S40/V40
1. General information
2. Operation and maintenance of the car
3. Design and technical characteristics of engines
4. Repair of the engine
5. Transmission
6. Brake system
7. Forward suspension bracket and steering
8. Back suspension bracket
9. Control system of the Fenix 5.1 engine
9.1. Description of system
9.2. Diagnostics
9.2.1. Check of some elements of a control system of the engine
9.2.2. Survey and detection of defects
10. Electric equipment. Conducting and components
11. Body
12. Schemes of electric equipment
 



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9-2-2-osmotr-i-vyyavlenie-defektov.html

9.2.2. Survey and detection of defects

Tightness check
vacuum and air hoses
At violation of tightness of inlet hoses the excess amount of air, as a rule, comes to the engine. It will affect functioning of some elements of electric equipment, such as regulator of idling and oxygen sensor.
If operation of the car continues at violation of tightness of hoses, adaptive values will differ from normal and there is possible a registration of codes of the malfunctions connected with adaptive control of composition of mix.

Air filter
and air inlet
At a contamination of the air filter or an air inlet the insufficient amount of air will come to the engine. It will be especially noticeable at acceleration and in the conditions of the raised loading.

       PREVENTION
1) At accession or a detachment of the BU socket or measuring block ignition has to be switched off, and the wire is disconnected from a negative conclusion of the rechargeable battery. It is necessary to remove control units, for example, when drying in the furnace after painting. Blocks should not be affected by temperatures exceeding +80 °C. When carrying out welding works with the help of arc welding to disconnect BU sockets. It is necessary to remove BU if welding works are performed in close proximity to it. When replacing BU to check a condition of conducting and components of system in order to avoid failure of the new block because of not eliminated malfunctions; 2) It is necessary to switch off ignition at:
— accession or detachment of the test equipment;
— accession or detachment of BU sockets;
— accession or detachment of the coil of ignition or wires of spark plugs;
— production of measurements of resistance by means of an ohmmeter;
3) When checking a compression:
— to disconnect the ignition block socket (for the prevention of breakdown on a plait of wires of system of electric equipment);
— to disconnect sockets of nozzles (to exclude hit of fuel in engine oil);
4) When carrying out tests of various components it is important to be convinced that tension of the rechargeable battery corresponds normal (about 12 V). If necessary during tests it is possible to connect the charger. The most admissible charging current 15 A. Not to disconnect a wire at the working engine. At the accelerated charge to disconnect wires from the rechargeable battery;
5) At launch of the engine from a foreign source use of the device for the accelerated charge or a source with tension more than 16 V. Neobkhodimo is not allowed to show the maximum care to exclude sparking, especially when checking nozzles. As the system of ignition works at a high tension, a touch to components of a high-voltage chain, such as ignition coil, tips of spark plugs, dangerously. Dangerous tension is present at all system, at sockets and t of.
6) Purity is especially important at works in fuel system;
7) Before demontazhy carefully to clear connecting elements of fuel-supply lines;
8) At repeated connection of elements always to use new consolidations.


Long operation of the car with the littered air filter or an air inlet can cause difference of adaptive sizes from normal.

System of production of the fulfilled gases
At violation of tightness of an exhaust pipe perhaps podsasyvany in system of air owing to pressure pulsations. If violation of tightness takes place above the oxygen sensor, the system will interpret it as work on the grown poor mix and changes will be respectively made to function of adaptive control of composition of mix. Long operation of the car with the broken tightness of system of production of the fulfilled gases can cause difference of adaptive sizes from normal and lead to registration of failure in system of adaptive control of composition of mix.

Nozzles
At a nozzle contamination (or nozzles) in the engine less fuel will move. It can lead to unstable work idling.

