Audi A4, S4
- Introduction
About this Management
Audi A4/S4 cars - the summary
Identification numbers of the car
Acquisition of spare parts
Technology of service, tool and workplace equipment
Poddomkrachivaniye and towage
Engine start from the auxiliary storage battery
Automobile himikaliya, oils and greasings
Diagnostics of malfunctions
+ Governing bodies and receptions of safe operation
+ Current leaving and service
+ Engine
+ Systems of cooling, heating and air conditioner
+ Power supply systems, release and decrease in toxicity of the fulfilled gases
+ Systems of electric equipment 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
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Diagnostics of malfunctions The description of diagnostics of electronic control systems and diagnostic codes are provided in the Head of System of electric equipment of the engine. In this Section the simplest scheme of clarification of the reasons of malfunctions and the refusals occurring in knots and systems of a vehicle is offered. Refusals and their possible reasons are broken into groups on the basis of the relation to certain components or car systems as, for example the engine, cooling system, etc., besides, in the text are given the references concerning these problems. Remember that the successful conclusion of search of causes of defect at all is not the black magic available to only skilled professional mechanics, and is defined by a combination of a certain knowledge and a patient, systematic approach to problem research. To move always follows from simple to difficult, to lead up each check to the logic end, and to try not to pass the obvious facts - everyone can forget to fill fuel in a fuel tank or to leave for the night included lighting devices. And at last, always it is necessary to try to make an accurate picture of development of malfunction and to undertake the corresponding steps on recurrence prevention. If refusal of electric equipment was the result of violation of quality of contact, check at the same time a condition of all other contacts and electric sockets of system. If the same safety lock several times in a row continues to fuse, there is no sense in its further replacement - it is necessary to try to find out a cause of failure. Remember that failure of a minor component can be a sign of violation of functioning of more important knot or the whole system. Engine If the engine is not started, it is necessary to analyse a situation. That the petrol engine in general could be started, should be satisfied two main conditions. In cylinders should arrive fuel - an air mix, and on a spark plug the spark should be developed. Therefore, first, it is necessary to check, whether fuel moves. Address to Head of the Power supply system, release and decrease in toxicity of the fulfilled gases. To define, whether the spark is developed, it is necessary to turn out candles, to insert into tips and separately to put to weight. Thus a tip or a cable of ignition do not hold hands, and use well isolated nippers. Ask the assistant to start the engine. If the spark is absent, address to the Head of System of electric equipment of the engine. Procedures of diagnostics of an electronic control system and codes of malfunctions are given in the Head of System of electric equipment of the engine. Engine start
All engines
- RKPP: Tighten the parking brake, completely squeeze out a pedal of coupling and hold it. A check point establish in neutral situation. The switched-off coupling facilitates engine start, especially at low external temperatures since thus there is no friction from a check point. - Automatic transmission: Establish the selector in the situation "R" or "N". Press a pedal of a brake and hold it.
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Do not include a starter more than 30 with continuously, the starter and cables otherwise overheat. |
Petrol engine
Turn the ignition key and include a starter, without giving thus gas. As soon as the engine will earn, release a key. If during 5 about the engine it is not started, press a pedal of gas a little and again repeat start. If the engine is not started or at once stops, repeat start with half squeezed-out pedal of gas and if start with completely squeezed out pedal of gas is required still. At the hot engine a gas pedal during start slowly squeeze out.
Surely at once begin movement, only at a hard frost let's to the engine get warm during 30 pages.
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Unsuccessful attempts of start of the engine following one after another can harm to the catalytic converter since not burned down gasoline gets to it and when heating blows up. |
Diesel engine - On the cold engine: Include ignition and wait when the control lamp of preheat will go out. At once after the control lamp went out, start the engine, without giving thus some gas. If at start there are irregular flashes, include a starter until then (at most 20 c) while the engine will not start to work independently. If after all the engine is not started, turn the ignition key in situation "0" and wait for about 30 pages. After that once again warm up the engine and repeat start as it is described above.
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While preheat is made, it is not necessary to include powerful electric consumers, otherwise the storage battery without need is overloaded. |
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The diesel engine with direct injection, as a rule, demands use of preheat only at temperature below 0°С. |
If the fuel tank was completely emptied, start process after filling lasts more long (to 1 mines) since air from fuel system thus is removed. - On the warm engine preheat is not required. Start the engine at once, without giving some gas. The engine is not turned in start attempts
Corrosion of plugs of the battery takes place or weakened fastening of tips of wires on them. Check a condition of plugs and tips. Tighten terminal clips, if necessary remove corrosion traces.
The battery is discharged or faulty. If tips of wires are found pure and reliably fixed on battery plugs, turn the ignition key in the situation ON, then include headlights and/or windscreen cleaners. If this electric equipment does not function, the battery is discharged.
