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Climatronic Control Module (J255) A/C Control Head






Climatronic Control Module (J255) A/C Control Head

- Climatronic Control Module removing and installing, refer to => [ Climatronic Control Module (J255) A/C Control Head ] Climatronic Control Module (J255) A/C Control Head.

• The Climatronic control module display and control heads currently can be interchanged; the component protection is not in effect. Component protection (anti-theft protection) can only be canceled by entering specific vehicle data using the Vehicle diagnostic tester in "Guided Fault Finding".

• If a Climatronic control module with active component protection (anti-theft system) is installed in a different vehicle, only the functions necessary for vehicle safety can be selected, comfort functions can no longer be selected. Check using the Vehicle diagnostic tester in "Guided Fault Finding".

• Follow the allocation exactly when replacing the Climatronic control module. Different versions for vehicles with the "Basis" A/C system or the"Comfort" A/C system, with or without buttons for seat heating and / or seat ventilation, etc. Refer to Electronic Parts Catalog (ETKA).

• The seat heating and ventilation is adjusted by the Climatronic control module; the adjustment is transmitted to the vehicle electrical system control module (J519) via the Data bus. The target temperatures for the different seat heating and seat ventilation settings are stored in the vehicle electrical system control module. Depending on the version of the vehicle electrical system control module and on the vehicle build date, the specified temperature for the seat heating and ventilation can be different with the same setting on the Climatronic control module. Check using the Vehicle diagnostic tester in "Guided Fault Finding" (for the vehicle electrical system control module).

• If a new Climatronic control module was installed and basic setting was not performed, A/C system regulation is limited and this is displayed in the DTC memory as a malfunction. After installing the Climatronic control module, perform the basic setting for the A/C to specifications by using the Vehicle diagnostic tester in "Guided Fault Finding".

• The Climatronic control module buttons, displays and rotary switches are illuminated by LEDs (the LEDs cannot be replaced).

• The function and indicator lights in the buttons and in the rotary switches cannot be replaced separately.

• If the Instrument Panel Interior Temperature Sensor (G56) measurement is incorrect, check the Climatronic Control Module intake grille trim (it must not be closed) and function of the Interior Temperature Sensor Fan (V42) using the the Vehicle diagnostic tester in "Guided Fault Finding".

• The selected functions are displayed when the function lights in the various Climatronic Control Module buttons, rotary switches or display fields light up.

• Depending on the version of the Climatronic control module the currently selected functions will appear only on the Multi Media Interface (MMI) display ("Basis" A/C system) or on the Climatronic control module and on the Multi Media Interface (MMI) display ("Comfort" A/C system). Set the duration of display using the "Adaptation" function in the Climatronic control module Guided Fault Finding using the Vehicle diagnostic tester in "Guided Fault Finding".

• If no malfunction is stored and the Climatronic Control Module is not working, check the adaptation (the function may be switched off by adjusting the function). If necessary, reset the adaptations in all adaptation channels to the manufacturer setting using the Vehicle diagnostic tester in "Guided Fault Finding".

• If there is a condition, where the heating or ventilation of the driver of passenger seat cannot be switched on, this will be stored as a malfunction in the Vehicle Electrical System Control Module (J519) , in the Memory Seat/Steering Column Adjustment Control Module (J136) or in Passenger Memory Seat Control Module (J521) (depending on the vehicle type and the vehicle equipment level). Currently no information is sent to the Climatronic control module display and control head via the data bus system; the DTC memory must be read out in each control unit or in the comfort system central control module (J393) using the Vehicle diagnostic tester in "Guided Fault Finding". In the event of a complaint regarding seat heating or seat ventilation, first check the event memory of the control modules activating the seat heating and seat ventilation.

• From MY 2010, this vehicle has a Start/Stop System for specific engines as optional equipment. On vehicles with Start/Stop system, the Climatronic control module prevents the Stop function. If, for example, "defrost" is selected, the stop function is not possible or will be interrupted and the engine will start. The same applies in the case of heating and cooling. The difference between the selected and actual temperature is greater than a specified value checked using the Vehicle diagnostic tester in "Guided Fault Finding".

• Vehicles with the Start/Stop System have an additional coolant pump for the Stop function depending on the vehicle equipment level and on the version of the vehicle. Refer to => [ Coolant Pump ] Coolant Pump

• On the Audi Q5, the Climatronic control module - A -, has an additional trim - B -.






• The trim piece - B - is supplied with a two-sided adhesive strip already installed - C -. Refer to Electronic Parts Catalog (ETKA).

• If the trim piece - B - is going to be re-used when replacing the Climatronic control module - A -, then remove the adhesive strip - C - from the trim - B -. Clean the adhesive surface on the trim - B - as described in the instructions which came with the adhesive strip. Affix to the trim piece - B - a strip (dimension: 204 mm x 10 mm) (8 in. x 0.4 in.) of the two-sided adhesive strip - C - with material strength approximately 1.2 mm (for example with adhesive tape D 438 515 A1. Refer to Electronic Parts Catalog (ETKA).

• At the start of production, this trim - B - is secured by clips - C - into the openings in the - D - Climatronic control module - A -. Later, the trim piece - B - was redesigned so that it can be secured by a suitable two-sided adhesive tape. The retaining tabs - F - are no longer on the trim piece - B -. Refer to Electronic Parts Catalog (ETKA).






• Since the openings - D - and slits - E - are no longer being used, only the trim piece - B - with the two-sided adhesive tape for the Climatronic control module - A -, is supplied as a replacement part. Refer to Electronic Parts Catalog (ETKA).

• Climatronic control module allocation, refer to => [ Climatronic Control Module (J255) A/C Control Head Allocation ] Climatronic Control Module (J255) A/C Control Head Allocation.

• Climatronic control module, removing and installing, refer to => [ Climatronic Control Module (J255) A/C Control Head ] Climatronic Control Module (J255) A/C Control Head.

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