Instructions. If there is a fault in the climate control system, read the fault memory of the climate control and display panel, Climatronic control unit -J255-. If an indication to read the fault memory on another control unit is indicated, the fault memory of this control unit must also be read (e.g. onboard power supply control unit -J519-, convenience system central control unit -J393-), certain climate elements. installations (e.g. compressor control valve -N280-, refrigerant temperature and pressure sender -G395-) The used and climate, settings, used Climatronic displays -J255- are no longer directly controlled / their measured values are no longer directly processed by the used and climate, settings, used Climatronic displays -J255-. If a fault is not displayed, read the measured value block of the climate control and display panel, settings, Climatronic control unit -J255-; the faulty component can be controlled using the function "Diagnostics of actuators". In this repair manual the function "electrical equipment check" not described. When conducting email checks using the function "Geluehrte Fehlersuche/guided troubleshooting" You can find instructions on the functions that need to be tested. The temperature-dependent resistance values of the different temperature sensors are presented in tables that can be called up using the function. After completing the repair, carry out the following work: interrogate the fault memory of the climate control and display module, settings, Climatronic control unit -J255- and delete any faults displayed. Check coding of climate control and display module, settings, Climatronic control unit -J255-. Check adaptation of climate control and display module, settings, Climatronic control unit -J255-. Perform basic climate control settings.
Elements outside the cabin, set of elements "1"
Instructions. The following figure shows the location of components and parts for the Audi A5 Coupe, Audi A5 Sportback, Audi A4, Audi Q5, etc. There are minor differences in the location of components/parts from this drawing.
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1. Heated rear window -Z1-. The request for rear window heating is sent by the climate control and display module for used Climatronic -J255- via the data bus system to the convenience system central control unit -J393-. The heated rear window -Z1 is controlled via the convenience system central control unit -J393-; 2. Comfort system central control unit -J393-. The heated rear window -Z1 is controlled via the convenience system central control unit -J393-; 3. An information plate with information about the type of refrigerant and the required filling volume; 4. Drains, drainage box. IN; the drainage box has one drain on the left and right; 5. Coolant supply shut-off valve. Depending on the engine, the shut-off valve is installed in the direct or return coolant line from the engine to the air conditioner heat exchanger. The shut-off valve is currently only installed on vehicles with 4- or 6-cyl. gasoline engine. If an autonomous heater is installed on a vehicle with such engines (as an additional equipment), then there is no shut-off valve (The coolant shut-off valve for the heating system -N279-, installed on vehicles with auxiliary heater, takes over this task - the auxiliary heater. The shut-off valve is controlled by vacuum via the coolant shut-off valve of the Climatronic unit -N422-; 6. Climatronic coolant shut-off valve -N422-. The installation location and design of the Climatronic coolant shut-off valve -N422- varies. Depending on the engine and set. a/m it can be installed in the engine. compartment or in the drainage box. The Climatronic coolant shut-off valve -N422- is currently only installed on vehicles with 4- or 6-cyl. engine). If an auxiliary heater is installed on a vehicle with such engines (as an additional equipment), then -N422- is missing (The heater coolant shut-off valve -N279-, installed on vehicles with auxiliary heater, takes on this task; 7. Outside temperature sensor -G17-. The measured value of the outside temperature sensor -G17- is evaluated by the onboard electrical system -J519- and sent via the data bus system to the Climatronic control unit -J255-; 8. Radiator fan -V7- and radiator fan 2 -U177- are installed in different versions depending on the set. car The command to switch on one or all radiator fans -V7- is transmitted to the air conditioning display Climatronic control unit -J255- via the data bus system to the corresponding engine control unit. The engine control unit then turns on 1 or all radiator fans (Radiator fan -V7- and radiator fan 2 -V177-) directly or via the cooling fan control unit -J293-.; Check the supply of control signals to the climate control panel, the settings of the Climatronic control unit -J255-. The corresponding engine control unit includes, for example, radiator fan -V7- and radiator fan 2 -V177- (directly or via radiator fan control unit -J293-) infinitely variable to the required power (depending on engine type); 9. Air composition sensor -G238-. The air composition sensor -G238- is only installed on vehicles with climate control system option "Komfort". The measured value from the air quality sensor -G238- is processed by the onboard electrical system -J519- and transmitted via the bus system to the Climatronic control unit -J255-. The control and display unit, Climatronic control unit -J255-, is activated when there is a recirculation command and there are no conditions for switching off; 10. Fresh air intake duct with grille. Check the fairing with the fresh air intake casing for correct installation and damage. Check for damage and the correct installation of the seals between the fresh air intake duct housing, the fairing and the glass cross member. These gaskets prevent water from seeping between the glass cross supports and through the fairing into the air conditioner intake duct. Pay attention to the correct position of the suction grille. The suction filter prevents the entry of foreign objects (e.g. foliage) into the air intake shaft, climate control, installations. Depending on the vehicle version for countries with a high dust content in the air (for example for China) there may be a filter instead of a grille that prevents dust and sand from entering through the supply fan; 11. Forced exhaust ventilation under the rear bumper, 1 forced exhaust ventilation is installed on the left and right. Seal The edges of the ventilation frame must move freely and close automatically. For perfect operation of the interior ventilation, the trunk trim should not block the air ducts.
