Basic Setting (Function 04)

Perform Basic Setting - Function 04

NOTE:
- This Repair Information only outlines the function "Basic Setting". Perform the "basic setting" function in Guided Fault Finding Vehicle Diagnosis, Testing and Information System VAS 5051 in "Guided Fault Finding" function.
- For vehicles in which a Rear A/C Control Head (Climatronic) E265 is installed as optional equipment, after basic setting was performed in display groups "001" and "003" for front Climatronic Control Module J255, then basic setting must also be performed for Rear A/C Control Head (Climatronic) E265 (in "display group 001"). After basic setting, DTC memories of both control modules must then be checked and if necessary erased Vehicle Diagnosis, Testing and Information System in the "Guided Fault Finding" function.
- If a DTC should be detected in the "basic setting" function, it is stored in DTC memory Vehicle Diagnosis, Testing and Information System in the "Guided Fault Finding" function.

- With ignition switched off, connect Vehicle Diagnosis, Testing and Information System VAS5051/5052 with Diagnostic Cable - 3 Meter VAS5051/5A to 16-pin Data Link Connector (DLC) in vehicle. Vehicle Diagnostic, Testing and Information System VAS5051/5052, Connecting and Selecting Functions
- Switch ignition on or start engine (depending on the basic setting to be performed and).
- Select the front Climatronic Control Module J255 via address word "08" or the Rear A/C Control Head (Climatronic) E265 via address word "28". Vehicle Diagnostic, Testing and Information System VAS5051/5052, Connecting and Selecting Functions
- Check DTC memory of front Climatronic Control Module J255 (and of Rear A/C Control Head (Climatronic) E265) Vehicle Diagnosis, Testing and Information System VAS5051 in the "Guided Fault Finding" function. Check DTC Memory (Function 02)
- Select the "04 - basic setting" function of front A/C control head Climatronic Control Module J255.
- Via the input keyboard in display field, enter the desired display group and (e.g. "01" or "001" for "Display group number 001") and confirm by pressing the Q button.

The selected function of basic setting will now be performed.

Depending on the basic setting selected, now wait until basic setting has been performed completely (recognized by e.g. the indication on the display or the control module buttons no longer blinking) Vehicle Diagnosis, Testing and Information System VAS5051 in the "Guided Fault Finding" function.

NOTE:
- By clicking the <- button, you will return to the selection menu.
- If a malfunction is detected at a potentiometer of a control motor during Basic Setting, a substitution value is stored as the adaptation value (learned value for this potentiometer) and displayed in the corresponding measuring value block. The malfunction "upper limit exceeded or lower limit exceeded" is stored in DTC memory for this control motor.
- By pressing the buttons on the diagnostic tester display field, you can switch to a different display group or a different function (e.g. from "basic setting" to "Read measuring value block" and back again).

- Check DTC memory of front A/C control head Climatronic Control Module J255. Check DTC Memory (Function 02)

NOTE: Perform Basic Setting again if a malfunction was detected and repaired.

- End On Board Diagnostic (OBD) at front A/C control head Climatronic Control Module J255. Erase DTC Memory (Function 05), End Output (Function 06)
- Select Rear A/C Control Head (Climatronic) E265 (optional equipment) via address word "28". Vehicle Diagnostic, Testing and Information System VAS5051/5052, Connecting and Selecting Functions
- Perform basic setting for the components which have been actuated by Rear A/C Control Head (Climatronic) E265 in the same way as for components which have been actuated by the front Climatronic Control Module J255.
- Check DTC memory of Rear A/C Control Head (Climatronic) E265. Check DTC Memory (Function 02)

NOTE: Perform Basic Setting again if a malfunction was detected and repaired.

Overview Of Basic Setting Display Groups At Front A/C Control Head Climatronic Control Module J255

NOTE:
- For a newly installed front Climatronic Control Module J255, "Econ" mode is switched on for as long until basic setting in display groups "001" and "003" has been performed a minimum of one time successfully (indicator lamp in ECON button lights up). Only when basic setting has been performed successfully in display groups "001" and "003" can "Econ mode" be switched off.
- Once it has been activated, basic setting in display group "001" is fully implemented (even if the ignition is switched off and on again in the meantime, the link with the tester is interrupted or On Board Diagnostic (OBD) is terminated).
- As long as basic setting was not performed successfully, the malfunction "Basic setting not performed" with malfunction type "basic setting / adaptation not performed or performed incorrectly" appears in DTC memory. After basic setting has been performed successfully, the malfunction is erased automatically.
- After activation, front A/C control head Climatronic Control Module J255 requires a certain period of time for the "Basic Setting" function (e.g. 1-2 minutes for display group "001")

Basic setting in display groups "001" and "002"

