E39 series BMW 5

since 1996-2001 of release

Repair and car operation

+ Introduction
+ Maintenance instruction
+ Current leaving and service
+ Engine
+ Systems of cooling, heating
+ Power supply system and release
- Engine electric equipment
   + ignition System
   + System of preheat of the diesel engine
   + charge and start Systems
+ Manual transmission
+ Automatic transmission
+ Coupling and power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment
+ electric equipment Schemes
+ System of onboard diagnostics

Engine electric equipment

General information

The structure of electric equipment of the engine includes all components of systems of ignition, start and a charge. In a type of that on the functional purpose these components belong to directly ensuring functioning of the engine, they are considered separately from components of onboard electric equipment, such as lighting devices, monitors, etc.

At work with electric equipment always it is necessary to observe certain security measures:
   a) Be careful - electrodevices especially easily fail at maloperation with them during check, connection and service.
   b) Do not leave ignition for a long time included at the switched-off engine.
   c) Never disconnect wires from the battery at the working engine.
   d) At connection of wires from the auxiliary power supply at emergency start of the engine observe polarity.
   e) Always disconnect a negative wire from the battery the first and connect the last in order to avoid short circuit at a casual contact the tool during time отдавания / tightenings of a clip of the plug.


Separate characteristics are provided also in the text of Head and in case of obligation of their performance are allocated with a bold print

System of ignition and DME management

Spark plugs with two electrodes of weight



BKR of 6 EK





520i, 523i, 528i

Engine type


Turns of idling, rpm

750 ± 50

Maximum turns, rpm

6500 ± 50

Concentration WITH volume, % before/after
catalytic converter

0.7 ±0.5/0.5 ± 0.3

Resistance at +20°С (if it is not set differently):


Pulse sensor
turns/situation numbers

1280 ± 128 Ohm

Pulse sensor of recognition of the cylinder


 •  between conclusions 1 and 2

</= 1.0 Ohm

 •  between conclusions 2 and 3

> 10 megohms (infinitely)

Sensor of temperature of the engine


 •  at temperature
cooling liquid 20 ° ± 3°С

2.2-2.7 kiloohm

 •  at temperature
cooling liquid 80 ° ± 3°С

2.2-2.7 kiloohm

The sensor of temperature of soaked-up air


 •  at air temperature 20 ° ± 3°С

2.2-2.7 kiloohm

 •  at air temperature 50 ° ± 3°С

0.76-0.91 kiloohm

Ignition coil


 •  primary winding

0.8 ± 0.1 Ohm

 • secondary winding

it is not measured

Spark plug tip

5 kiloohms of ± 500 Ohm

Storage battery


12 In, negative weight



 • 520i, 523i, 528i

70 Ach

 • 535i, 540i, 525tds

90 Ach

Charging degree  

 • it is completely discharged, density

1.15, 16 °Ве

 • полуразряжена, density

1.22, 24 °Ве

 • it is completely charged, density

1.26, 30 °Ве

The electrolit density in all banks should
to be identical, the maximum difference

no more than 0.04 g/ml

Greasing for battery plugs

Bosch Ft 40 v 1

Food element brelka of remote control







Current, And

80 (бенз.), 110 (диз.)




Capacity, kW


Efforts of a tightening of carving connections

The moments of an inhaling of fixture are given in the text of Head and on some иллюстрациях*.
*vydelenny in the text a bold print the moments of an inhaling are subject to exact observance; the efforts not allocated with a bold print are given only roughly



Spark plugs

25 Nanometers