> Diagnostics of a control system by the engine. Daewoo Matiz (since 1997 of release)
Daewoo Matiz since 1997 of release
1. The general data
2. Maintenance service
3. The engine
3.1. A mechanical part of the engine
3.2. Cooling system
3.3. An electric equipment
3.4. A control system of the engine
3.4.1. The description of elements of system and their work
3.4.2. Diagnostics of a control system by the engine
3.4.3. Repair of knots and control system elements
3.5. System of release of the fulfilled gases
4. Transmission
5. A running gear
6. A steering
7. Brake system
8. Systems of heating, ventilation and air-conditioning
9. A body electric equipment
10. A body
11. Schemes электроборудования
 









3-4-2-diagnostika-sistemy-upravleniya-dvigatelem.html

3.4.2. Diagnostics of a control system by the engine

Diagnostics of codes of malfunctions
Dump of codes of malfunctions
For prevention of damage of the electronic block of management (ЭБУ) at a detachment or repeated connection of food ЭБУ ignition should be switched off (for example, the plug of the storage battery, socket ЭБУ, safety lock ЭБУ, crosspieces etc.). When ЭБУ establishes a diagnostic code of malfunction, the control lamp of malfunction lights up; the diagnostic code of malfunction will be kept in memory ЭБУ. When malfunction has faltering character, i.e. appears periodically, the bulb dies away, if malfunction does not appear any more. The diagnostic code of malfunction remains in memory ЭБУ, pressure of the storage battery will not be disconnected yet. The detachment of pressure of the storage battery on 10 with "will clear" memory ЭБУ of all kept diagnostic codes of malfunction.
Memory ЭБУ should be cleared of a diagnostic code of malfunction after repair end. Diagnostic tables will help to clear a diagnostic code of malfunction before use of schemes. It allows ЭБУ to establish a diagnostic code of malfunction at passage of the scheme which will help to find a cause of defect faster.
Operations of reinstallation of idling
When plugs of the storage battery, ЭБУ or safety lock ЭБУ are disconnected or replaced, execute below-mentioned procedure of reinstallation of idling:
- Turn a cranked shaft for short time and switch off ignition (without starting up the engine). Engine start-up can occur, but it not a problem;
- Start up the engine. Operation of reinstallation of idling is finished.
Check of system of diagnostics
Check of system of diagnostics — the ordered method of definition of the problem created by malfunction of system of the electronic control of engine management.
It should become an index point for diagnostics of any malfunctions of controllability because specifies to the technical worker in the following logic step to diagnostics. The understanding of tables and their correct use will reduce time for diagnostics, will prevent unnecessary replacement of parts.
Check of system of diagnostics is resulted in tab. 3.10.

Table 3.10    Check of system of diagnostics
Step
Performed works
Yes
No
11
Check up complaints of the client.
Whether complaints of the client are confirmed?
The step 2 see
-
22
Include ignition, without starting up the engine.
Whether the control lamp of malfunction through 4 c dies away?

Step З see
3
Close plugs And and From a data transmission socket (a diagnostic socket).
Whether the control lamp of malfunction of diagnostic codes of the malfunctions kept in memory flashes?
The step 4 see
See «the control lamp of malfunction does not flash»
43
1. Connect сканнер to a data transmission socket.
2. Include ignition, without starting up the engine.
Whether shows сканнер the consecutive data?
The step 5 see
The step 12 see
54
Start up the engine.
Whether the engine was started up?
The step 6 see
The Cranked shaft see «rotates, but the engine is not started up»
65
1. Switch off ignition.
2. Connect сканнер to a data transmission socket.
3. Include ignition, without starting up the engine.
Whether were highlighted on the screen сканнера diagnostic codes of malfunctions?
The step 8 see
The step 7 see
76
1. Start up the engine.
2. Compare the data shown on сканнере with typical values.
Whether are the shown size within a normal amount?
The step 9 see
The step 10 see
87
See the corresponding table of diagnostic codes of malfunctions. See tables of diagnostic codes of malfunctions with the least numerical code and continue their viewing on the increasing.
Whether diagnostic codes of malfunctions as the valid codes of malfunction are identified?
See the suitable table of diagnostic codes of malfunctions
The step 6 see
98
Whether all symptoms are identified?
See the suitable table of diagnostic codes of malfunctions
The step 11 see
10
Distinguish knot at which the size of the consecutive data falls outside the limits a normal amount
Whether the knot is distinguished?
«Auxiliary diagnostic aids» see
-
11
1. Clear memory of the electronic block of management.
2. Whether check up all diagnostic codes of malfunctions are erased from memory ЭБУ.
3. Make road test.
4. Recheck on presence of diagnostic codes of malfunctions.
Repair is finished?
The system is perfectly in order
The step 12 see
12
1. Apply сканнер on other car.
2. Include ignition, without starting up the engine.
Whether reads сканнер the consecutive data?
The step 13 see
The step 16 see
13
Check up on breakage or short circuit in a wire between the plug 11 sockets ЭБУ and the plug of M of a socket of the data link.
Whether malfunction is found?
The step 14 see
The step 15 see
14
1. If necessary eliminate breakage or short circuit.
2. Connect сканнер to a data transmission socket.
3. Start up the engine.
Whether shows сканнер the consecutive data?
The system is perfectly in order
The step 15 see
15
1. Replace the electronic block of management.
2. Connect сканнер to a data transmission socket.
3. Start up the engine.
Whether shows сканнер the consecutive data?
The step 6 see
-
16
1. Replace сканнер.
2. Connect сканнер to a data transmission socket.
3. Include ignition, without starting up the engine.
Whether reads сканнер the consecutive data?
The step 5 see
-
   1 Check up for appropriate work a control lamp of malfunction. When ignition is included also the engine is not started up, the control lamp of malfunction should join on 4 with and then be switched off.
2 Nezagoranie of a control lamp of malfunction mean: in a chain of a control lamp of malfunction there is a malfunction or ЭБУ supervises this chain.
3 procedures a considerable quantity use сканнер for additional diagnostics; therefore the consecutive data should be accessible. If there is malfunction ЭБУ, ЭБУ will include a control lamp of malfunction, but cannot give out the consecutive data.
4 Despite the fact that what power consumption ЭБУ, a symptom «the Cranked shaft raises rotates, but the engine is not started up» can take place, because of malfunction in ЭБУ or in system.
5 This step isolate, if the complaint of the client to a control lamp of malfunction or to bad controllability without inclusion of a control lamp of malfunction. Diagnostic codes of malfunctions in this section in the list of correct diagnostic codes of malfunctions see. The wrong diagnostic code of malfunctions can be result faulty сканнера or ЭБУ.
6 Comparison of a real control system by the data with typical values is a fast check for definition of some parametres exceeding limits. The basic malfunctions of the engine (wrong adjustment of a thermal backlash of valves or vacuum leak) can essentially change gauge indications.
7 Installation сканнера will provide good grounding for ЭБУ and can hide a malfunction of controllability because of bad grounding.
8 If the true data exceeds the limiting established typical sizes, see the table «Diagnostics of symptoms» for maintenance of functional check of a suspected component or system.