Display group Basic Setting performed
001 Upon activating the "basic setting" function, various components which must be measured via a basic setting are actuated, depending on the version of the front Climatronic Control Module J255.
- So that this can be detected immediately, the front Climatronic Control Module J255 is in the "Basic setting" function.
- On the "Comfort" version, indicators in both displays are switched off (only the background lighting remains illuminated).
- On the "Basic" version, the indicator lamp in the ECON button starts to blink.
- Various A/C system control motors are actuated in such a way that they reach both end positions, resistance values of the potentiometers installed in the various control motors are then stored for both end positions Vehicle Diagnosis, Testing and Information System VAS5051 in the "Guided Fault Finding" function.
- Fresh Air Blower V2 is actuated with a specified voltage and the blower characteristic map is calculated from the feedback voltage and the measured values determined are stored
- Wait until basic setting is completed.
- Once basic setting has been performed successfully, the front Climatronic Control Module J255 sends the message "basic setting performed" (this message is not always displayed on the tester).
- On the "Comfort" version, indicators in both displays are switched on again.
- On the "Basic" version, the indicator lamp in the ECON button no longer blinks.
002 First operation of A/C system / compressor
- At this time, a basic setting in display group "002" is not possible.
- The function intended for basic setting in display group "002" is performed on this vehicle by initiating basic setting in display group "003" Vehicle Diagnosis, Testing and Information System VAS5051 in the "Guided Fault Finding" function.

Basic Setting display group "003"

NOTE:
- Basic setting in display group "003" can only be performed when basic setting in display group "001" has been performed successfully.
- As long as basic setting in display group "003" on a new front Climatronic Control Module J255 has not been performed once successfully, "Econ mode" cannot be switched off and the malfunction "running in procedure" with malfunction type "basic setting not performed or incorrectly performed" is displayed in DTC memory. After basic setting has been performed successfully, the malfunction is erased automatically.
- After activating Basic Setting, wait until it ends automatically by front A/C control head Climatronic Control Module J255 (indication in display or buttons no longer blink). If Basic Setting has aborted prematurely, A/C control head Climatronic Control Module J255 stores a DTC in DTC memory and various functions of A/C system cannot be selected.
- The duration and temperatures in display group "003" prescribed during basic setting can be adjusted via the "adaptation" function Vehicle Diagnosis, Testing and Information System VAS5051 in the "Guided Fault Finding" function.
- If the required measured values should not be obtained due to extreme ambient conditions (e.g. a very high outside temperature), perform this basic setting once more at an engine speed of approx. 2000 RPM.

Display group Basic Setting performed

003 Cooling performance test of A/C system / compressor
- This display group is intended for first operation of A/C system at the factory. Since the front Climatronic Control Module J255 is the same for the factory and service, this function on a new front Climatronic Control Module J255 must also be performed in customer service when first operating.
- So that this Basic Setting can be performed, engine must run at idle RPM and instrument panel air vents must be opened.
- After activation, front A/C control head Climatronic Control Module J255 requires approx. 5 minutes for this Basic Setting function.
- If basic setting has been activated, wait until the basic setting has ended (indicator on display of front Climatronic Control Module J255 e.g. no longer blinks) Vehicle Diagnosis, Testing and Information System VAS5051 in the "Guided Fault Finding" function.
- If the function is aborted e.g. by switching off ignition or the measured values are not OK, the malfunction "Test not OK upper limit exceeded", "system function test upper limit exceeded" or "system test upper limit exceeded" is stored in front A/C control head Climatronic Control Module J255, depending on version. At this time this malfunction can only be erased when this function has been performed again to the end and the measured values of the temperature sensors are then OK Vehicle Diagnosis, Testing and Information System VAS5051 in the "Guided Fault Finding" function.
- If the required measured values should not be obtained due to extreme ambient conditions (e.g. a very high outside temperature), perform this basic setting once more at an engine speed of approx. 2000 RPM.
004 At this time, a basic setting in display group "004" is not possible.

Basic setting in display groups "005" and "006"

NOTE:
- After activating basic setting "005", wait approx. 1 minute, then switch ignition off (time until control motors have reached their service positions).
- Basic setting "006" is also encompassed within basic setting "001" and therefore is only to be performed if e.g. Climatronic Control Module J255 or Fresh Air Blower V2 were replaced and basic setting "001" should not be performed for certain reasons.

Display group Basic Setting performed

005 Activation of service position for the various A/C system control motors
- So that the various A/C system control motors can be removed and installed together with the base plate, they must be located in a specific position (e.g. in center position between both end stops, depending on the control motor).
- If the ignition is switched off, the control motors remain in the previously set position (service position).
- After switching the ignition off and on again or pressing the AUTO button, the service function is exited and the A/C system operates in the mode which was in effect before selecting display group "005".
Upon activating the "basic setting" function, the following components are actuated, depending on the version of the front Climatronic Control Module J255.
- A/C system control motors are moved into a prescribed position.
- So that this can be detected immediately, the front Climatronic Control Module J255 is in the "Basic setting" function.
- On the "Comfort" version, indicators in both displays and indicator lamps in air distribution buttons blink.
- On the "Basic" version, the indicator lamp in the ECON button blinks.
006 Adaptation of characteristic curve for Fresh Air Blower V2 and for Climatronic Control Module J255
- Upon activating, the Fresh Air Blower V2 is actuated with a specified voltage via the Climatronic Control Module J255 and the blower characteristic curve is calculated from the feedback voltage.
- The determined measured values are displayed in the measuring value block Vehicle Diagnosis, Testing and Information System VAS 5051 in "Guided Fault Finding" function.
- On the "Comfort" version, both indicator displays and indicator lamps in both buttons for fresh air blower speed blink while the Fresh Air Blower V2 characteristic curve is adapted (on the "Basic" version the indicator lamp in the ECON button blinks.
- On vehicles with "seat ventilation" optional equipment, the information "Accept coding" is sent on the CAN-Bus system and thus codes the seat ventilation control modules to their installation location (left or right seat); introduction of this optional equipment is not yet finalized.
- Wait until basic setting is completed.
- After basic setting has been performed successfully, the front Climatronic Control Module J255 returns to the normal operating state.
- On the "Comfort" version, indicators in both displays are switched on again.
- On the "Basic" version, the indicator lamp in the ECON button no longer blinks.