Fuel pressure
Pressure of fuel corresponding to specifications is necessary for ensuring injection of the required volumes. The lowered pressure of fuel is the reason of operation of the engine on the regrown poor mix, and pressure overestimated in comparison with normal causes reenrichment of fuel mix.
Long operation of the car in the conditions of the increased or lowered pressure can be the reason of difference of adaptive sizes from normal and lead to registration of codes of malfunctions in the control system of composition of mix.
Residual pressure of fuel
Low residual pressure is a sign of violation of tightness of the regulator of pressure or a nozzle. It can become the reason of failures at launch of the heated-up engine. Long operation of the car at violation of tightness in a nozzle can be the reason of difference of adaptive sizes from normal and lead to registration of codes of malfunctions in the control system of composition of working mix.

Fuel filter
At a contamination of the fuel filter pressure of fuel goes down therefore there are failures characteristic of the cases described above in the Fuel Pressure and Residual Pressure points.
Long operation of the car in conditions when pressure of fuel is excessive a little, can be the reason of difference of adaptive sizes from normal and lead to registration of codes of malfunctions in the control system of composition of mix.

Fuel pump
The faulty fuel pump can be the reason of pressure decline of fuel therefore there can be failures characteristic of the cases described above in the Fuel Pressure and Residual Pressure points.
Long operation of the car in conditions when pressure of fuel is excessive a little, can be the reason of difference of adaptive sizes from normal and lead to registration of codes of malfunctions in the control system of composition of mix.
System of protection against emissions of evaporations of fuel (SZVI)
Malfunction in the SZVI system can lead to uncontrollable absorption of vapors of gasoline.
Long operation of the car with malfunctions in the SZVI system can be the reason of difference of adaptive sizes from normal and lead to registration of codes of malfunctions in the control system of composition of mix.

Butterfly valve
At insufficiently open butterfly valve in the engine the insufficient amount of air moves and he can become deaf. If it is open excessively, vapors of gasoline can be soaked up through the SZVI system, forming at the same time the enriched fuel-air mix.

Compression
The unstable compression can become the reason of bad acceleration performance, loss of power and unstable operation of the engine. Especially it will be noticeable during the work idling.
Installation of the camshaft
The wrong position of the camshaft rather cranked can be the reason of early or late opening of valves and consequently also losses of engine capacity.

Ventilation of a case
The hose of system of ventilation of a case is connected to the inlet pipeline and provides removal of oil vapors from a case. At excess of level of oil or at pollution by its gasoline fuel-air mix will be excessively enriched owing to what there will be a violation of adaptive function of control of composition of mix.
Long operation of the car with the polluted oil in the engine can be the reason of difference of adaptive sizes from normal and lead to registration of codes of malfunctions in the control system of composition of mix.

Flywheel
The sensor of frequency of rotation and the provision of a bent shaft of the engine gives a malfunction signal on BU if the flywheel underwent deformation or other damage. The drive plate at engines with the automatic transmission is extremely sensitive to mechanical influences. For this reason it is not recommended to be used for latching or a provorachivaniye of the engine.
Damage of a drive plate is fraught with emergence of failures at launch of the engine and can become the reason of its unstable work.

Spark plugs
Wear of spark plugs has an adverse effect on fuel combustion. The most general symptoms at wear of spark plugs is unstable operation of the engine idling and the increased NANOSECOND level (hydrocarbons).
Check of productivity of a gasoline pump

Switch off ignition.

Fig. 9.6. Check of productivity of a gasoline pump


Disconnect a drain hose from the regulator of pressure and connect instead of it a hose which end lower in measured capacity. Remove the system relay of engine management. Peremknite contacts of base of the relay 2 and 8 (fig. 9.6) on 30 pages.
Normal productivity at a voltage of 12 V — 0,83 l, at 12,5 B — 1 l.
Check of pressure in fuel system
Switch off ignition. Remove a cap from the service union and attach to it the manometer. Remove the system relay and you peremknit contacts of 2 and 8 (fig. 9.6). With the established pressure switch off a gasoline pump. Normal pressure is about 300 kPa. Read the instrument of the manometer in 20 minutes. It has to be not less than 200 kPa. If pressure less, so the system is untight.