Diagnostic aids
If the malfunction appearing periodically, is obvious, follow the following instruction.
Preliminary execute «Check of system of diagnostics» and full visual check. It will help to eliminate malfunction without the further check and will save time.
Check up:
Grounding of the electronic block of management on cleanliness, density of fastening and an appropriate arrangement;
Vacuum hoses on breaks, bends, flattening and appropriate connections;
Air leak in a place of fastening of throttle knot and a surface of consolidation of an inlet collector;
Ignition wires on a break, the rigidity, an appropriate arrangement and conductivity;
Wires on appropriate connection;
Wires on a jamming or breakage.
Do not use the table of diagnostic codes of malfunctions for correction of the malfunction appearing periodically. Malfunction should be present constantly for its detection.
Misuse of the table of diagnostic codes of malfunctions can become the reason of unnecessary replacement of parts.
The greatest malfunctions appearing periodically, are caused by faulty electric connections or faulty wires. Cautiously check up chains suspected of malfunction in a following order:
Unreliable connection of halves of electric sockets;
Plugs are not completely located in the socket case;
The wrong form of plugs or the damaged plugs. All plugs of a socket in a faulty chain should be checked accurately up, corrected or replaced for maintenance of appropriate contact;
Bad connection of the plug with a wire. In this case it is necessary to remove the plug from the socket case.
If at visual survey the cause of defect is not found out, the car should be operated with the connected voltmeter or сканнером to a suspected chain.
Inappropriate pressure or the inappropriate indication сканнера shows malfunction in a chain.
Fire of a control lamp of malfunction without diagnostic codes of malfunctions can occur for following reasons:
The hindrance of electric systems caused by the faulty relay, operated solenoid EBU or the switch;
Wrong installation of electric options — lanterns, sound systems or the security alarm system;
Wires of the control of ignition are near to wires of ignition, components of system of ignition and the generator;
Secondary wires of ignition are closed on weight;
The feeding wire of a control lamp of malfunction and-or the plug of diagnostic check are falteringly closed on weight;
Faltering loss of grounding in connections ЭБУ.
Some periodically arising malfunctions of controllability can be carried to bad quality of fuel.

Malfunction diagnostics «the Cranked shaft rotates, but the engine is not started up»

The prevention
At work with ignition wires on the working engine use only электрически the isolated flat-nose pliers for prevention of blow by a current.

Do not press or do not jam nylon fuel hoses. Because of damage of hoses there can be a leak of fuel and to become a cause of the fire and receptions of traumas.
Malfunction diagnostics «the Cranked shaft rotates, but the engine is not started up» resulted in tab. 3.11.

Table 3.11     malfunction Diagnostics «the Cranked shaft rotates, but the engine is not started up»
Step
Performed works
Size
Yes
No
1
Whether diagnostics system is checked up?
-
The step 2 see
«Check of system of diagnostics» see
2
Turn a cranked shaft.
Whether the engine was got, whether it continues to work?
-
The system is perfectly in order
Step З see
31
Check up a compression in cylinders.
The received size of a compression the established size corresponds or exceeds?
1250 кПа
The step 7 see
The step 4 see
4
Check up correctness of installation and adjustment of a gear belt.
Whether installation of a gear belt is correctly adjusted?
-
The step 6 see
The step 5 see
5
Adjust or replace a gear belt as required.
Repair is finished?
-
The step 2 see
-
6
Adjust internal damage of the engine as required
Repair is finished?

The step 2 see

7
Check up the main relay (connected to the fuel pump).
Whether malfunction is found?

The step 8 see
The step 9 see
8
Replace the main relay.
Repair is finished?

The step 2 see

92
Check up spark presence on all wires of ignition at rotation of a cranked shaft of the engine.
Whether there is a spark on all wires of ignition?

The step 28 see
The step 10 see
10
1. Measure resistance on ignition wires.
2. Replace ignition wires, with resistance more the than established size.
3. Check up on spark presence on all wires of ignition.
Whether there is a spark on all wires of ignition?
5 clod
The step 2 see
The step 11 see
11
Check up on breakage or short circuit in a wire between the plug of 1 socket of the optical gauge and grounding (weight).
Whether malfunction is found?
-
The step 14 see
The step 12 see
12
Check up on breakage or short circuit in a wire between the plug 3 sockets of the optical gauge and the plug 33 sockets ЭБУ.
Whether malfunction is found?

The step 14 see
The step 13 see
13
Check up on breakage or short circuit in a wire between the plug 2 sockets of the optical gauge and the ignition switch.
Whether malfunction is found?

The step 14 see
The step 27 see
14
Repair wires.
Repair is finished?

The step 15 see

15
1. Disconnect a socket of the coil of ignition for prevention of start-up of the engine.
2. Measure pressure in the plug 33 sockets ЭБУ and weight, probing socket ЭБУ. Whether the measured coincides
Size of pressure with the established size?
0 In or 5 In at the included ignition, 2 In in the course of rotation of a cranked shaft
The step 17 see
The step 16 see
16
Replace the optical gauge.
Repair is finished?
-
The step 2 see
-
17
1. Switch off ignition.
2. Disconnect an electric socket of the coil of ignition.
3. Connect a control lamp between the plug 2 sockets of the coil of ignition and weight.
4. Include ignition, without starting the engine.
Whether the control lamp has joined?
-
The step 18 see
The step 19 see
18
Connect a control lamp between the plug of 1 socket of the coil of ignition and "the positive" plug of the storage battery.
Whether the control lamp lights up at rotation of a cranked shaft?
-
The step 22 see
The step 20 see
193
Check up on breakage in a wire between the switch of ignition and the plug 2 sockets of the coil of ignition.
Whether malfunction is found?
-
The step 21 see
-
20
Check up on breakage in a wire from the ignition coil to weight.
Whether malfunction is found?
-
The step 21 see
-
21
1. Repair wires as it is necessary.
2. Connect a socket of the coil of ignition.
3. Check up spark presence on all wires of ignition.
Whether there is a spark on all wires of ignition?
-
The step 2 see
The step 22 see
22
1. Switch off ignition.
2. Disconnect a socket of the coil of ignition.
3. Rotating a cranked shaft, check up pressure on the plug of 1 socket of the coil of ignition.
Whether there are fluctuations (deviation) of pressure within the established size?
0,2-2,0 IN
The step 23 see
The step 24 see
23
Rotating a cranked shaft, measure pressure on the plug 28 sockets ЭБУ.
Whether there are fluctuations (deviation) of pressure within the established size?
0,2-2,0 IN
The step 26 see
The step 25 see
24
Check up on breakage in a wire from the plug of 1 socket of the coil of ignition to the plug 28 sockets ЭБУ.
Whether malfunction is found?
-
The step 25 see
The step 27 see
25
1. Repair wires.
2. Connect a socket of the coil of ignition.
3. Check up on spark presence on all wires of ignition.
Whether there is a spark on all wires of ignition?
-
The step 2 see
The step 26 see
26
Replace the ignition coil.
Repair is finished?
-
The step 2 see
-
27
Replace the electronic block of management.
Repair is finished?
-
The step 2 see
-
28
1. Switch off ignition.
2. Connect a measuring instrument of pressure of fuel.
3. Turn a cranked shaft.
Whether there is any pressure?
-
The step 31 see
The step 29 see
29
1. Switch off ignition.
2. Disconnect an electric socket of the fuel pump.
3. Connect a control lamp between plugs 2 and 3 sockets of the fuel pump.
4. Include ignition, without starting up the engine.
5. At the included ignition (the engine is not started up), the control lamp should light up at a fixed time.
Whether the control bulb burns?
2 with
The step 30 see
The step 32 see
30
Replace the fuel pump.
Repair is finished?
-
The step 2 see
-
31
Whether there is in limits of the established size a size of pressure of fuel?
380 кПа
The step 34 see
The step 32 see
32
1. Check up the fuel filter on a contamination.
2. Check up fuel lines on bends or narrowings.
Whether malfunction is found?
-
The step 33 see
The step 34 see
33
1. Replace the fuel filter and-or fuel lines.
2. Connect a measuring instrument of pressure of fuel.
3. Turn a cranked shaft.
Whether there is a size of pressure of fuel within the established size?
380 кПа
The step 2 see
The step 34 see
34
Check up fuel on pollution.
Whether fuel is polluted?
-
The step 35 see
The step 36 see
354
1. Merge the polluted fuel from a fuel tank.
2. Clean a fuel tank.
Repair is finished?
-
The step 2 see

36
1. Remove the fuel pump in gathering from a fuel tank.
2. Check up on narrowing топливоподающую a tube of the fuel pump and connecting hoses on pollution.
3. Check up the fuel filter located in a fuel tank on narrowing.
Whether malfunction is found?
-
The step 37 see
The step 38 see
37
Replace топливоподающую a tube, the filter located in a fuel tank, and-or connecting hoses.
Repair is finished?
-
The step 2 see
-
38
1. Switch off ignition.
2. Disconnect an electric socket of the fuel pump.
3. Connect a control lamp between the plug 3 sockets of the fuel pump and weight.
4. Include ignition, without starting up the engine.
2 with
The step 39 see
The step 40 see

5. At the included ignition (the engine does not work) the control lamp should burn established time. Whether the control bulb burns?