Overview of display groups of basic setting at Rear A/C Control Head (Climatronic) E265

NOTE:
- For a newly installed Rear A/C Control Head (Climatronic) E265, "Econ" mode is switched on for as long until basic setting in display group "001" has been performed a minimum of one time successfully (indicator lamp in the On / OFF button lights up and "Auto" operating mode cannot be switched on). Only when basic setting has been performed successfully in display group "001" can the regulation be switched on.
- Once it has been activated, basic setting in display group "001" is fully implemented (even if the ignition is switched off and on again in the meantime, the link with the tester is interrupted or On Board Diagnostic (OBD) is terminated).
- As long as basic setting was not performed successfully, the malfunction "Basic setting not performed" with malfunction type "basic setting / adaptation not performed or performed incorrectly" appears in DTC memory. After basic setting has been performed successfully, the malfunction is erased automatically.
- After activating, the Rear A/C Control Head (Climatronic) E265 requires approx. 1 - 2 minutes respectively for the various functions of "basic setting".

Basic setting in display group "001"

Display group Basic Setting performed

001 are actuated, depending on the version of the Rear A/C Control Head (Climatronic) E265.
- So that it can be detected immediately that the Rear A/C Control Head (Climatronic) E265 is in the "basic setting" function, the indicator in both displays is switched off (only the background light remains illuminated).
- Various A/C system control motors are actuated in such a way that they reach both end positions, resistance values of the potentiometers installed in the various control motors are then stored for both end positions Vehicle Diagnosis, Testing and Information System VAS5051 in the "Guided Fault Finding" function.
- Rear Fresh Air Blower V80 is actuated with a specified voltage and the blower characteristic map is calculated from the feedback voltage and the measured values determined are stored
- Wait until Basic Setting has ended (display of Rear A/C Control Head (Climatronic) E265 appears again).
- After basic setting has been performed successfully, the Rear A/C Control Head (Climatronic) E265 sends the message "Basic setting performed"
002 to 004 At this time, a basic setting in these display groups is not possible.

Basic setting in display groups "005" and "006"

NOTE:
- After activating basic setting "005", wait approx. 1 minute, then switch ignition off (time until control motors have reached their service positions).
- Basic setting "006" is also encompassed within basic setting "001" and therefore is only to be performed if e.g. Rear Fresh Air Blower V80 or Rear Fresh Air Blower Control Module J391 was replaced and basic setting "001" should not be performed for certain reasons.

Display group Basic Setting performed

005 Activation of service position for various control motors which are actuated by the Rear A/C Control Head (Climatronic) E265
- Control motors which are actuated by Rear A/C Control Head (Climatronic) E265 can be removed in any position, therefore a service position is not necessary
- If the ignition is switched off, the control motors remain in the previously set position (service position).
- After switching the ignition off and on again or pressing the ON / OFF button, this function is exited and the A/C system operates in the mode which was in effect before selecting display group "005".
Upon activating the "basic setting" function, the rear A/C system control motors of Rear A/C Control Head (Climatronic) E265 are actuated and moved to a specified position.
- So that it can be detected immediately that the front Climatronic Control Module J255 is in the "basic setting" function, the indicator in both displays and indicator lamps in the air distribution buttons start to blink.
006 Adaptation of characteristic curve for Rear Fresh Air Blower V80 and for Rear Fresh Air Blower Control Module J391
- Upon activating, the Rear Fresh Air Blower V80 is actuated with a specified voltage via the Rear Fresh Air Blower Control Module J391 (by the Rear A/C Control Head (Climatronic) E265) and the blower characteristic curve is calculated from the feedback voltage.
- While the characteristic curve for the Rear Fresh Air Blower V80 is adapted, both indicator displays and indicator lamps in both buttons for fresh air blower speed of Rear A/C Control Head (Climatronic) E265 blink.
- Wait until Basic Setting has ended (display of Rear A/C Control Head (Climatronic) E265 appears again).
- After basic setting has been performed successfully, the Rear A/C Control Head (Climatronic) E265 returns to the normal operating state (indicator in both displays is switched on again).