Audi A3

since 1997 of release

Repair and car operation



Audi A3
+ Maintenance instruction
+ Current leaving and service
+ Engine
+ Systems of cooling, heating
+ the Power supply system and production of the fulfilled gases
- Engine electric equipment
   + System of electronic control by ignition and injection
   - Charge and start systems
      Storage battery
      Removal and installation of the storage battery
      Check of the storage battery
      The generator - general information and security measures
      Check of the established generator
      Removal and generator installation
      Check and replacement of brushes of the generator and tension regulator
      Starter - general information
      Check of system of start of the engine
      Removal and starter installation
      Check, removal and installation of the traction relay of a starter
+ Manual box of gear shifting
+ Automatic transmission and models with a full drive
+ Coupling and power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment
+ Elektroskhema









38a8de3e


Check of system of start of the engine

GENERAL INFORMATION

If the starter does not work in the provision of a key “engine start”, the following reasons are possible:

– The accumulator is faulty.
– Break of an electric chain between the ignition lock, the traction relay, the accumulator and a starter.
– The traction relay is faulty.
– Mechanical or electric defect of a starter.

For check of the accumulator light headlights. If they grow dull in some seconds, means, the accumulator is discharged. Recharge or replace the accumulator. If headlights do not grow dull, include a starter and watch light. If they grow dull, means, tension arrives to a starter and malfunction is in it. If headlights continue to burn brightly (and there is no click of the traction relay of a starter), it specifies that there is a damage to an electric chain or the traction relay is faulty. If the starter rotates slowly, and the accumulator in a good condition, it specifies that the starter is faulty or there is a considerable resistance at an electric chain of a starter.

If damage to an electric chain is suspected, disconnect the accumulator and clear all connections and contacts in a starter power-supply circuit. Repeatedly connect the accumulator and, using the voltmeter, check tension on elements of an electric chain to a starter.

If the accumulator and an electric chain in a good condition, remove a food wire from the traction relay and connect to it the voltmeter. Turn the ignition key in situation “engine start”. In this situation there should be a full tension of the accumulator.
Contacts of the traction relay can be checked by voltmeter connection between contact of the traction relay connected to a starter and the earth. At ignition key turn in situation “engine start” the voltmeter should show tension. In the absence of tension the solenoid of the traction relay is faulty.

If the electric chain and the traction relay are serviceable, means, the starter is faulty.