39
Eliminate wire breakage between the plug 2 sockets of the fuel pump and weight.
Repair is finished?
-
The step 2 see
-
40
1. Switch off ignition.
2. Disconnect the main relay.
3. Connect a control lamp between the plug 86 sockets of the main relay and weight.
4. Include ignition, without starting up the engine.
Whether the control lamp burns?
-
The step 41 see
The step 46 see
41
1. Switch off ignition.
2. Connect a control lamp between the plug 86 sockets of the main relay and "the positive" plug of the storage battery.
3. Include ignition, without starting up the engine.
4. At the included ignition (the engine does not work) the control lamp should burn established time.
Whether the control lamp burns?
2 with
The step 42 see
The step 47 see
42
1. Switch off ignition.
2. Connect a control lamp between the plug 30 sockets of the main relay and weight.
Whether the control bulb burns?
-
The step 43 see
The step 49 see
43
1. Switch off ignition.
2. Check up a wire between the plug 87 sockets of the main relay and the plug 3 sockets of the fuel pump on breakage or short circuit on weight.
Whether malfunction is found?
-
The step 44 see
The step 45 see
44
Eliminate breakage of a wire or short circuit on weight of a wire between the plug 87 sockets of the main relay and the plug 3 sockets of the fuel pump.
Repair is finished?
-
The step 2 see
-
45
Replace the main relay.
Repair is finished?
-
The step 2 see
-
46
1. Check up safety lock Ef4.
2. Check up on breakage in a wire between the switch of ignition and the plug 86 sockets of the main relay.
Whether malfunction is found?
-
The step 57 see
-
47
Check up a wire between the plug 85 sockets of the main relay and the plug 14 sockets ЭБУ on breakage.
Whether malfunction is found?
-
The step 48 see
The step 50 see
48
Repair wires between the plug 85 sockets of the main relay and the plug 14 sockets ЭБУ.
Repair is finished?
-
The step 2 see
-
49
Repair wires between the plug 30 sockets of the main relay and safety lock Ef19.
Repair is finished?
-
The step 2 see
-
50
1. Switch off ignition.
2. Disconnect sockets of wires from fuel atomizers.
3. Include ignition, without starting up the engine.
4. Connect a control bulb between the plug 2 sockets of a wire of a fuel atomizer and weight.
5. Repeat point 4 for each of the remained atomizers.
Whether the control bulb on all fuel atomizers for 2 seconds lights up?
-
The step 51 see
The step 54 see
51
1. Switch off ignition.
2. Connect a control lamp between the plug of 1 socket of a wire of a fuel atomizer and "the positive" plug of the storage battery.
3. Turn a cranked shaft.
4. Repeat points 2 and 3 for all remained atomizers.
Whether the control lamp on all fuel atomizers flashes?
-
The step 52 see
The step 55 see
52
Measure resistance on each fuel atomizer.
Whether there is a size of resistance within the established size (resistance will slightly increase at heats)?
13,75-15,25 Ohm
The system is perfectly in order
The step 53 see
53
Replace the fuel atomizers which size of resistance fall outside the limits the established size.
Repair is finished?
-
The step 2 see
-
54
Eliminate a wire breakage between the plug 2 sockets of electroconducting of the fuel pump and the plug 2 sockets С101 of electroconducting of the engine.
Repair is finished?
-
The step 2 see
-
55
1. Check up on a wire breakage between the plug of 1 socket of electroconducting of the fuel pump and the plug 30 sockets ЭБУ for the first fuel atomizer.
2. Check up on a wire breakage between the plug of 1 socket of electroconducting of the fuel pump and the plug of 1 socket ЭБУ for the second fuel atomizer.



55
3. Check up on a wire breakage between the plug of 1 socket of electroconducting of the fuel pump and the plug 4 sockets ЭБУ for the third fuel atomizer.
Whether malfunction is found?
-
The step 56 see
The step 58 see
56
Eliminate breakage of conducting of fuel atomizers.
Repair is finished?
-
The step 2 see
-
57
Replace a safety lock or repair conducting as it is necessary.
Repair is finished?
-
The step 2 see
-
585
1. Check up safety lock Ef19.
2. Check up on a wire breakage between chains from the plug 2 for each of three fuel atomizers and the ignition switch.
Whether malfunction is found?
-
The step 57 see
The step 27 see
1 Checking a compression, it is possible to define mechanical serviceability of the engine.
2 it is very important to check up spark presence in all wires of ignition. If the spark is on all three plugs of the coil of ignition, the optical gauge is perfectly in order.
3 At check of target signals of the moment of ignition ЭБУ, we recommend to use an oscillograph to see changes of signals of pressure. At measurement by the voltmeter of these target signals, alternating malfunctions can take place, but they cannot be found out the voltmeter.
4 This step checks on appropriate control ЭБУ of a chain of the fuel pump.
5 This step checks on the signal of grounding provided ЭБУ for management with fuel atomizers. If at проворачивании a cranked shaft of the engine grounding is absent also fuel atomizers as it should be, ЭБУ is faulty.

Malfunction diagnostics
«The control lamp of malfunction» does not burn
When ignition is included, and the engine is not started up, the control lamp of malfunction burns 4 with, then dies away. Pressure of the storage battery is delivered directly to a control lamp of malfunction. ЭБУ supervises a control lamp of malfunction and includes it, providing grounding through a wire of the plug 43 sockets ЭБУ to a control lamp of malfunction.
If the engine works well, check up a control lamp of malfunction.
If the cranked shaft rotates, but the engine is not started up, check up on breakage a safety lock and bad connections ЭБУ.
Especially check up ЭБУ on presence of pressure of ignition and a food by the storage battery, including clearing and fastening of connections of grounding ЭБУ.
Malfunction diagnostics «does not burn a control lamp of malfunction» is resulted in tab. 3.12.

Table 3.12     malfunction Diagnostics «does not burn a control lamp of malfunction»
Step
Performed works
Size
Yes
No
1
Start up the engine.
Whether the engine is started up?
-
The step 2 see
The step 7 see
2
1. Switch off ignition.
2. Disconnect a socket of the electronic block of management.
3. Include ignition, without starting up the engine.
4. Connect a control lamp between the plug 43 sockets ЭБУ and weight.
Whether the control lamp burns?
-
The step 13 see
The step 3 see
3
Check up safety lock F1.
The safety lock is perfectly in order?
-
The step 4 see
The step 14 see
41
The voltmeter check up pressure presence in plugs of a control lamp of malfunction.
Whether there corresponds the measured size of pressure to the established limits?
11-14 IN
The step 5 see
The step 15 see
5
Check up a control lamp of malfunction.
The control lamp of malfunction is perfectly in order?

The step 6 see
The step 16 see
6
Check up on breakage or short circuit on "the positive" plug of the storage battery in a wire between the plug 43 sockets ЭБУ and a control lamp of malfunction.
Whether malfunction is found?

The step 17 see
The step 12 see
7
Check up safety lock Ef4/Ef19.
Whether malfunction is found?

The step 18 see
The step 8 see
82
1. Switch off ignition.
2. Disconnect socket ЭБУ.
3. Connect a control lamp between the plug 32 sockets ЭБУ and weight.
Whether the control bulb burns?

The step 9 see
The step 19 see
93
1. Switch off ignition.
2. Connect a control lamp between the plug 24 sockets ЭБУ and weight.
3. Include ignition, without starting up the engine.
Whether the control lamp burns?

The step 10 see
The step 20 see
10
Check up plugs 24 and 32 sockets ЭБУ on damage or bad connection.
Whether malfunction is found?

