E39 series BMW 5
since 1996-2001 of release
Repair and car operation
+ Maintenance instruction
+ Current leaving and service
+ Systems of cooling, heating
+ Power supply system and release
+ engine Electric equipment
+ Manual transmission
+ Automatic transmission
+ Coupling and power shafts
+ Brake system
+ Suspension bracket and steering
+ Onboard electric equipment
+ electric equipment Schemes
- System of onboard diagnostics
Data on diagnostic devices
Description of system of onboard diagnostics
Method of reading of blinking codes by a lamp “Check the engine” (It is possible on some models)
System of onboard diagnostics
Data on diagnostic devices
Check of serviceability of functioning of components of systems of injection and decrease in toxicity of the fulfilled gases is made by means of a universal digital measuring instrument (multimeter) (see an accompanying illustration). Use of a digital measuring instrument preferably for several reasons. First, on analog devices it is rather difficult (sometimes, it is impossible), to define result of the indication to within the 100-th and thousand shares while at inspection of the contours including in the structure electronic components, such accuracy takes on special significance. The second, the reason that fact is not less important that the internal contour of a digital multimeter, has rather high impedance (internal resistance of the device makes 10 megohms). As the voltmeter is connected to a checked chain in parallel, accuracy of measurement by that is higher, than the smaller current will pass through actually device. This factor is not essential at measurement of rather high values of tension (9 ÷12 B), however there is defining at diagnostics of elements giving out low-voltage signals, such, as, for example, a l-probe where it is a question of measurement of shares of volt.
Parallel supervision of parameters of signals, resistance and tension in all chains of management is possible by means of a splitter included consistently in the socket of the control unit by the engine. Thus on the switched-off, working engine or during car movement, measurement of parameters of signals on splitter plugs from what the conclusion about possible defects is drawn is made.
Special diagnostic scanners or BMW DIS, MoDIC testers can be applied to diagnostics of electronic systems of the engine, automatic transmission, ABS, SRS (programmed from PC). Besides, it is possible to apply scanners and specialized diagnostic analyzers to this purpose, for example CS 1000, Bosch FSA 560 (www.bosch.de), KTS 300, Sun 2013, or the ordinary personal computer with a special cable and the program OBD browser (for example, address on a site www.carsoftinternational.com/).
Some scanners, besides usual operations of diagnostics, allow, at connection with the personal computer, to unpack being stored in memory of the control unit schematic diagrams of electric equipment (if are put), to program anticreeping system, to observe signals in car chains in real time.
For diagnostics of your car you can download the free version of a browser of OBD II from our site arus.spb.ru or on www.obd-2.com; www.obd-2.de
Reading written down in memory of system of self-diagnostics of codes of malfunctions on some models can be made also on the indicator “check the engine” on a control panel.
The scanner only reads out the malfunctions brought memory and clears memory of malfunctions. The tester in addition can make active and show the current data.
Firm ToolRama, Inc devices also can be applied to diagnostics, for example. (3500 NW Boca Raton Blvd., Boca Raton, Florida, 33431, USA 1 877 866 5726-561 750 4511-561 338 8447 FAX) with cartridges for a certain model of the car.
All cartridges for a tester can be used and in the scanner. Thus functions will be limited only to reading and memory cleaning.
Firm ToolRama, Inc devices can be applied to diagnostics, for example. (3500 NW Boca Raton Blvd., Boca Raton, Florida, 33431, USA 1 877 866 5726-561 750 4511-561 338 8447 FAX):
The cartridge of OBD II carries out the following functions:
About devices you can get acquainted with details on sites www.programatools.com, www.bosch.de.
The ISO 9141-2 protocol is used.