E30 series BMW 3

since 1983-1994 of release

Repair and car operation

+ 1. Maintenance instruction
+ 2. Maintenance
- 3. Engine
   + 3.1.2. Specifications
   + 3.2. Dismantle and major maintenance of the engine
   - 3.3. Engine electric equipment
      3.3.2. Specifications
      3.3.3. The battery - engine start-up in emergency situations
      3.3.4. Removal and battery installation
      3.3.5. Power cables
      - 3.3.6. Ignition system Check of system of ignition Check and installation of the moment of ignition (only for TCI system) Ignition distributor Ignition coil Shaper of impulses and block of electronic ignition A gap in the shaper sensor (TCI system) Sensors of system of ignition
      + 3.3.7. System of a charge of the battery
      + 3.3.8. System of start-up of the engine
      3.3.9. Malfunctions of the generator
      3.3.10. Main malfunctions of electric equipment
+ 4. Cooling system
+ 5. Heating and ventilation
+ 6. Fuel system
+ 7. Exhaust system
+ 8. Transmissions
+ 9. Coupling
+ 10. Brake system
+ 11. Running gear
+ 12. Body
+ 13. Electric equipment
+ 14. Good advice


3.3.6. Ignition system Introduction


The type of systems of ignition is specified in subsection 3.3.2.

TCI system

System contactless, the structure of system of this type includes the shaper of starting impulses, the block of electronic ignition, the coil and spark plugs. The block of electronic ignition is arranged according to the scheme of the capacitor store and works from the impulses arriving from the shaper. The gap in the induction sensor of the shaper of impulses is regulated (see subsection

DME system

Work of system of ignition of this type the electronic processor block (ECU-blok) operates. ECU-blok provides automatic adjustment of a corner of an advancing of ignition according to signals from sensors which trace various parameters of the engine. The distributor of ignition of this system provides only separate giving of a high voltage on candles and is mounted on a head of cylinders.

Automatic control of the moment of ignition is provided with a way of comparison of data with the reperny. In early systems Motronic sensors of a reperny point of the moment of ignition and speed of rotation of the crankshaft which are mounted over a flywheel on the left side of the engine are provided. In late systems Motronic one sensor which unites these both functions, mounted on a crankshaft pulley is provided.


On a part of cars the VMT sensor which is mounted in a forward part of the engine is provided. This sensor is intended for system of diagnostics of car-care center and system of ignition does not treat.

At performance of checks and repair of system of ignition it is necessary to observe the following safety rules.

1) In TCI system check reliability of connection of the block of ignition with weight.

2) At connection (+) – the conclusion of a tachometer should be connected with (-) – a conclusion on the ignition coil, connection to the distributor of ignition is forbidden.

3) Do not allow a contact of conclusions of the coil of ignition with weight. Otherwise failure of the block of electronic ignition and the coil is possible.

4) At refusal of start-up of the engine or on the idle engine do not leave ignition included for a while bigger 10 minutes.