Service Infiniti QX4 since 1996 of release
1. Introduction
2. The maintenance instruction
3. Routine maintenance
4. The engine
5. Cooling and heating systems
5.1. Specifications
5.2. Antifreeze - the general data
5.3. Service of system of cooling
5.4. Removal, installation and check of serviceability of functioning of the thermostat
5.5. Removal, regenerative repair and installation of a radiator of system of cooling
5.6. Replacement of the water pump
5.7. Removal and installation of the fan of system of cooling
5.8. Air lines of distribution of air submitted to salon
5.9. System of an automatic air conditioning – a design and a functioning principle
5.10. A design of a refrigerator path of a central air of air
5.11. Compressor K/V, - the general information and a functioning principle
5.12. The Receiver-dehumidifier - the general information and service
5.13. Check of serviceability of functioning and service of systems of heating and an air conditioning
5.14. Diagnostics of a central air of air
6. Power supply systems and managements
7. Start and charge systems
8. A transmissionnaja line
9. Brake system
10. A suspension bracket and a steering
11. A body
12. An electric equipment
 












5-14-diagnostika-sistemy-kondicionirovaniya-vozdukha.html

5.14. Diagnostics of a central air of air

 PERFORMANCE ORDER

  1. Include ignition.
  2. Within 5 seconds after realisation of start of the engine press button OFF on control panels K/V and keep its pressed during not less than 5 seconds.


Step 1 - check of light-emitting diodes and active zones of the display

 PERFORMANCE ORDER

  1. Make sure of serviceability of a luminescence of all light-emitting diodes.
  2. Check up serviceability of functioning of all segments of active zones of the screen.
  1. If any light-emitting diodes does not burn, or defects of the screen take place switch OFF, hence, is faulty, or the fluorescent tube of the display has failed. Replace amplifier AUTO K/V.
  1. If everything is all right, pass to a following stage of check.


Check of serviceability of functioning of switch HOT

 PERFORMANCE ORDER

  1. Press the switch (HOT) control panels K/V.
  2. On the screen should the transition offer to a step of 2 checks («Advance to self-diagnosis STEP 2 will be highlighted?»), otherwise switch HOT is damaged and it is necessary to replace amplifier AUTO K/V.


Check of serviceability of functioning of switch COLD

 PERFORMANCE ORDER

  1. Press the switch (COLD) control panels.
  2. On the screen should the return offer to a step of 1 check («Return to self-diagnosis STEP 2 will be highlighted?»), otherwise switch COLD is damaged and it is necessary to replace amplifier AUTO K/V.


Step 2 – check of a condition of chains of information gauges K/V on breakage and short circuit

 PERFORMANCE ORDER

  1. Press the switch (HOT), — on the screen the code № 20 should be highlighted .
  1. If the code 20 is highlighted regularly, pass to a following stage of check, otherwise pass to last stage.


Step 3 – check of serviceability of functioning inlet заслонки and заслонки switchings of modes of circulation

 PERFORMANCE ORDER

  1. Press the switch (HOT), — on the screen the code № 30 should be highlighted .
  1. If the code 30 is highlighted regularly, pass to a following stage of check, otherwise pass to last stage.


Step 4 – check of serviceability of functioning of actuation mechanisms

 PERFORMANCE ORDER

  1. At the started engine press the switch (HOT).
  1. Нажимание on button DEF should lead consecutive высвечиванию codes with 41 on 46, confirming serviceability of functioning of all actuation mechanisms (the following stage of check see).


Identification of actuation mechanisms


Identification card of conditions of actuation mechanisms К/В

Code number Actuation mechanism procedure for test
Drive regime заслонки Drive inlet заслонки Drive mixing заслонки Drive of the fan of a heater Compressor drive

41

The closed circulation

Maximum хладопроизводительность

4—5В

It is included

42

The closed circulation

Maximum хладопроизводительность

9—11В

It is included

43

20 percent giving of fresh air

The maximum heating

7—9В

It is switched off

44

100 percent giving of fresh air

The maximum heating

7—9В

It is switched off

45

100 percent giving of fresh air

The maximum heating

7—9В

It is included

46

100 percent giving of fresh air

The maximum heating

10—12В

It is included


Check of serviceability of functioning of a drive of switching of directions of distribution of air

Position of the handle of a choice of directions of distribution Direction of giving of air
On obverse level In foot wells On having blown in glasses

100 %

   

60 %

40 %

 

80 %

20 %

60 %

40 %

 

100 %


 PERFORMANCE ORDER

  1. The identification card (the Identification card of conditions of actuation mechanisms К/В see the table) allows to estimate serviceability of a condition of all actuation mechanisms used in system K/V.
  2. Also check up serviceability of a drive of switching of directions of distribution of air (Check of serviceability of functioning of a drive of switching of directions of distribution of air see the table).
  3. At serviceable functioning of all actuation mechanisms pass to check point 9, otherwise make necessary regenerative repair.


Step 5 – Check of serviceability of functioning of gauges of temperature

 PERFORMANCE ORDER

  1. Press the switch (HOT), — on the screen the code № 5 should be highlighted .
  1. Pass to a following stage of check.


The gauge of temperature of external air

 PERFORMANCE ORDER

  1. Unitary press the switch (DEF), — on the screen the indication of temperature of external air should be highlighted.

The conclusion to the screen of inscription ECON testifies to negative indications.

  1. If the displayed value considerably differs from real, it is necessary to check up at first a condition of electroconducting of a chain of the gauge, then actually the gauge.


The gauge of temperature of air in salon


Example of a conclusion of identification codes of refusals of the gauge-switch заслонки switchings of modes of distribution / of air circulation


Identification card of codes of indications of gauges-switches of position of electromotors of a drive заслонок

Code *, ** Position заслонки
On obverse level In foot wells

31

Заслонка switchings of modes of circulation

32

34

35

36

37

Entrance заслонка

38

20 percent giving of fresh air

39

100 percent giving of fresh air


* The conclusion to the screen of following indications testifies about рассоединении a contact socket of electroconducting of the motor of a drive regime заслонки: 32> 32> 34> 35> 36> return to 31.


* The conclusion to the screen of following indications testifies about рассоединении a contact socket of electroconducting of the motor of a drive entrance заслонки: 37> 38> 39> return to 37.


 PERFORMANCE ORDER

  1. Press the switch (DEF) repeatedly, — on the screen the indication of temperature of air in salon should be highlighted.

The conclusion to the screen of inscription ECON testifies to negative indications.

  1. If the displayed value considerably differs from real, it is necessary to check up at first a condition of electroconducting of a chain of the gauge, then actually the gauge.
  1. On an illustration the card of diagnostic codes of refusals of gauges of temperature is presented.

  1. The example of a conclusion to the screen of a diagnostic code — see an illustration the Example of a conclusion of identification codes of refusals of the gauge-switch заслонки switchings of modes of distribution / of air circulation).


Check of serviceability of functioning of gauges-switches of position of electromotors of a drive заслонок

 PERFORMANCE ORDER

  1. During the given check serviceability of functioning of gauges-switches of a drive entrance заслонки and заслонки switchings of modes of distribution / of air circulation (the Identification card of codes of indications of gauges-switches of position of electromotors of a drive заслонок see the table) is defined.
  2. The example of a conclusion to the screen of an identification code of position заслонки — see an illustration the Example of a conclusion of identification codes of refusals of the gauge-switch заслонки switchings of modes of distribution / of air circulation).


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5.13. Check of serviceability of functioning and service of systems of heating and an air conditioning
On the following page»
6. Power supply systems and managements