BMW 5 Series E39

since 1996-2001 release

Repair and operation of the car

+ Introduction
+ Maintenance instruction
+ Current leaving and service
+ Engine
+ Cooling systems, heating
+ Power supply system and release
+ Engine electric equipment
+ Manual transmission
+ Automatic transmission
+ Coupling and power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment
+ Schemes of electric equipment
- System of onboard diagnostics
   Data on diagnostic units
   Description of system of onboard diagnostics
   Method of reading of the blinking codes on a lamp "Check the engine" (It is possible on some models)
   Diagnostics codes

System of onboard diagnostics

Data on diagnostic units

Use at diagnostics of the considered systems of a digital multimeter with a high impedance significantly increases the accuracy of the performed measurements

Recently, at diagnostics of control systems of the engine of modern cars such reading-out devices as hand scanners of type, for example, of Actron Scantool, AutoXray XP240, or KTS 100 (Bosch) became absolutely irreplaceable

Check of serviceability of functioning of components of systems of injection and decrease in toxicity of the fulfilled gases is made by means of the universal digital measuring instrument (multimeter) (see an accompanying illustration). Use of the digital measuring instrument is preferable 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 electronic components in the structure, such accuracy is of particular importance. The second, not less important, the fact that the internal contour of a digital multimeter, has rather high impedance is the reason (internal resistance of the device makes 10 megohms). As the voltmeter is connected to the checked chain in parallel, the accuracy of measurement of subjects is higher, than smaller current will pass through actually device. This factor is not essential at measurement of rather high values of tension (9 ÷12 V), however becomes defining at diagnostics of the elements giving low-voltage signals, such as, for example, l-probe where it is about measurement of shares of volt.

Parallel observation of parameters of signals, resistance and tension in all chains of management is possible by means of the splitter included consistently in the socket of the control unit of the engine. At the same time on the switched-off, working engine or during the movement of the car, measurement of parameters of signals on splitter plugs is performed from what the conclusion about possible defects is drawn.

The special diagnostic scanners or testers of BMW DIS, MoDIC (programmed from PC) can be used to diagnostics of electronic systems of the engine, automatic transmission, ABS, SRS. Besides, it is possible to use scanners and specialized diagnostic analyzers to this purpose, for example CS 1000, Bosch FSA 560 (, KTS 300, Sun 2013, or the ordinary personal computer with a special cable and the program OBD browser (for example, address on the website

Some scanners, besides usual operations of diagnostics, allow to print out, at connection with the personal computer, the schematic diagrams of electric equipment which are stored in memory of the control unit (if are put), to program anticreeping system, to observe signals in car chains in real time.

You can download the free version of a browser of OBD II for diagnostics of your car from our website or on;

Reading of the codes of malfunctions which are written down in memory of system of self-diagnostics on some models can be made also on the indicator "check the engine" on the 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.

Devices of ToolRama, Inc can be also used 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 also in the scanner. At the same time functions will be limited only to reading and cleaning of memory.

Devices of ToolRama, Inc can be used 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):
   -  R000 tester with a cartridge T051D or the P000 scanner with T041 cartridge,
   -  universal N000 cable,
   -  N001 socket.

The cartridge of OBD II performs the following functions:
   -  Reading and removal of codes of malfunctions of OBD II. Reflection of results of tests of the sensor of oxygen.
   -  Continuous control of systems of ignition, injection and components.
   -  Reflection of the list of the current data and the recorded unstable refusals:
      •  Absolute pressure in the inlet pipeline;
      •  Oxygen sensor tension;
      •  Temperature of cooling liquid of the engine;
      •  Settlement loading of the engine;
      •  Car speed;
      •  Quality of fuel;
      •  An air consumption (on weight);
      •  Ignition advancing;
      •  Provision of a butterfly valve;
      •  Temperature of the soaked-up air.

About devices you can get acquainted with details on the websites,

The diagnostic 16-contact socket (X19527) of system of onboard diagnostics of OBD II is located on the central console

The ISO 9141-2 protocol is used.
The standard cable with the J1962 socket is applied to connection.

conclusion No.


1 It is set by the producer
2 -
3 It is set by the producer
4 Case
5 The case - an alarm conclusion
6 It is set by the producer
7 Line K
8 It is set by the producer
9 It is set by the producer
10 -
11 It is set by the producer
12 It is set by the producer
13 It is set by the producer
14 It is set by the producer
15 Line L
16 Plus batteries through a safety lock. Energized at any position of the lock of ignition