Overview of designated adaptation channels

WARNING: This page is about a different car, the 2008 Audi S4, 2008 Audi RS 4, and 2008 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

Adaptation channels "01", "02", "06" and "07" are in effect only for vehicles in which the auxiliary heater is installed as optional equipment. Since the auxiliary heater is not available in the USA, these adaptations are to be disregarded in the USA.
Adaptation channels "08", "09" and "81" are only provided for operating and display modules, Climatronic Control Module J255 as of hardware/software version "0711".
Adaptation channels "10" to "16" are only provided for operating and display modules, Climatronic Control Module J255 as of hardware/software version "1323" (gradual introduction at the factory as of 09.03).
Adaptation channels "17" to "19", "21" to "80" and "82" onwards are not used at present.
Adaptation channel "20" is only used with operating and display modules, Climatronic Control Module J255 with part number index "AJ" onwards (intended for resetting of all altered settings to factory adaptation). Such operating and display modules, Climatronic Control Module J255 are installed on vehicles as of VIN 400000 in Model Year 2005 (Saloon and Avant; gradual introduction for the Cabrio in week 46/04 without prior specification of any particular VIN ).
If the setting entered in adaptation channel "03" is "0", a note must be made in the vehicle documentation to the effect that the A/C Compressor Regulator Valve N280 can no longer be deactivated by the engine control module via the "air conditioner compressor shutoff" function.

Adaptation channel	Basic setting from manufacturer	Function	Changing basic setting
03	1 (on)	Compressor shutoff by engine control unit via "Air conditioner compressor shutoff" function In basic setting "1", the A/C Compressor Regulator Valve N280 (and thus the compressor) is switched off as soon as the request is received from the engine control module via the CAN-Bus comfort system (e.g. on acceleration) (Reading measuring value block, display group "002") The adaptation function can be used to suppress deactivation of the A/C Compressor Regulator Valve N280 because of "air conditioner compressor shutoff" by changing the adaptation to "0" (the operating and display module, Climatronic Control Module J255 ignores the request)	→ Adaptation in various adaptation channels (except adaptation channels "08" and "81"), performing
04	0 * See note	Engine/air conditioner compressor transmission ratio Adaptation cannot be altered; assignment is specified in operating and display module, Climatronic Control Module J255. The assignment to the relevant engine is transmitted via the CAN-Bus comfort system

Adaptation channel

Basic setting from manufacturer

Function

Changing basic setting

1 (on)

Compressor shutoff by engine control unit via "Air conditioner compressor shutoff" function

In basic setting "1", the A/C Compressor Regulator Valve N280 (and thus the compressor) is switched off as soon as the request is received from the engine control module via the CAN-Bus comfort system (e.g. on acceleration) (Reading measuring value block, display group "002")

The adaptation function can be used to suppress deactivation of the A/C Compressor Regulator Valve N280 because of "air conditioner compressor shutoff" by changing the adaptation to "0" (the operating and display module, Climatronic Control Module J255 ignores the request)

→ Adaptation in various adaptation channels (except adaptation channels "08" and "81"), performing

0 * See note

Engine/air conditioner compressor transmission ratio

Adaptation cannot be altered; assignment is specified in operating and display module, Climatronic Control Module J255.

The assignment to the relevant engine is transmitted via the CAN-Bus comfort system

* Depending on version of operating and display module, Climatronic Control Module J255 and engine

Adaptation channel	Basic setting from manufacturer	Function	Changing basic setting
05	1	Extended air conditioner requirement Adaptation cannot be altered; assignment is specified in operating and display module, Climatronic Control Module J255.

Adaptation channel	Basic setting from manufacturer	Function	Changing basic setting
08	3480 or 6400 * See note	Reduction of Fresh Air Blower speed on voice recognition To improve voice recognition and the clarity of telephone voice input, the Fresh Air Blower speed is reduced to the set value on vehicles as of Model Year 2002 (with operating and display module, Climatronic Control Module J255 as of hardware/software version "0711"). The reduction takes effect as soon as the message "Telephone voice input" is transmitted via the CAN-Bus comfort system. In setting "6800", the maximum Fresh Air Blower speed is reduced to approx. 25 % In the adjustment range "3480" (approx. 15%) to "22528" (approx. 88%), "256" units correspond to roughly 1% more or less reduction	→ Adaptation of fresh air blower RPM decrease, performing (adaptation channel 08)

Adaptation channel

Basic setting from manufacturer

Function

Changing basic setting

3480 or 6400 * See note

Reduction of Fresh Air Blower speed on voice recognition

To improve voice recognition and the clarity of telephone voice input, the Fresh Air Blower speed is reduced to the set value on vehicles as of Model Year 2002 (with operating and display module, Climatronic Control Module J255 as of hardware/software version "0711"). The reduction takes effect as soon as the message "Telephone voice input" is transmitted via the CAN-Bus comfort system.

