Audi 80/Avant
The description
Engines
System of release of the fulfilled gases
Cooling system
Fuel tank and the fuel pump
The air filter and intake channels
- Injection system
- System of injection Mono-Motronic
Operating procedure
Malfunctions and independent diagnostics
Independent repair
Visual check
Check of separate elements
Check of a mode of idling and the analysis of exhaust gases
Check catalytic neutralizer and a ljambda-probe
Trosovyj drive of "gas"
The list of malfunctions
System of injection Digifant
System of injection KE-III-Jetronic
Systems of injection MPI and MPFI
Coupling
Transmission and transmission
Suspension bracket and steering
Brake system
Antiblocking system of brakes
Wheels and tyres
body electrosystem
Ignition system
Illumination
Signalling devices
Devices and auxiliary devices
Heating and ventilation
Body elements
Search of malfunctions
Specifications
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Check of separate elements
Check of a regulator of position throttle заслонки
Following paragraphs describe a procedure for test of components of system of injection which can be spent in house conditions.
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- To disconnect the tip of a regulator of position throttle заслонки.
- To bring to connecting contacts позиционера the maximum pressure 6 In; a positive pole from above.
- At the 4-polar tip it is contacts 1 and 2 (both top).
- At the 6-polar tip it is contacts 1 and 6 (above and below).
- The necessary pressure it is possible to receive from 4,5-voltnoj batteries or 6-voltnogo a range charger devices.
- To replace a pole of a connecting wire (negative contact at the top contact pin).
- The pusher should be put forward completely.
- If all occurs how is described, means, the regulator of position throttle заслонки is perfectly in order. If is not present, it is necessary to replace it.
- In addition you can spend resistance measurements.
- Resistance of a winding of the auxiliary engine between already named connections 3–200 Ohm.
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Check of action of the switch of a signal of idling
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- To remove the tip from a regulator of position throttle заслонки.
- To connect an ohmmeter to contacts of the switch of a signal of idling.
- At the 4-polar tip it is contacts 3 and 4 (both bottom).
- At the 6-polar tip it is contacts 4 and 5 (to look down).
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The help: after replacement of a regulator throttle заслонки it is necessary to adjust the switch of a signal of idling is a work for a workshop. |
Check of a potentiometer throttle заслонки
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On the block of preparation of a gas mixture, in a direction on a car course, there is a regulator of position throttle заслонки (1) with the connecting tip (2). |
At the left: check of a potentiometer throttle заслонки: you should receive what indicators of resistance on the plugs of a potentiometer designated here, you can see in the table.
| Contacts |
Check conditions |
Resistance, Ohm |
| Mechanical transmission |
Automatic transmission |
| 1 5 |
1 7 |
– |
520 – 1300 |
| 1 2 |
1 2 |
From position throttle заслонка it is closed to it is opened approximately on 1/4: resistance increases, then becomes to constants |
600 – 3500 |
| 1 4 |
1 6 |
From position throttle заслонка it is closed to it is opened approximately on 1/4: resistance constant, then increases |
600 – 6600 |
On the right: check впрыскной an atomizer and the gauge of temperature of arriving air. On an illustration the arrangement of connections of the general tip is shown.
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- To disconnect the tip of a potentiometer throttle заслонки.
- To connect an ohmmeter according to the table to two of four plug contacts.
- If the specified sizes are not reached, means, the potentiometer throttle заслонки is faulty. Unfortunately, it is impossible to replace only it. All bottom part of the block of preparation of a gas mixture varies always.
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Check впрыскной atomizers
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- Check at the working engine: the oil temperature should make at least 60С that there correspond 10 mines of movement after start of the cold engine.
- To remove an air inlet branch pipe.
- To get the engine, to leave to work on single turns.
- To watch a stream of injected fuel. It should be uniform and directed on throttle заслонку.
- To muffle the engine, to check up tightness of the valve.
- At the switched off engine should act no more than two drops in a minute.
- The further checks to you will need to be spent, if the engine is not got.
- To check up safety locks 13 and 27.
- To remove the air filter and an air inlet branch pipe.
- The assistant should turn the engine a starter.
- The vprysknaja atomizer should inject fuel considerably.
- If it does not occur, to disconnect the brown tip above on the block of preparation of a gas mixture.
- To connect an ohmmeter to both average connecting contacts (on the block of preparation of a gas mixture).
- At an ambient temperature between 15 and 30С the ohmmeter should show 1,2—1,6 Ohm, the atomizer otherwise is faulty. To turn away the screw with звездчатой a head and to replace an atomizer.
- To check up power supplies впрыскной atomizers if it does not work despite true indicators of resistance.
- To connect the light-emitting diode voltmeter, without applying other device, to both average contacts in the removed tip.
- To include a starter: light-emitting diodes should замерцать, otherwise there is a breakage of conducting or malfunction of the block of management.
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Check of a stopping delivery of fuel in a mode of compulsory idling (at movement накатом)
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- To remove the air filter or an air inlet branch pipe.
- To get the engine, quickly to finish frequency of rotation to 3000 rpm, and then sharply to close throttle заслонку.
- Well visible впрыскная the stream впрыскной atomizers should in this the moment for short time stop. In this case the fuel stopping delivery in a mode of compulsory idling is perfectly in order.
- If is not present, to check up the gauge of angular moving throttle заслонки and the management block (in a workshop).
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Check of gauges of temperature
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On this diagramme you see indicators of the gauge of temperature of arriving air near to впрыскной an atomizer and also the gauge of temperature of a cooling liquid in a branch pipe at the left at the engine. The illustration shows size of resistance of the gauge depending on temperature. |
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- The gauge of temperature of arriving air: to disconnect the brown tip from above on the block of preparation of a gas mixture.
- To connect an ohmmeter to both external plug contacts.
- The gauge of temperature of a cooling liquid: to disconnect the tip on the gauge (dark blue) in a bulk branch pipe of a cooling liquid.
- To connect to plug contacts of the gauge an ohmmeter.
- Both gauges: to remove resistance indicators.
- Under the diagramme you can check up, whether there are indicators of resistance of gauges, and also temperature of air and охладающей liquids at the moment of measurement within an admissible range.
- If it so, means, gauges are perfectly in order.
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Check of pressure of giving of fuel
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- Pressure of giving of fuel can be precisely checked only the measuring device applied in a workshop.
- At suspicion on incorrect pressure of giving of fuel to disassemble a pressure regulator: to turn away 4 bolts with звездчатой a head.
- To check up, whether the membrane is damaged and whether there are no polluting adjournment.
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