The step 11 see
The step 13 see
11
Repair plugs of socket ЭБУ as it is necessary.
Repair is finished?

«Check of system of diagnostics» see
-
12
Check up on damage or bad connection of the plug 43 sockets ЭБУ.
Whether malfunction is found?

The step 11 see
The step 13 see
13
Check up plugs 2 and 3 sockets ЭБУ on grounding.
Grounding is perfectly in order?

The step 22 see
The step 21 see
14
1. Switch off ignition.
2. Replace safety lock F1.
3. Include ignition, without starting up the engine.
Whether the control lamp of malfunction burns?

«Check of system of diagnostics» see
The step 16 see
15
Eliminate breakage in a wire of a food of a control lamp of malfunction.
Repair is finished?

«Check of system of diagnostics» see
-
16
Replace a lamp of a signalling device of malfunction of systems of the engine.
Repair is finished?

«Check of system of diagnostics» see

17
Repair wires between the plug 43 sockets ЭБУ and a control lamp of malfunction.
Repair is finished?

«Check of system of diagnostics» see

18
1. Switch off ignition.
2. Replace safety lock Ef4 and-or Ef19.

«Check of system of diagnostics» see

18
3. Include ignition, without starting up the engine.
Whether the control lamp of malfunction burns?

«Check of system of diagnostics» see

19
Repair wires between the plug 32 sockets ЭБУ and safety lock Ef19.
Repair is finished?

«Check of system of diagnostics» see

20
Repair wires between the plug 24 sockets ЭБУ and safety lock Ef4.
Repair is finished?

«Check of system of diagnostics» see

21
Repair wires between the plug 2 and / or 3 sockets ЭБУ and weight.
Repair is finished?

«Check of system of diagnostics» see

224
Replace ЭБУ.
Repair is finished?

«Check of system of diagnostics» see

1 This step checks presence of pressure of the storage battery in a cartridge of a control lamp of malfunction of a combination of devices.
2 This step checks presence of a food of the storage battery in ЭБУ.
3 This step checks presence of pressure of ignition in ЭБУ.
4 In this point conducting of a control lamp of malfunction is perfectly in order. Malfunction is in ЭБУ.

Malfunction diagnostics «does not blink a control lamp of malfunction»
When ignition is included, and the engine is not started up, the control lamp of malfunction burns 4 with, then dies away. Pressure of the storage battery moves directly on a control lamp of malfunction. ЭБУ supervises a control lamp of malfunction and includes it, providing grounding through a wire of the plug 43 sockets ЭБУ to a control lamp of malfunction.
At grounding of plugs And and From a data transmission socket the control lamp of malfunction should flash at each diagnostic code of the malfunction, kept in memory ЭБУ. Constant burning of a control lamp of malfunction means short circuit on weight of the plug 43 sockets ЭБУ.
If the engine works normally, check up a lamp of a signalling device of malfunction of systems of the engine.
If the cranked shaft rotates, but the engine is not started up, check up on safety lock breakage, bad connections ЭБУ.
Especially check up on ignition ЭБУ and a food of the storage battery, including clearing and fastening of connections of grounding ЭБУ.
Malfunction diagnostics «does not blink a control lamp of malfunction» is resulted in tab. 3.13.

Table 3.13     malfunction Diagnostics «does not blink a control lamp of malfunction»
Step
Performed works
Yes
No
1
Include ignition, without starting the engine.
Whether the control lamp of malfunction burns?
The step 2 see
See «the lamp of the notification of malfunction does not burn»
2
1. Switch off ignition.
2. Close plugs F and From a data transmission socket.
3. Include ignition, without starting up the engine.
Whether the control lamp of malfunction flashes at a diagnostic code of malfunction if it is kept in memory?
«Check of system of diagnostics» see
Step З see
31
3. Include ignition, without starting up the engine.
Whether the control lamp of malfunction burns?
The step 4 see
The step 5 see
4
Repair short circuit on weight in a wire between the plug 43 sockets ЭБУ and a lamp of the notification of malfunction.
Repair is finished?
«Check of system of diagnostics» see

5
1. Switch off ignition.
2. Repeatedly connect socket ЭБУ.
3. Include ignition.
4. Probe the plug 13 sockets ЭБУ the control lamp connected to weight.
Whether the control lamp of malfunction flashes at a diagnostic code of malfunction if it is kept in memory?
The step 6 see
The step 8 see
6
Check up on wire breakage between the plug 13 sockets ЭБУ and the plug From a data transmission socket.
Whether malfunction is found?
The step 10 see
The step 7 see
7
Eliminate wire breakage between the plug And a socket of data transmission and weight.
Repair is finished?
«Check of system of diagnostics» see

8
Check up on damage or bad joining of the plug 13 sockets ЭБУ.
Whether malfunction is found?
The step 9 see
The step 11 see
9
Repair damage or bad contact of the plug 13 sockets ЭБУ.
Repair is finished?
«Check of system of diagnostics» see

10
Eliminate wire breakage between the plug 13 sockets ЭБУ and the plug From a data transmission socket.
Repair is finished?
«Check of system of diagnostics» see

11
Replace ЭБУ.
Repair is finished?
«Check of system of diagnostics» see

1 If the control lamp of malfunction will join, when socket ЭБУ is disconnected, 43 sockets ЭБУ will close a wire of the plug on weight.

Diagnostics of check of pressure in fuel system
The fuel pump established in a fuel tank together with the index of level of fuel, will work until the cranked shaft or the engine rotates works and ЭБУ will receive signals from the optical gauge in the ignition distributor. If such signals are absent, ЭБУ will switch off the fuel pump during 2 with the ambassador of inclusion of ignition or 2 with the ambassador of a stop of the engine. The fuel pump submits fuel to a fuel stage and fuel atomizers where pressure of fuel system is supervised by a regulator of pressure of fuel from 380 кПа. Surplus of fuel comes back in a tank.
Order of dump of pressure in fuel system:
Uncover the fuel pump;
Remove a socket of electroconducting from the fuel pump established under a pillow of a back seat;
Start up the engine; allow to it to work to a stop caused by absence of fuel;
Turn a cranked shaft in addition during 10 with.

The prevention
The fuel system is under pressure. To avoid leak of fuel and risk of reception of damage or a burn, remove pressure in fuel system to a detachment of fuel tubes and hoses.

Do not press or do not jam fuel hoses. Because of damage of hoses there can be a leak of fuel which can become a cause of the fire and receptions of traumas.

Fig. 3.169. The scheme of fuel system: 1 — an atomizer; 2 — a fuel framework; 3 — a pressure manometre in fuel system; 4 — a fuel tank; 5 filter; 6 — the fuel pump; 7 — a pressure regulator




The scheme of fuel system is resulted on fig. 3.169, and diagnostics of check of pressure in fuel system in tab. 3.14.

