Adjusting CO2 level in additional heater exhaust gas (heater with no recirculating pump -V55) — AUDI

Checking CO2 level in additional heater exhaust gas => Page
82-104

Note:

Prerequisites for adjusting CO2 level in exhaust gas:

Additional heater in full load mode
Fault reader connected and auxiliary/additional heater self-diagnosis started
CO2 measuring instrument ready for operation and exhaust probe positioned in additional heater exhaust pipe such that emergence of exhaust gas is not impeded

Rapid data transfer
HELP
Select function XX
Indicated on display (function selection):

Press keys -1- and -0- to select "Adaption" function 10.

Rapid data transfer (Q)
10 - Adaption
Indicated on display:

Confirm entry with Q key.

Adaption (Q)
Enter channel number XX
Indicated on display:

Enter channel number -02-.
Confirm entry with Q key.

Notes:

Function unknown or cannot
⇒ be implemented at present
If this display appears, a fault has occurred and adaption cannot be implemented (interrogate instantaneous operating status =>Reading measured value block, Page
01-106).
Channel (02)
Adaption
XXX
⇒
Wait
If this display appears, additional heater is currently not in full load mode (interrogate instantaneous operating status =>Reading measured value block, Page
01-106).

If additional heater is in starting sequence, wait until it switches to full load mode.
If additional heater is in part load mode or control interval, allow coolant to cool down.

Channel (02)
Adaption
XXX
⇒
CO2 adjustment (-1
3-)
Indicated on display:

Read off measured value for CO2 (carbon dioxide) level on CO2 measuring instrument.

Settings:

Diesel engine
9 to 12 % by vol. CO2

Channel (02)
Adaption
XXX
⇒
CO2 adjustment (-1
3-)
Indicated on display:

CO2 level in exhaust gas can be altered by pressing button -1- or -3-.
CO2 level in exhaust gas is increased by approx. 0.08 % each time button -1- is pressed.
CO2 level in exhaust gas is reduced by approx. 0.08 % by pressing button -3-.

Notes:

Valid setting prior to adjustment remains stored if additional heater is switched off during CO2 adjustment or on exit from full load mode.
In the event of a considerable difference between specification and actual value, adaption value can also be entered directly.

Press ⇒ key.

Channel (02)
Adaption
XXX (Q)
Enter adaption value XXXXX
Indicated on display:

Enter desired numerical value and confirm entry with Q key.

CO2 level can only be altered within certain limits (adaption value e.g. between "00105" and "00136". Actual adjustment limits depend on basic setting for this unit made by auxiliary/additional heater manufacturer). If CO2 level cannot be set as required, check combustion air blower and air intake, metering pump fuel delivery and additional heater exhaust system.

Read off measured value for CO2 level on measuring instrument.

Channel (02)
Adaption
XXX
⇒
CO2 adjustment (-1
3-)
Indicated on display:

If CO2 level in exhaust gas is in specified range:

Press ⇒ key.

Channel (02)
Adaption
XXX (Q)
Enter adaption value XXXXX
Indicated on display:

Confirm entry with Q key.

Channel (02)
Adaption
XXX (Q)
Store altered value?
Indicated on display:

Confirm entry with Q key.

Channel (02)
Adaption
XXX
⇒
Altered value stored
Indicated on display:

Press ⇒ key.

Rapid data transfer
HELP
Select function XX
Indicated on display:

Press keys -0- and -6- to enter "End output" function 06.

Rapid data transfer (Q)
06 - End of output
Indicated on display:

Confirm entry with Q key.

Rapid data transfer
HELP
Enter address word XX
Indicated on display:

Switch off additional heater by way of "basic setting" function
=> Page
01-69.
Unplug diagnostic connector.