Transmission it is inexact it is established in the situation "R".
Conducting in a chain of system of start is torn off or weakened fastening of wires on plugs. Check a condition of wires, plugs and electric sockets of the battery, the traction relay of a starter and the ignition lock.
The gear wheel of a starter is jammed in a gear wreath of a driving disk. Try to turn the engine for a crankshaft pulley. At the first possibility remove a starter and check a condition of a gear wheel and a gear wreath.
The traction relay of a starter (The head of System of electric equipment of the engine) is faulty.
The starter (The head of System of electric equipment of the engine) is faulty.
The ignition lock is faulty.
The engine is turned, but not started
Start is incorrectly made (Address to the materials presented above).
The engine immobilizator is faulty or is not disconnected.
The safety lock is faulty:
Electric fuel pump;
Electronic system of injection.
Concerning check of safety locks address to Head Onboard electric equipment.
Empty fuel tank or poor-quality fuel is filled in.
The air filter is strongly polluted. Leakages of vacuum in elements of supply of air, malfunction in a control system of injection of fuel and ignition take place.
The battery (the engine is turned too slowly) is discharged. Check electric equipment functioning (address to the previous Section).
Korrodirovana terminal connections of the battery or were weakened by their fastening (address to the previous Section).
The fuel pump is faulty, fused its safety lock or the pump relay is damaged. Check aurally noise of operation of the pump at ignition inclusion (Head of the Power supply system, release and decrease in toxicity of the fulfilled gases).
Components of system of ignition (The head of System of electric equipment of the engine) are damaged or excessively humidified.
Spark plugs are worn-out or faulty or the candle gap (The head of System of electric equipment of the engine) is incorrectly exposed.
Conducting of an electric contour of system of start is torn off or disconnected or weakened fastening of wires on plugs (address to the previous Section).
Conducting of a contour of the coil of ignition is torn off or disconnected or weakened fastening of wires on coil plugs (The head of System of electric equipment of the engine).
The control unit safety lock is damaged by the engine, is faulty any of sensors: A hall, the pulse sensor, the sensor of temperature of cooling liquid or soaked-up air (The head of System of electric equipment of the engine).
Too low pressure of a compression. Replace sealing laying of a head of cylinders. If necessary repair the engine.
Diesel engine
Start is incorrectly made.
The engine immobilizator is faulty.
The safety lock is faulty:
Electric fuel pump;
Preheat systems.
The engine is not heated-up: proverteispravnost of functioning of the device of preheat.
On the electromagnetic locking valve there is no tension. Connect to the switch the voltmeter or a sampler on a light-emitting diode. Include ignition. The light-emitting diode should light up. Otherwise it is necessary to find break of electroconducting and to eliminate it.
The electromagnetic locking valve is faulty. Check reliability of fastening of the electromagnetic switch, check contacts. Switch on and off ignition. In the switch click should be distributed.
Damage to the line of supply of fuel or air to lines takes place:
Pipelines or hoses are mechanically damaged or littered. Clear fuel pipelines and remove air from lines and the filter.
The fuel filter is littered. Replace filtering element.
In the winter it is necessary to check the filter and pipelines on ice or wax existence. Put the car in heated garage, add in gasoline system.
Ventilation of a tank or the mesh filter of a toplivozabornik is littered. Clean.
Adjustment of the beginning of supply of fuel is brought down. Check, make adjustment.
Nozzles are faulty. Check. Unscrew consistently cap nuts - at an otvorachivaniye of a nut of the faulty cylinder turns of the engine will not fall.
The fuel pump of a high pressure (TNVD) is faulty. Establish for check new, or obviously serviceable TNVD.
Too low pressure of a compression. Replace sealing laying of a head of cylinders. If necessary repair the engine.
The starter functions without an engine provorachivaniye
Start of the cold engine is complicated
Start of the hot engine is complicated
Gearing of a starter occurs is too noisy or with difficulty
Teeth of a gear wheel of a starter or flywheel wreath are worn-out or damaged.
Bolts of fastening of a starter are lost or weakened effort of their tightening.
The engine is started, but immediately глохнет
The engine immobilizator is faulty.
Electroconducting is faulty or weakened fastening of wires on coil or generator plugs.
Malfunction a power supply system or electric equipment component (Heads of the Power supply system, release and decrease in toxicity of the fulfilled gases and System of electric equipment of the engine) takes place.
Base installations of the block of electronic control (ESM) are broken.
Damage to release system / catalytic converter.
Depression losses through prokladochny surfaces of the inlet pipeline or the block of injection of fuel take place. Make sure of reliability of an inhaling of fixing bolts/nuts, check the fact and quality of fastening on the unions on the inlet pipeline of all vacuum hoses. Check a condition of hoses and correctness of their connection (to the unions).