Table 3.14   Diagnostics of check of pressure in fuel system
Step
Performed works
Size
Yes
No
1
1. Remove pressure in fuel system.
2. Establish a measuring instrument of pressure of fuel.
3. Include ignition, without starting up the engine.
Whether there is a measured size of pressure of fuel within the established size and whether it remains steady?
380 кПа
The system is perfectly in order
The step 2 see
2
1. Remove pressure in fuel system.
2. Establish a measuring instrument of pressure of fuel.
3. Include ignition, without starting up the engine.
4. Whether there is a measured size of pressure of fuel within the established size, whether it remains steady?
380 кПа
The step 13 see
The step 3 see
3
Check up fuel lines (a fuel highway) on leak.
Whether malfunction is found?
-
The step 4 see
The step 5 see
4
1. Replace a fuel highway as it is necessary.
2. Establish a measuring instrument of pressure of fuel.
3. Include ignition, without starting up the engine.
Whether there is a measured size of pressure of fuel within the established size and whether it remains steady?
380 кПа
The system is perfectly in order
-
5
1. Remove the fuel pump in gathering.
2. Check up connecting tubes and hoses of the fuel pump on leak presence, when the fuel pump under pressure.
Whether malfunction is found?
-
The step 6 see
The step 7 see
6
1. Tighten or replace connecting tubes of the fuel pump as it is necessary.
2. Establish a measuring instrument of pressure of fuel.
3. Include ignition, without starting up the engine.
Whether there is a measured size of pressure of fuel within the established size and whether it remains steady?
380 кПа
The system is perfectly in order
The step 8 see
71
Check up a tube of giving of fuel on leak presence, when fuel system under pressure.
Whether malfunction is found?
-
The step 8 see
The step 9 see
8
1. Replace a regulator of pressure of fuel.
2. Establish a measuring instrument of pressure of fuel.
3. Include ignition, without starting up the engine.
Whether there is a measured size of pressure of fuel within the established size and whether it remains steady?
380 кПа
The system is perfectly in order
-
9
Check up a tube of return of fuel on leak presence when the fuel system is under pressure.
Whether malfunction is found?
-
The step 10 see
The step 11 see
10
1. Replace the fuel pump in gathering.
2. Establish a measuring instrument of pressure of fuel.
3. Include ignition, without starting up the engine.
Whether there is a measured size of pressure of fuel within the established size and whether it remains steady?
380 кПа
The system is perfectly in order
-
112
1. Remove a fuel stage and fuel atomizers as it is necessary.
2. Check up on leak presence all fuel atomizers, when fuel system under pressure.
Whether malfunction is found?
-
The step 12 see
-
12
1. Replace the fuel atomizers having leak.
2. Establish a measuring instrument of fuel pressure.
3. Include ignition, without starting up the engine.
Whether there is a measured size of pressure of fuel within the established size and whether it remains steady?
380 кПа
The system is perfectly in order
-
13
1. Replace a regulator of pressure of fuel.
2. Start up the engine.
3. Allow to the engine to work empty.
Whether there is a measured size of pressure of fuel within the established size and whether it remains steady?
380 кПа
The system is perfectly in order
-
1 If fuel flows down back through a return tube, the regulator of pressure of fuel is faulty.
2 Others often meeting symptom - leak of fuel from fuel atomizers. Therefore the engine is difficultly started. Fuel leak through an atomizer can become the reason заливания.


Check of an electric chain of the main relay
When ignition is included, ЭБУ includes the main relay and puts in action the fuel pump in a fuel tank. The fuel pump will work until the cranked shaft will rotate or to work the engine and ЭБУ will receive signals from the optical gauge.
If such signals are absent, ЭБУ stops work of the fuel pump during 2 with the ambassador of inclusion of ignition.
Alternating malfunction can be caused bad connection, damage of isolation of a wire or breakage of a wire in isolation.
Diagnostics of check of an electric chain of the main relay is resulted in tab. 3.15.

Table 3.15    Diagnostics of check of an electric chain of the main relay

Step
Performed works
Size
Yes
No
1
1. Switch off ignition on 10 with.
2. Include ignition, without starting up the engine.
3. Listen to a sound of work of the fuel pump in a fuel tank.
Whether the fuel pump the established time works?
2 with
The system is perfectly in order
The step 2 see
2
1. Switch off ignition.
2. Disconnect the main relay.
3. Connect a control lamp between the plug 86 sockets of the main relay and weight.
4. Include ignition, without starting up the engine.
Whether the control bulb burns?
-
Step З see
The step 8 see
31
1. Switch off ignition.
2. Connect a control lamp between the plug 85 sockets of the main relay and "the positive" plug of the storage battery.
3. Include ignition, without starting up the engine.
4. At the included ignition (the engine does not work) the control lamp should burn established time.
Whether the control bulb burns?
2 with
The step 4 see
The step 9 see
4
1. Switch off ignition.
2. Connect a control bulb between the plug 30 sockets of the main relay and weight.
Whether the control bulb burns?
-
The step 5 see
The step 11 see
5
Check up on breakage or short circuit on weight in a wire between the plug 87 sockets of the main relay and the plug 3 sockets of the fuel pump.
Whether malfunction is found?
-
The step 6 see
The step 7 see
6
1. Repair wires between the plug 87 sockets of the main relay and the plug 3 sockets of the fuel pump.
2. Establish the main relay.
3. Switch off ignition on 10 with.
4. Include ignition, without starting up the engine.
Whether the fuel pump the established time works?
2 with
The system is perfectly in order
-
72
1. Replace the relay of the fuel pump.
2. Switch off ignition on 10 with.
3. Include ignition, without starting up the engine.
Whether the fuel pump certain time works?
2 with
The system is perfectly in order
-
83
Check up on breakage a wire between the plug 86 sockets of the main relay and the ignition switch.
Whether malfunction is found?
-
The step 13 see
-
94
Check up on breakage a wire between the plug 85 sockets of the main relay and the plug 14 sockets ЭБУ.
Whether malfunction is found?
-
The step 10 see
The step 12 see
10
1. Replace safety lock Ef4 or make repair of breakage of a wire between the plug 85 sockets of the main relay and клеммой14 socket ЭБУ.
2. Establish the main relay.
3. Switch off ignition on 10 with.
4. Include ignition, without starting up the engine.
Whether the fuel pump certain time works?
2 with
The system is perfectly in order
-
11
1. Replace safety lock Ef19 or make repair of breakage of a wire between the plug 30 sockets of the main relay and safety lock Ef19.
2. Establish the main relay.
2 with
The system is perfectly in order
-
11
3. Switch off ignition on 10 with.
4. Include ignition, without starting up the engine.
Whether the fuel pump certain time works?
2 with
The system is perfectly in order
-
12
1. Replace ЭБУ.
2. Switch off ignition on 10 with.
3. Include ignition, without starting up the engine.
Whether the fuel pump certain time works?
2 with
The system is perfectly in order
-
13
1. Replace safety lock Ef4 or eliminate wire breakage between the plug 86 sockets of the main relay the ignition switch.
2. Establish the main relay.
3. Switch off ignition on 10 with.
4. Include ignition, without starting up the engine.
Whether the fuel pump certain time works?
2 with
The system is perfectly in order
-
1        This step checks maintenance of grounding of the main relay with the electronic block of management.
2        Having convinced that with conducting everything is all right; using a step 2 through a step 6, it is possible to establish malfunction of the main relay.
3        If in the plug 86 sockets of the main relay are not present pressure, safety lock Ef4 of the block of safety locks of the engine means has fused, conducting between the main relay and the ignition switch is torn off.
4        If ЭБУ does not earth the main relay, means it is faulty ЭБУ and-or conducting between ЭБУ and the main relay is faulty.

Check of absolute pressure in an inlet collector
The gauge of absolute pressure measures changes of pressure in an inlet collector in an inlet collector. This pressure depends on engine loading (depression in an inlet collector) and changes of frequency of rotation of the engine. The gauge of absolute pressure in an inlet collector transforms these changes to target signals of pressure. ЭБУ sends 5 To basic pressure in the gauge of absolute pressure in an inlet collector. With change of pressure in an inlet collector target signals of pressure vary. Low signals of pressure (high depression) from 1,0 to 1,5 In take place at frequency of rotation of idling. High signals of pressure (low depression) from 4,5 to 5,0 In take place at full opening throttle заслонки. Under certain conditions the gauge of absolute pressure in an inlet collector also is used for measurement of atmospheric pressure.
It allows ЭБУ to regulate car height above sea level. ЭБУ uses the gauge of absolute pressure in an inlet collector for giving of fuel and change of the moment of ignition.
Diagnostics of check of absolute pressure in an inlet collector is resulted in table 3.16.

