Climatronic Control Module (J255)
Climatronic Control Module (J255)
• Not installed on vehicles with manually regulated A/C system.
• The Climatronic control module currently can be interchanged; the component protection is not in effect. Check using Vehicle diagnosis, testing and information system (VAS5051B) in "Guided Fault Finding".
• If a Climatronic control module with active component protection (anti-theft system, introduction not yet finalized) 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 Vehicle diagnosis, testing and information system (VAS5051B) in "Guided Fault Finding".
• Component protection (anti-theft system, introduction not yet finalized) can only be cancelled by entering specific vehicle data using Vehicle diagnosis, testing and information system (VAS5051B) in "Guided Fault Finding".
• Climatronic control module may also be designated only "Climatronic Control Module -J255-" in the wiring diagrams.
• Assign the correct version and variant when replacing the Climatronic control module. Refer to Electronic Parts Catalog (ETKA).
• Different versions of the Climatronic control module in vehicles with an air quality sensor (G238) (with a button for "automatic air recirculation" - C - or a button for switching off climate controls OFF button), with and without controls for heated seats, with and without radio navigation system (or radio with large control panel). Part number index must therefore be heeded. Refer to Electronic Parts Catalog (ETKA).
• Turn off the A/C by pressing the "blower -" button on the Climatronic control module on vehicles with an air quality sensor and a "automatic recirculating air mode" button - C -. Refer to the vehicle Owner's Manual.
• After installing Climatronic control module, perform Basic Setting for A/C system according to specifications using Vehicle diagnosis, testing and information system (VAS5051B) in "Guided Fault Finding".
• If a new A/C control head was installed and Basic Setting was not performed, controls of the Climatronic control module are restricted and this is displayed as a malfunction in DTC memory. Check using Vehicle diagnosis, testing and information system (VAS5051B) in "Guided Fault Finding".
• Display fields and control buttons on Climatronic control module are illuminated by Light Emitting Diodes (LEDs, cannot be replaced).
• Covers of both temperature rotary switches of Climatronic control module can be replaced separately (pull off to remove). Refer to Electronic Parts Catalog (ETKA).
• If Instrument Panel Interior Temperature Sensor (G56) sends incorrect measurements, check intake grille on panel of Climatronic control module (it must not be sealed) and function of Interior Temperature Sensor Fan (V42).
• The selected functions are displayed by illuminated LEDs in the various buttons of Climatronic control module.
• Perform the following work (basic setting, check the DTC memory, checking the coding and adaptation) after replacing the front Climatronic control module using Vehicle diagnosis, testing and information system (VAS5051B) in "Guided Fault Finding".
• Displayed unit of temperature display of Climatronic control module (in °C or °F) is specified by the coding. The display unit can be changed as follows: turn on the ignition and then press and hold the "air recirculation button" - A -. With the air recirculation button pressed in, rotate the left temperature rotary switch - B - (driver side) to "temperature +" position and hold it in this position for at least 2 seconds. Temperature display changes from °C or F ° or vice versa. Release temperature rotary switch and recirculating air button.
• Temperature setting on driver side can be transferred to front passenger side by pressing "Auto" button for longer than approximately 5 seconds. This setting can then be changed together for both sides by operating the left temperature rotary switch - B - (driver side), this setting can be cancelled again by operating the right temperature rotary switch (front passenger side) once. Refer to the Owners Manual.
• On vehicles equipped with an auxiliary heater, depending on the adaptation of the Climatronic control module can be switched on by using the "blower +" button with the ignition switched off or the "parking ventilation". Check using Vehicle diagnosis, testing and information system (VAS5051B) in "Guided Fault Finding" and the Owners Manual.
• On vehicles with parking heater and Climatronic control module with Part No. 8P0 820 043 up to Index Q (hardware version up to H18 and software version up to 0260), it is possible that the setting on the A/C control head can no longer be modified under certain operating conditions after parking heater has started. After switching the ignition off and on again, the settings can be modified again as normal. If there is a complaint of this malfunction, flash the software of Climatronic control module anew if necessary using Vehicle diagnosis, testing and information system (VAS5051B) in "Guided Fault Finding".
• Climatronic Control Module (J255) , removing and installing, refer to=> [ Climatronic Control Module (J255) ] Climatronic Control Module (J255).
• Installation time for the different versions of the Climatronic control module (J255) => [ Climatronic Control Module, Applications ] Climatronic Control Module, Applications.