Check of nozzles

Fig. 9.7. Check of a nozzle: and — check of resistance of a winding of a nozzle; — check of tension on nozzle windings


The form of a fuel torch on all nozzles has to be identical. If the form of a torch of one of nozzles differs, nozzles demand washing. Being under pressure, the closed nozzle has to pass no more than one drop a minute. Resistance of windings of nozzles (fig. 9.7) is equal:
— for early models — about 12 Ohms;
— for late models — 14 — 15 Ohms.
Tension measured between the 1st contact of the socket of a nozzle and weight "—" (fig. 9.7) of the car has to be about 12 V. at an engine provorachivaniye a starter.

Check of the sensor of situation
butterfly valve

Fig. 9.8. Check of the sensor of provision of a butterfly valve: and — check of resistance; — check of tension


At the switched-off ignition disconnect the socket of the sensor and measure resistance between its conclusions In and With (fig. 9.8). Smoothly turn the gate from one extreme situation in another. At the same time resistance has to change from 1330 Ohms (at open gates) to 2260 Ohms (at closed). Check supply voltage in the socket for what include ignition and measure tension between contacts And yes Century. It has to be about 5 Century.
Check of the sensor of absolute pressure of air in an inlet collector
Switch off ignition and after a detachment of the socket of the sensor include again.

Fig. 9.9. Check of tension of the sensor of absolute pressure of air in an inlet collector


Measure tension between contacts of the socket of an electrical wiring And yes With (fig. 9.9). It has to be about 5 Century. For check of operation of the sensor at the switched-off ignition slightly put forward, without separating the socket to provide access to contacts. Measure tension between contact In the socket and "weight" in two modes:
1. Ignition is included — 4 — 4,5 In
2. The idling mode — 0,9 — 1,5 Century.
If the voltmeter shows these values, the sensor is efficient.

Check of the sensor of temperature
air
The air temperature sensor at 20 °C has to have resistance of 3000 — 4000 Ohms.

Fig. 9.10. Measurement of size of resistance and tension on the air temperature sensor


Tension on the sensor socket at the included ignition between conclusions of 1 and 2 (fig. 9.10) has to be about 5 V. Napryazheniye at the connected sensor and the included ignition between the second contact of the socket and "weight" at a temperature of 20 °C there have to be about 2 Century.

Check of the regulator of management
idling

Fig. 9.11. Measurement of size of resistance and tension on the idling regulator


At the switched-off ignition disconnect the socket of the valve and measure resistance between contacts (fig. 9.11). It has to be 8 — 11 Ohms.
Check tension between contact of 1 socket and "weight". It has to be about 12 Century.
Check of the coil of ignition

Fig. 9.12. Measurement of size of resistance and tension when checking the coil of ignition


For check of supply voltage at the switched-off ignition disconnect the electric socket of the coil, install the voltmeter between contact of 3 (fig. 9.12) of the socket of conducting and "weight" and scroll the starter engine. The voltmeter has to show tension of the rechargeable battery. For check of primary winding check resistance between contacts 1 and 3 coils of ignition. It has to be 0,5 — 1 Ohms. Resistance of a secondary winding has to be 10 200 Ohms.

Check of the sensor of situation
bent shaft

Fig. 9.13. Measurement of size of resistance and tension when checking the sensor of provision of a bent shaft


At the switched-off ignition disconnect the socket and measure resistance of the sensor (fig. 9.13). It has to be 200 — 350 Ohms. At the switched-off ignition disconnect sockets of nozzles and without disconnecting the sensor socket, connect the voltmeter to contacts of the socket. (scale of alternating current). Scroll the engine a starter. Between contacts there has to be a pulsing tension of 1,8 Century. For check of the operating tension on the disconnected conducting socket at the included ignition measure tension between contacts 1 both "weight" and 2 and "weight". In both cases tension has to be 3,3 Century.

Check
oxygen sensor
For check at the switched-off ignition disconnect the electric socket of the sensor. Include ignition. Measure tension between contacts 1 both "weight" and contact 4 and "weight". Between the 4th contact and "weight" there has to be tension of 0,4 Century.

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