Table 3.16   Diagnostics of check of absolute pressure in an inlet collector
Step
Performed works
Size
Yes
No
1
1. Switch off ignition.
2. Connect сканнер to a data transmission socket.
3. Include ignition, without starting up the engine.
4. Compare indications of pressure of the gauge of absolute pressure in an inlet collector on the scanner to similar indications on the serviceable car.
Whether the difference size between two pressure of the established size is less?
0,4 IN
The step 2 see
The step 5 see
21
1. Switch off ignition.
2. Connect сканнер to a data transmission socket.
3. Disconnect a vacuum line of the gauge of absolute pressure in an inlet collector.
4. Connect the manual vacuum pump to the gauge of absolute pressure in an inlet collector.
1,5 IN
The system is perfectly in order
Step З see
21
5. Include ignition, without starting up the engine.
6. Fix size of pressure of the gauge of absolute pressure in an inlet collector.
7. Put 34 кПа vacuum to the gauge of absolute pressure in an inlet collector and fix pressure change.
Whether the difference size between two pressure of the established size exceeds?



3
Check up plugs of a socket of the gauge of absolute pressure in an inlet collector.
Whether malfunction is found?
-
The step 4 see
The step 5 see
4
Make repair of plugs of a socket of the gauge of absolute pressure in an inlet collector.
Repair is finished?
-
The system is perfectly in order
-
5
Replace the gauge of absolute pressure in an inlet collector.
Repair is finished?
-
The system is perfectly in order
-

Check of the monitoring system of idling
ЭБУ managements operates frequency of rotation of idling of the engine by means of the valve of the control of idling. For increase in frequency of rotation of idling ЭБУ moves the core of the valve of the control of idling from a saddle, allowing to pass большему to quantity of air through a throttle aperture. For reduction of frequency of rotation of idling ЭБУ moves the core of the valve of the control of idling in a direction to a saddle, reducing passage of a stream of air. Сканнер reads commands ЭБУ to the valve of the control of idling in impulses. High impulses mean passage большего quantities of air (high frequency of rotation of idling). Low impulses mean passage of smaller quantity of air (low frequency of rotation of idling).
If frequency of rotation of idling very high, stop the engine. Completely open the valve of the control of idling with a tester of the control of idling. Start up the engine. If frequency of rotation of idling exceeds 950 mines-1, find out and eliminate vacuum leak. Check up connections throttle заслонки or correctness of installation of idling.
Each time when disconnect or replace the plug of the storage battery, socket ЭБУ or safety lock Ef19 (it is more than on 10), it is necessary to execute the following procedure of installation of idling:
Turn a cranked shaft of the engine and switch off ignition (the engine is not started up). Engine start-up can occur, but it has no value;
Start up the engine. Procedure of installation of idling is finished.
Diagnostics of check of the monitoring system of idling is resulted in tab. 3.17.

Table 3.17    Diagnostics of check of the monitoring system of idling
Step
Performed works
Size
Yes
No
1
Whether check of system of diagnostics has been executed?
-
The step 2 see
«Check of system of diagnostics» see
21
1. Switch off ignition.
2. Connect a drive of the control of idling to the valve of the control of idling.
3. Connect сканнер to a data transmission socket.
4. Start up the engine.
5. With a drive of the control of idling take away and involve the valve of the control of idling. Frequency of rotation of the engine should raise and go down depending on a cycle of work of the valve of the control of idling.
Whether frequency of rotation of the engine changes?
-
The step 5 see
The step 3 see
3
1. Remove the valve of the control of idling.
2. Check up channels of the valve of the control of idling on narrowing.
Whether malfunction is found?
-
The step 4 see
The sphere 19 see
4
Clean channels of the valve of the control of idling.
Repair is finished?
-
The system is perfectly in order
-
52
1. Switch off ignition.
2. Start up the engine.
3. Using a drive of the control of idling, delay and involve the valve of the control of idling. Frequency of rotation of the engine should raise and go down depending on a cycle of work of the valve of the control of idling.
Whether frequency of rotation of the engine within the established size smoothly changes at each movement of a drive of the control of idling?
950 mines-1
The step 6 see
The step 3 see
63
1. Switch off ignition.
2. Connect a drive of the control of idling to the valve of the control of idling.
3. Establish the light-emitting diode indicator of the control of idling to a socket of the valve of the control of idling.
4. Start up the engine.
5. Will perform a cycle of work of a drive of the control of idling.
-
The step 7 see
The step 9 see

6. Observe of the light-emitting diode indicator of a drive of the control of idling.
Whether light up periodically red light with green, but do not die away at change of frequency of rotation of the engine?



7
1. Measure resistance between plugs And and In the valve of the control of idling.
2. Measure resistance between plugs With and D the valve of the control of idling.
Whether shows an ohmmeter the established size?
40-80 Ohm
The step 8 see
The step 19 see
8
1. Measure resistance between plugs And and From the valve of the control of idling.
2. Measure resistance between plugs And and D the valve of the control of idling.
Whether shows an ohmmeter the established size?
-
«Auxiliary diagnostic aids» see
The step 19 see
9
Check up plugs of a socket of the valve of the control of idling.
Whether malfunction is found?
-
The step 10 see
The step 11 see
10
Repair or replace plugs of a socket of the valve of the control of idling as it is necessary
Repair is finished?
-
The system is perfectly in order
-
11
Check up on breakage or short circuit in a wire between the plug In a socket of the valve of the control of idling and the plug 9 sockets ЭБУ.
Whether malfunction is found?
-
The step 15 see
The step 12 see
12
Check up on breakage or short circuit in a wire between the plug And a socket of the valve of the control of idling and the plug 35 sockets ЭБУ.
Whether malfunction is found?
-
The step 15 see
The step 13 see
13
Check up on breakage or short circuit in a wire between plug D of a socket of the valve of the control of idling and the plug 36 sockets ЭБУ.
Whether malfunction is found?
-
The step 15 see
The step 14 see
14
Check up on breakage or short circuit in a wire between the plug From a socket of the valve of the control of idling and the plug 40 sockets ЭБУ.
Whether malfunction is found?
-
The step 15 see
The step 16 see
15
Repair wires as it is necessary.
Repair is finished?
-
The system is perfectly in order
The step 18 see
16
Check up plugs of socket ЭБУ.
Whether malfunction is found?
-
The step 17 see
-
17
Repair plugs of socket ЭБУ as it is necessary.
Repair is finished?
-
The system is perfectly in order
-
18
Replace ЭБУ.
Repair is finished?
-
The system is perfectly in order
-
19
Replace the valve of the control of idling.
Repair is finished?
-
The system is perfectly in order
-
1     Valve of the control of idling nestles on a saddle and is taken away from a saddle by a drive of the control of idling (IAC driver). Movement of the valve of the control of idling copes change of frequency of rotation of the engine. If changes of frequency of rotation of the engine does not occur, remove the valve from throttle knot and test. Connect a drive of the control of idling to the removed valve of the control of idling and include ignition. The engine do not start up.
2     This step checks quality of movement of the valve of the control of idling in a step 2. Full opening (extending) the valve of the control of idling can lead to an engine stop, but it has no value.
3     Step 2 and a step 5 supervise appropriate work of the valve of the control of idling, and check a chain of the control of idling on malfunction ЭБУ or electroconductings.

Check of system of ignition
In ignition system the optical gauge established in the distributor of ignition is used. It is located close to a disk with apertures which is a detail of the distributor of ignition. The optical gauge sends basic signals about position of the piston in the first cylinder and frequency of rotation of the engine in ЭБУ which then includes the ignition coil.
Diagnostics of check of system of ignition is resulted in tab. 3.18.

