Audi A4, S4

since 2000 release

Repair and operation of the car


Audi A4, S4
+ Introduction
+ Governing bodies and methods of safe operation
+ Current leaving and service
+ Engine
+ Cooling systems, heating and air conditioner
+ Power supply systems, release and decrease in toxicity of the fulfilled gases
- Systems of electric equipment of the engine
   + System of ignition and engine management
   + System of preheat of the diesel engine
   + Diagnostics of systems of electronic control and diagnostic equipment
   - Systems of charging and start
      General information
      The battery - the main data and acquisition of the new battery
      Check and charging of the battery
      Replacement of the battery
      Storage of the battery
      System of charging - general information and security measures
      Check of system of charging
      Removal and installation of the generator
      Removal and installation of the regulator tension/replacement of brushes
      System of start of the engine - the general information and precautionary measures
      Removal and installation of a starter
      Check of system of start of the engine
+ Manual box of gear shifting
+ Automatic transmission
+ Coupling, power shafts and differential
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment





Check of system of start of the engine

Scheme of connections of a starter and traction relay

Before carrying out check be convinced that the accumulator is completely charged, and the anticreeping system is not activated.

If on the car automatic transmission and a starter is established does not join, be convinced that the selector is in the provision of P or N.

Be convinced of that the accumulator is completely charged, on tips of wires and plugs of the battery and a starter there is no corrosion.

If the starter rotates, and an engine flywheel — no, that, possibly, the obgonny coupling of a starter is faulty (it does not allow a bendiks to rotate together with the engine after start). In this case the starter needs to be repaired or replaced. As other reason for that strong weakening of bolts of fastening of a starter can serve (the gear wheel of a bendiks does not enter gearing with a flywheel wreath).

If at inclusion of a starter its engine is not turned, and the involving relay works (clicks are audible), either the accumulator is discharged, or plugs of the involving relay are oxidized, or the starter is faulty (if the engine of the car is not jammed).

If at inclusion of a starter it is not audible even clicks of the involving relay, the accumulator is faulty, conducting is torn off or the involving relay is faulty.

 PERFORMANCE ORDER

  1. For check of serviceability of the involving relay connect the positive plug of a starter to the small plug of the involving relay. If the starter starts rotating, the involving relay as it should be, and either the lock of ignition, or conducting, or the sensor of the selector of automatic transmission is faulty (if the selector is in situation P or N).
  2. If after short circuit of plugs the starter rotates slowly, be convinced that the accumulator is charged, and wires are reliably attached. If the engine of the car is partially jammed or oil with high viscosity is filled in, the starter will also rotate slowly.
  3. Start the engine and warm up up to the working temperature. Kill the engine, take a safety lock of the fuel pump, and also disconnect electric sockets from ignition coils.
  4. Attach a positive wire of the voltmeter to the positive plug of the battery, and negative — to the negative plug.
  5. Include a starter and as soon as indications of the voltmeter are stabilized, write down them. Do not include a starter more, than for 15 seconds. If the speed of rotation of a starter normal, and voltage is more than 10.5 Volts, everything is all right. If voltage of 10.5 Volts and above, and the speed of rotation of a starter low, contacts of the involving relay burned slightly, the starter or conducting is faulty. If voltage less than 10.5 Volts and speed of rotation of a starter low, the starter is faulty or the accumulator is discharged.