In setting "6800", the maximum Fresh Air Blower speed is reduced to approx. 25 %
In the adjustment range "3480" (approx. 15%) to "22528" (approx. 88%), "256" units correspond to roughly 1% more or less reduction

→ Adaptation of fresh air blower RPM decrease, performing (adaptation channel 08)

* Depending on version of operating and display module, Climatronic Control Module J255, "3480" (approx. 15%) or "6800" (approx. 25%)

Adaptation channel	Basic setting from manufacturer	Function	Changing basic setting
09	118 (corresponds to 11.8 V)	Undervoltage shutoff value for "Auxiliary ventilation" function With operating and display modules, Climatronic Control Module J255 installed at the start of production, this value cannot yet be altered (gradual introduction) In setting "118", the "auxiliary ventilation" function is deactivated at a voltage of 11.8 V by the operating and display module, Climatronic Control Module J255. To ensure reliable engine starting, the voltage should never be adapted to a value less than 11.3 V (input "113").	→ Adaptation in various adaptation channels (except adaptation channels "08" and "81"), performing

Adaptation channel

Basic setting from manufacturer

Function

Changing basic setting

118 (corresponds to 11.8 V)

Undervoltage shutoff value for "Auxiliary ventilation" function

With operating and display modules, Climatronic Control Module J255 installed at the start of production, this value cannot yet be altered (gradual introduction)

In setting "118", the "auxiliary ventilation" function is deactivated at a voltage of 11.8 V by the operating and display module, Climatronic Control Module J255.

To ensure reliable engine starting, the voltage should never be adapted to a value less than 11.3 V (input "113").

→ Adaptation in various adaptation channels (except adaptation channels "08" and "81"), performing

Adaptation channel

Basic setting from manufacturer

Function

Changing basic setting

Adaptation of air flow to footwell in cooling mode (summer mode) in "Auto" setting on operating and display module, Climatronic Control Module J255

This function is only provided for operating and display modules, Climatronic Control Module J255 as of hardware/software version "1323" (gradual introduction at the factory as of 09.03).
In "Auto" mode, No cooled air is routed into the footwell in cooling mode (this is designed to prevent excessive cooling of the foot area)

In setting "0", the air flow to the footwell corresponds to that stored for this setting in the operating and display module, Climatronic Control Module J255 in line with the ambient conditions (corresponds to setting "2")

In setting "1", a greater volume of cooled air is routed to the footwell (the footwell flap is also opened slightly in cooling mode in line with the stored characteristic control curve).
In setting "2", only a small volume of cooled air is routed into the footwell (the footwell flap is closed in cooling mode; this setting is currently active with all settings).

→ Adaptation in various adaptation channels (except adaptation channels "08" and "81"), performing

Adaptation channel

Basic setting from manufacturer

Function

Changing basic setting

Resetting of all changes made to settings at operating and display module, Climatronic Control Module J255

This function is only provided for operating and display modules, Climatronic Control Module J255 with part number index "AJ" onwards (installed in vehicles as of VIN 400000 in Model Year 2005 for Saloon and Avant; gradual introduction for the Cabrio in week 46/04 without prior specification of any particular VIN ).

If "0" is displayed, all adjustable adaptation values are in the factory setting.

No changes have been made to adaptation in adaptation channels "01" to "16" of operating and display module, Climatronic Control Module J255
Any changes made to settings have been reset via the "Adaptation" function

If "1" is displayed, at least one factory-set adaptation has been altered.

Changes have been made to adaptation in adaptation channels "01" to "16" of operating and display module, Climatronic Control Module J255
The adaptation channels in which changes have been made to the adaptation are displayed in the measuring value block, display group "028"

To reset all altered settings, change the adaptation in this adaptation channel to "0" if applicable

→ Adaptation in various adaptation channels (except adaptation channels "08" and "81"), performing

Adaptation channel	Basic setting from manufacturer	Function	Changing basic setting
81		Adaptation of VIN The "Adaptation" function must be performed for operating and display modules, Climatronic Control Module J255 as of hardware/software version "0711" for which the malfunction "Control module incorrect Vehicle Identification Number (VIN)" is displayed.	→ Adaptation of Vehicle Identification Number (VIN), performing (adaptation channel "81")