Table 3.18   Diagnostics of check of system of ignition
Step
Performed works
Size
Yes
No
1
1. Turn out spark plugs.
2. Check up candles on a moisture, a break, deterioration, a wrong backlash, обгорание electrodes and-or a thick deposit.
3. Replace spark plugs if it is necessary.
Repair is finished?
-
The system is perfectly in order
The step 2 see
21
Check up on spark presence on all wires of ignition at rotation of a cranked shaft.
Whether there is a spark on all wires of ignition?
-
The system is perfectly in order
Step З see
3
1. Measure resistance in ignition wires.
2. Replace ignition wires on which the resistance size exceeds the established size.
3. Check up on spark presence on all wires of ignition.
Whether there is a spark on all wires of ignition?
5 clod
The system is perfectly in order
The step 4 see
4
Whether there is a spark at least at one wire of ignition, but not in all wires?
-
The step 5 see
The step 11 see
52
1. Switch off ignition.
2. Disconnect a socket of the coil of ignition.
3. At rotation of a cranked shaft, measure pressure on the plug of 1 socket of the coil of ignition.
Whether there is in limits of the established size a size of a deviation of pressure?
0,2-2,0 IN
The step 6 see
The step 7 see
63
At rotation of a cranked shaft measure pressure on the plug 2 sockets of the coil of ignition.
Whether there is in limits of the established size a size of a deviation of pressure?
10-12 IN
The step 9 see
The step 8 see
7
Check up on breakage in a wire from the plug of 1 socket of the coil of ignition to the plug 28 ЭБУ.
Whether malfunction is found?
-
The step 8 see
The step 10 see
8
1. Repair conducting as it is necessary.
2. Connect a socket of the coil of ignition.
3. Check up on spark presence on all wires of ignition.
Whether there is a spark on all wires of ignition?
-
The system is perfectly in order
-
9
1. Replace the ignition coil.
2. Connect a socket of the coil of ignition.
3. Check up on spark presence in all wires of ignition.
Whether there is a spark at all wires of ignition?
-
The system is perfectly in order
-
104
1. Replace ЭБУ
2. Connect a socket of the coil of ignition.
3. Check up on spark presence in all wires of ignition.
Whether there is a spark at all wires of ignition?
-
The system is perfectly in order
-
11
Check up a wire between the plug 3 sockets of the optical gauge and the plug 33 sockets ЭБУ on breakage or short circuit.
Whether malfunction is found?
-
The step 13 see
The step 12 see
12
Check up a wire between the plug 2 sockets of the optical gauge and the ignition switch on breakage or short circuit.
Whether malfunction is found?
-
The step 14 see
The step 15 see
13
Repair wires between the plug 3 sockets of the optical gauge and the plug 33 sockets ЭБУ.
Repair is finished?

The system is perfectly in order

14
Repair wires between the plug 2 sockets of the optical gauge and the ignition switch.
Repair is finished?

The system is perfectly in order

15
1. Include ignition, without starting the engine.
2. Measure pressure between the plug 33 sockets ЭБУ and weight.
Whether there is a measured size of pressure within the established size?
0 In or 5 In at the included ignition, 2 In at rotation of a cranked shaft
The step 18 see
The step 16 see
16
Check up a wire between the plug of 1 socket of the optical gauge and weight on breakage or short circuit.
Whether malfunction is found?
-
The step 17 see
The step 22 see
17
Repair wires between the plug of 1 socket of the optical gauge and weight.
Repair is finished?
-
The system is perfectly in order
-
185
1. Switch off ignition.
2. Connect a control lamp between the plug 2 sockets of the optical gauge and weight.
3. Include ignition, without starting the engine.
Whether the control lamp burns?
-
The step 19 see
The step 20 see
19
Connect a control lamp between the plug of 1 socket of the coil of ignition and "the positive" plug of the storage battery.
Whether the control lamp burns at rotation of a cranked shaft?
-
The step 5 see
The step 21 see
20
Check up on breakage or short circuit on weight in conducting between the plug of 2 coils of ignition and the ignition switch.
Whether malfunction is found?

The step 23 see
-
21
Repair wires between the plug of 1 socket of the coil of ignition and weight.
Repair is finished?
-
The system is perfectly in order
-
22
Replace the optical gauge.
Repair is finished?
-
The system is perfectly in order
-
23
Replace safety lock Ef4 or eliminate breakage in conducting between the plug 2 sockets of the coil of ignition and the ignition switch.
Repair is finished?
-
The system is perfectly in order
-
1      it is very important to check up on spark presence in all cylinders for isolation of malfunction or entrance signals or target signals of the coil of ignition.
2      At check of target signals ЭБУ (on signals of the moment of ignition) it is recommended to use an oscillograph to see change of signals of pressure. At measurement of these target signals alternating malfunction can take place. She cannot be found out the voltmeter.
3      After acknowledgement that (at the moment of ignition), ignitions arriving in the coil are perfectly in order, it is possible to define target signals ЭБУ that the ignition coil is faulty.
4      After acknowledgement that appropriate target signals of the optical gauge arrive in ЭБУ and acknowledgement of absence of malfunctions in electroconducting, it is possible to define that ЭБУ is faulty.
5      This step together with step 19 checks on pressure АКБ and grounding of the coil of ignition.

Check of an electric chain of the fan of a radiator
ЭБУ operates the radiator fan, being based on entrance signals from the gauge of temperature of a cooling liquid and conditioner inclusion/deenergizing. ЭБУ operates fan work on low frequency of rotation, internally earthing the plug 47 sockets ЭБУ. It includes the relay to low frequency of rotation of the fan of a radiator of the engine and operates with it at low frequency of rotation. Work of the fan of a radiator at low frequency of rotation is reached by the resistor of the fan of a radiator which lowers the pressure delivered to the fan. ЭБУ operates work of the fan of a radiator on high frequency of rotation, internally earthing the plug 50 sockets ЭБУ; includes the relay of high frequency of rotation of the fan of a radiator, bypassing (blocking) the resistor of the fan of a radiator. The radiator fan works on high frequency of rotation.
In the presence of complaints to an engine overheat establish, whether the cooling liquid or a measuring instrument of temperature of a cooling liquid has really boiled shows an overheat. If the engine overheats also the fan is included, check up system of cooling of the engine.
If safety locks Ef15 or Ef19 have fused right after their installations, check up on short circuit on weight in conducting of a corresponding chain. If the safety lock fuses at fan inclusion by the electronic block of management, probably, the fan engine is faulty.
ЭБУ includes the fan of a radiator for work on low frequency of rotation at temperature of a cooling liquid 93 ° With and switches off at 90 ° With.
ЭБУ includes the fan of a radiator for work on high frequency of rotation at temperature of a cooling liquid 100 ° With. ЭБУ switches from high frequency of rotation on low at 97 ° With.
Diagnostics of check of an electric chain of the fan of a radiator is resulted in tab. 3.19.

Table 3.19   Diagnostics of check of an electric chain of the fan of a radiator
Step
Performed works
Yes
No
1
Whether check of system of diagnostics was spent?
The step 2 see

2
1. Check up safety lock Ef19 of the block of safety locks.
2. Replace a safety lock if necessary.
The safety lock is perfectly in order?
Step З see
«Check of system of diagnostics» see
3
1. Check up safety lock Ef15 of the block of safety locks.
2. Replace a safety lock if necessary.
The safety lock is perfectly in order?
The step 4 see
«Check of system of diagnostics» see
41
1. Switch off ignition.
2. Translate the conditioner switch in position OFF.
The step 5 see
The step 6 see

3. Connect сканнер to a data transmission socket.
4. Start the engine.
5. The radiator fan should work at low turns, when temperature of a cooling liquid above 93 ° With.



Whether the radiator fan works at low frequency of rotation?