Stability of operation of the engine on single turns is broken
Diesel engine
Quality of connections of fuel hoses on TNVD and the fuel filter is broken. Replace fuel hoses, fix them collars, tighten screws of angular connections.
TNVD fastening is mechanically damaged or weakened. Check fastening.
Are mixed by junctions of the returnable pipeline and the pipeline of supply of fuel. Connections put on the places. The screw of connection of the returnable pipeline has “OUT” marking.
Damage to the line of supply of fuel takes place:
Pipelines or hoses are mechanically damaged or littered. Clear fuel pipelines.
The fuel filter is littered. Replace filtering element.
In the winter it is necessary to check the filter and pipelines on ice or wax existence. Put the car in heated garage, add in gasoline system.
Ventilation of a tank or the mesh filter of a toplivozabornik is littered. Clean.
Adjustment of the beginning of supply of fuel is brought down. Check, make adjustment.
Nozzles are faulty. Check. Unscrew consistently cap nuts - at an otvorachivaniye of a nut of the faulty cylinder turns of the engine will not fall.
The fuel pump of a high pressure (TNVD) is faulty. Establish for check new, or obviously serviceable TNVD.
Ignition admissions take place at operation of the engine on single turns
Ignition admissions take place at car movement on transfer
Engine глохнет
The engine does not develop full capacity
In addition for the diesel engine
The air purifier is littered. Clean or replace.
Non-uniform supply of TNVD fuel on cylinders. Adjust on the heated-up engine.
The moment of the beginning of supply of TNVD fuel is incorrectly established. Establish.
The fuel filter or TNVD (nozzle) is littered. Wash out the preliminary filter, replace an element of the filter of thin cleaning, clean a spray or replace the pump (nozzle).
Adjustment of the maximum frequency of rotation of a cranked shaft is broken.
There are cottons in system of an admission or shots in release system
At movement with acceleration or uphill there are detonation sounds
Kalilny ignition (the engine continues to work after ignition switching off) takes place
The diesel engine smokes
Black smoke:
The air purifier is polluted. Wash out and fill with fresh oil or replace an element.
Inappropriate fuel is applied. Wash out a tank and replace fuel.
The moment of the beginning of giving of TNVD is incorrectly established.
Dark blue smoke:
Oil burning in the combustion chamber owing to wear of piston rings, high level of oil in an air purifier, wear of epiploons in covers of a turbokompressor, formation of thinnesses in laying between a block case and a turbokompressor. Repair the engine, establish normal level of oil, replace epiploons, tighten bolts of fastening of a turbokompressor or replace laying.
Fuel to one of nozzles does not move. Check on heating of final branch pipes of a collector.
Bad dispersion of fuel by a nozzle because of malfunction of the valve or spray break. Grind in the valve or replace a nozzle.
White or brown smoke:
Low temperature in cooling system. Check the thermostat.
Bad work of nozzles owing to wear or spray break. Replace a spray.
Engine electric equipment Procedures of diagnostics of an electronic control system and codes of malfunctions are given in the Head of System of electric equipment of the engine. The battery does not "hold" a charge
The control lamp of a charging does not die away at increase in turns
The driving belt is weakened. Check a natyazhitel of a maple belt.
Damage of the obgonny coupling. Remove the generator and turn a power shaft of the generator to the left. If the working surface of a pulley does not rotate, damage, as a rule, in the obgonny coupling.
Damage of a regulator of the tension/generator. Disconnect a wire (D +) from a reverse side of the generator and include ignition. If now the control lamp does not light up, malfunction, as a rule, in a regulator of tension or in the generator.
Wear of brushes. Visually check brushes, if necessary replace.
Wire damage between the generator and a tension regulator.
Damage of the block of the dashboard.
The control lamp of a charging does not light up at ignition inclusion
The control lamp of a charging burns after ignition switching off
Diodes are punched. Check diodes, replace a diode payment.
Starter If the starter does not turn, at first it is necessary to check, that on the plug 50 traction relays at least 10 V.Esli's necessary tension tension was lower than this value, it is necessary to check the wires entering into a contour of a current of a starter according to the scheme. Whether works a starter at full tension of the battery, it is possible to check as follows. - Not including transfers, include ignition.
- Close starter plugs 30 and 50 a wire of section at least 4 mm2, address also to materials of the Head of System of electric equipment of the engine. If the starter works faultlessly, the cause of defect should be looked for in wires to a starter. If the starter does not earn, it should be checked in the removed condition.
Check condition: In places of connection of a wire should be well fixed and should not be oxidized. The starter does not rotate at turning on of the lock of ignition
The battery is discharged. Charge the battery.
Close starter plugs 30 and 50: If the starter rotates - break of a wire 50 to the ignition lock takes place, the starter switch is faulty. Eliminate break, replace defective details.
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