Positioning, operating and functioning of the coolant shut-off valve for the Climatronic unit -N422- and the coolant shut-off valve
The installation location and design of the Climatronic coolant shut-off valve -N422- -B- and the coolant shut-off valve -A- depends on the engine kit. vehicle and on the time of manufacture. This illustration shows version -N422-B- for 6-cyl. FSI engine as installed at the start of production. Installed here -N422- -B- version "1" in the cylinder head area.
For certain vehicles (for example for Audi Q5 with 6-cyl. diesel) -N422- -B- is installed in the plenum chamber. This figure shows the execution "2" -N422-.
Instructions. The coolant shut-off valve for the Climatronic unit -N422- was installed, for example, at the beginning of production on vehicles with 6-cyl. FSI engine). Installation on other engines was carried out gradually in mod. year 2008. Exact application depends on the set. vehicle and production date. If, for example, the vehicle is equipped with an auxiliary heater, then -N422-B- and shut-off valve -A- are not installed. The heater coolant shut-off valve -N279- installed in vehicles with auxiliary heater performs the task.
When installing -N422- -B-, ensure that the low pressure hoses are connected correctly. When performing "1" pipe branch "3" -C- of the low pressure hose is connected to shut-off valve -A-. Through the pipe "2"-D- is supplied with vacuum from the engine. When performing "2" pipe branch "3" The low pressure hose -C- is connected to the shut-off valve -A-. Through the pipe "2"-D- is supplied with vacuum from the engine.
Instructions. This figure shows, for example, the location for 4-cyl. diz. engine 2009 model year. The vacuum reservoir of the shut-off valve -A- is ventilated after control has ended, for example when performing "2" -N422- -B- through the connection pipe located under the cap -E- "D. Depending on the version, the vacuum hose -O- (to shut-off valve -A-) may be marked with a white mark at the connection point. Ensure that vacuum hoses -N422--B- are correctly positioned. Mixed-up vacuum hoses can cause the interior heater to fail.
Instructions. -N422- -B- receives short control signals at certain intervals (for example, every 10 engine starts) from the operating and display unit, Climatronic control unit -J255- to check the function (no function needed). If the vacuum hoses are mixed up when connecting to -N422- -B-, control signals are also sent to the coolant shut-off valve -A- for a short time. At the end of control, if the vacuum hoses are reversed, the vacuum remains in the vacuum reservoir of the shut-off valve -A- for an indefinite period of time. In this case, the shut-off valve -A- does not open. If the shut-off valve -A- is closed, no coolant can flow to the heat exchanger and the air conditioning system does not heat up.
The coolant shut-off valve for Climatronic -N422- by climate control system, for example, only receives a control signal if the operating mode is set for the climate control system "OFF". In this case, the engine speed should be less than 5000 rpm, and the coolant temperature should be less than 90°C. By blocking the coolant circuit to the climate heat exchanger, the system accelerates engine heating when the coolant is cold. Since if the vacuum hoses are not connected correctly, the engine constantly sucks in a small amount of fresh air through the pipe "1" -N422-. This can additionally lead to problems in regulating the engine idle speed and introduce a fault into the memory of the engine control unit. The coolant shut-off valve -A-, depending on the engine and vehicle version, is installed either in the plenum chamber or in the engine. compartment (in this fig. Shown, for example, is the location in the plenum chamber on an Audi Q5 with 6-cyl. TDI engine).
The control of the coolant shut-off valve for the heating system -N422- can be switched via the function "Adaptation" climate, installations.
Instructions. For vehicles with 6-cyl. FSI engine. (in 6-cyl. TFSI engine not currently available) and in other engines with additional complete set (e.g. on vehicles with a start-stop system), but without additional set auxiliary heater, a coolant circulation pump -V50- is additionally installed (water pump - V36-). Depending on the version of the climate control and display unit, the Climatronic control unit -J255- may be indicated by the coolant circulation pump -V50- in the guided fault finding mode, as well as by the water pump -V36-. Control -V50- (-V36-) and -N422- depends on the set. and vehicle production dates. Coolant circulation pump - V50- (water pump -V36-) Depending on the production date, it is controlled via the circulation pump relay -L 60- (Via the same outlet as the Climatronic unit coolant shut-off valve -N422-) or directly from the climate control and display unit, settings, Climatronic control unit -J255-, which is gradually installed from model year 2009. Pay attention to the correct design of the climate control and display unit, settings, Climatronic control unit -J255- and the correct coding and adaptation in mode. J4a vehicles with circulation pump relay -L60- (e.g. for vehicles of the 2008 model year) -V50- is controlled (-V36-) with the ignition on, if the Climatronic coolant shut-off valve -N422- is not controlled correctly (e.g., at temperature conditions "warm" on the climate control and display panel, settings, Climatronic unit -J255-). On vehicles without circulation pump relay -L 60- (gradual introduction from model year 2009) the coolant circulation pump-U50-U36- with the ignition on, depending on the coolant temperature and the settings on the climate control and display unit, installation, Climatronic control unit -J255- was controlled directly from this unit. On vehicles in which the coolant circulation pump -V50- -V36- and the coolant shut-off valve for Climatronic -N422- are controlled directly from the climate control and display panel, installation, Climatronic control unit -J255-, faults remain in the panel on these components climate control and display, settings, Climatronic control unit -J255-. Therefore, the design, coding and adaptation of -J255- must be taken into account.
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