>-Filing of alternator faults in the defect code memory</p><p></p><p>Activating the load control lamp in instrument cluster via CAN</p><p></p><p>In comparison to alternators used so far, the display strategy of the load control lamp does not change when the alternator with BSD interface.</p><p></p><p>The basic function of the alternator is also ensured if the communication between the alternator and the engine control is interrupted.</p><p></p><p><strong>Possible faults</strong></p><p>The following possible faults can be distinguished from fault entries:</p><p></p><p>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.</p><p></p><p>-Mechanical fault: The alternator is mechanically blocked or the belt drive has failed.</p><p></p><p>-Electrical fault: Exciter diode defect, excite interruption, overvoltage due to controller defect.</p><p></p><p>-Communication failure: Line defect between the engine control and alternator.</p><p></p><p>The following cannot be detected: Coil interruption or short-circuit</p><p></p><p><strong>Battery charge indicator lamp</strong></p><p>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).</p><p></p><p><strong>Detection</strong></p><p>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.</p><p></p><p>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.</p><p></p><p><strong>Aim</strong></p><p>The precise calculation of the alternator moment and control of the load response function enables good idling of the engine.</p><p></p><p>Control of the alternator voltage based on nominal values from the engine control enables a good charge balance of the battery.</p><p></p><p>Look like your alternator maybe giving too much Voltage Output.</p><p></p><p><strong><em>You can use the OBD Special Function to check the voltage output if you do not a voltmeter.</em></strong></p><p><strong><em></em></strong></p></blockquote><p></p>
[QUOTE="jarance, post: 614655, member: 21"] From BMW WDS. [B][U]BSD interface to the alternator[/U][/B] 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. [B]Function[/B] 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. [B]Possible faults[/B] 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 [B]Battery charge indicator lamp[/B] 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). [B]Detection[/B] 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. [B]Aim[/B] 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. Look like your alternator maybe giving too much Voltage Output. [B][I]You can use the OBD Special Function to check the voltage output if you do not a voltmeter. [/I][/B] [/QUOTE]
Verification
Post reply
Home
Forums
The BMW Range
3 Series
E46
Battery indicator come out
Top
Bottom