5
1. Switch off ignition.
2. Translate the conditioner switch in position OFF.
3. Connect сканнер to a data transmission socket.
4. Start the engine.
5. The radiator fan should work at high turns, when temperature of a cooling liquid above 100 ° With.
Whether the radiator fan works at high frequency of rotation?
The system is perfectly in order
The step 22 see
6
1. Connect a crosspiece with a safety lock between the plug 47 sockets ЭБУ and weight.
2. Include ignition, without starting the engine.
Whether the fan on low frequency of rotation 2 works with?
The step 21 see
The step 7 see
7
1. Switch off ignition.
2. Connect a crosspiece with a safety lock between the plug 47 sockets ЭБУ and weight.
3. Disconnect a socket of the fan of a radiator.
4. Connect a control lamp between the plug of 1 socket of the fan of a radiator and weight.
5. Include ignition, without starting up the engine.
Whether the control lamp burns?
The step 8 see
The step 9 see
8
1. Switch off ignition.
2. Connect a control bulb between the plug 2 sockets of the fan of a radiator and "the positive" plug of the storage battery.
Whether the control lamp burns?
The step 18 see
The step 17 see
9
1. Switch off ignition.
2. Disconnect the relay of low frequency of rotation of the fan of a radiator.
3. Connect a control lamp between the plug 86 relays of a socket of low frequency of rotation of the fan of a radiator and weight.
4. Include ignition, without starting up the engine.
Whether the control lamp 2 lights up with?
The step 10 see
The step 13 see
10
1. Switch off ignition.
2. Connect a control lamp between the plug 30 sockets of the relay of low frequency of rotation of the fan of a radiator and weight.
Whether the control lamp burns?
The step 11 see
The step 14 see
11
Connect a control bulb between the plug 87 sockets of the relay of low frequency of rotation of the fan of a radiator and "the positive" plug of the storage battery.
Whether the control lamp burns?
The step 12 see
The step 16 see
12
1. Connect a crosspiece with a safety lock between the plug 47 sockets ЭБУ and weight.
2. Connect a control lamp between plugs 85 and 86 sockets of the relay of low frequency of rotation of the fan of a radiator.
Whether the control lamp on 2 lights up with?
The step 19 see
The step 15 see
13
1. Eliminate wire breakage between the plug 86 sockets of the relay of low frequency of rotation of the fan of a radiator and the plug 87 sockets of the main relay.
2. Replace the main relay if necessary.
Whether the control lamp burns?
The system is perfectly in order
-
14
Eliminate wire breakage between the plug 30 sockets of the relay of low frequency of rotation of the fan of a radiator.
The system is perfectly in order
-
15
Eliminate wire breakage between the plug 85 sockets of the relay of high frequency of rotation of the fan of a radiator and the plug 47 sockets ЭБУ.
Repair is finished?
The system is perfectly in order
-
16
Check up on breakage a wire between the plug 87 sockets of the relay of low frequency of rotation of the fan of a radiator and the plug of 1 socket of the fan of a radiator.
Whether malfunction is found?
The step 20 see
The step 17 see
17
Check up on breakage a wire between the plug 2 sockets of the fan of a radiator and weight.
Whether malfunction is found?
The step 20 see
The step 18 see
18
Replace the radiator fan.
Repair is finished?
The system is perfectly in order
-
19
Replace the relay of low frequency of rotation of the fan of a radiator.
Repair is finished?
The system is perfectly in order
-
20
Repair a wire if necessary.
Repair is finished?
The system is perfectly in order
-
21
Replace ЭБУ.
Repair is finished?
The system is perfectly in order
-
222
1. Connect a crosspiece with a safety lock between the plug 50 sockets ЭБУ and weight.
2. Include ignition, without starting up the engine.
Whether the radiator fan on high frequency of rotation 2 works with?
The step 21 see
The step 23 see
23
1. Switch off ignition.
2. Disconnect the relay of high turns of the fan of a radiator.
3. Connect a control lamp between the plug 86 sockets of the relay of high frequency of rotation and weight.
4. Include ignition, without starting up the engine.
Whether the control lamp on 2 has lighted up with?
The step 24 see
The step 28 see
24
1. Switch off ignition.
2. Connect a control lamp between the plug 30 sockets of the relay of high frequency of rotation of the fan of a radiator and weight.
Whether the control lamp burns?
The step 25 see
The step 29 see
25
Connect a control lamp between the plug 87 sockets of the relay of the fan of a radiator and "the positive" plug of the storage battery.
Whether the control lamp burns?
The step 26 see
The step 30 see
26
1. Connect a crosspiece with a safety lock between the plug 50 sockets ЭБУ and weight.
2. Connect a control lamp between the plug 85 sockets of the relay of high frequency of rotation by the fan of a radiator and "the positive" plug of the storage battery.
Whether the control lamp burns?
The step 27 see
The step 31 see
27
Replace the relay of high frequency of rotation of the fan of a radiator.
Repair is finished?
The system is perfectly in order
-
28
1. Repair a wire between the plug 86 sockets of the relay of high frequency of rotation of the fan of a radiator and the plug 87 sockets of the main relay.
2. Replace the main relay if necessary.
Repair is finished?
The system is perfectly in order
-
29
Eliminate wire breakage between the plug 30 sockets of the relay of high frequency of rotation of the fan of a radiator and safety lock Ef15.
Repair is finished?
The system is perfectly in order
-
30
Eliminate wire breakage between the plug 87 sockets of the relay of high frequency of rotation of the fan of a radiator and the plug of 1 socket of the fan of a radiator.
Repair is finished?
The system is perfectly in order
-
31
Eliminate wire breakage between the plug 85 sockets of the relay of high frequency of rotation of the fan of a radiator and the plug 50 sockets ЭБУ.
Repair is finished?
The system is perfectly in order
-
1     This step according to step 5 checks possibility ЭБУ to operate the radiator fan.
2     At direct grounding of the plug 50 sockets ЭБУ the radiator fan should work on high frequency of rotation.


Check of characteristics of atomizers
The tester of fuel atomizers is used for atomizer inclusion for a certain time, injecting the measured quantity of fuel in an inlet collector. Pressure difference in a fuel stage can be fixed (is written down and used for comparison of each fuel atomizer. On all fuel atomizers there should be an identical pressure difference in 10 кПа.
The example of check of balance of atomizers is resulted in tab. 3.20.

Table 3.20 the     Example of check of balance of atomizers
The cylinder
1
2
3
The first indication
380 кПа
280 кПа
380 кПа
The second indication
215 кПа
201 кПа
230 кПа
Difference combined value
165 кПа
179 кПа
151 кПа
Average range: 156-176кПа
The atomizer is perfectly in order
Faulty atomizer - very big pressure difference
Faulty atomizer - very low pressure difference

The prevention
The fuel system is under pressure. To avoid leak of fuel and risk of reception of damage or a burn, dump pressure in fuel system to a detachment of fuel tubes and hoses. Do not press or do not jam fuel hoses. Because of damage of hoses there can be a leak of fuel which can become a cause of the fire and receptions of traumas.
For prevention заливания the engine do not carry out check of balance of atomizers of more once (including all rechecks of faulty atomizers) without engine start-up.


Check
Time of cooling of the engine in 10 mines allows to avoid wrong indications because of fuel evaporation on the hot engine.
Check up characteristics of fuel atomizers in a following order:
Cautiously connect a measuring instrument of pressure of fuel, avoiding fuel leak;
The fuel pump should work nearby 2 with the ambassador of inclusion of ignition (the engine is not started up);
Insert the transparent tube attached to the final valve of a measuring instrument of pressure of fuel in the suitable container;
Let out all air from a measuring instrument of pressure of fuel and a hose;
The ignition switch should be in the switched off position the most smaller 10 with for end of a cycle of deenergizing of the electronic block of management;
Include ignition (without starting up the engine) for achievement of a maximum level of pressure of fuel;
Allow to be stabilised to pressure of fuel and then write down this initial indication of pressure. Wait, while movement of a needle of a measuring instrument of pressure of fuel will not stop;
Follow instructions of the manufacturer on use of conducting of an adapter;
Include a tester of atomizers and write down fuel pressure difference on him to the bottom mark. Write down size of the second indication. Subtract it from the first size for definition of a combined value of pressure difference;
Disconnect a tester from atomizers;
After ignition inclusion (the engine is not started up), for achievement of the maximum pressure once again, connect a tester to the following atomizer;
Include a tester and write down the indication of pressure of fuel;
Repeat this procedure for all atomizers;
Recheck atomizers on which the pressure difference size exceeds the established size on 10 кПа;
Replace atomizers on which malfunction, after recheck is found out;
If excess of size of pressure difference on all atomizers of the established size within 10 кПа, then atomizers work normally, in replacement of these atomizers there is no necessity;
Repeatedly connect conducting of atomizers and once again see the table of diagnostics of symptoms.



«To return back
3.4.1. The description of elements of system and their work
On the following page»
3.4.3. Repair of knots and control system elements