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
      - 3.3.7. System of a charge of the battery Check of system of a charge of the battery Generator Tension regulator Brushes
      + 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

4d3121b2 Check of system of a charge of the battery

1. Check a condition and a tension of a belt of the generator. At detection of signs of wear a belt replace.
2. Check an inhaling of bolts of fastening of the generator and an adjusting bolt of a tension of a belt.
3. Check conducting of the generator and a tension regulator, reliability of fastening and a condition of sockets.
4. Check safety locks.
5. Start the engine and check a sound published by the generator (the howling or squealing sound indicates wear of bearings or a belt proskalzyvaniye).
6. Check electrolit density in the battery. If density low, charge the battery (this point does not belong to unattended batteries).
7. Check degree of a charge of the battery (at faulty section of the battery its recharge is possible).
8. Disconnect cables from the battery and check a condition of plugs and poles.
9. Check existence of short circuit, having disconnected a cable from (-) – poles and having included between a pole and a cable a lamp. If the lamp lights up, in a chain of the car there is a short circuit.
10. Disconnect from the wire generator. If the lamp goes out, replace the generator. Otherwise establish a chain, consistently deleting safety locks to a lamp pogasaniye.
11. Check tension on the battery on the idle engine which about 12 Century should be.
12. Start the engine and again check tension which should be now from 14–15 Century.
13. Include a driving beam of headlights. At normal work of system of a charge tension should fall and again increase.
14. If tension is higher than normal tension of a charge, replace a tension regulator (see subsection If tension is lower normal, the rectifier, a regulator or the generator are faulty.
15. If short circuit is absent, but the battery all the time is discharged, the reasons are malfunction of the battery, the rectifier, a regulator, the generator (brushes, the rectifier, rotor or stator windings) or a weak tension of a belt of the generator. The generator is not subject to independent repair.