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Display group "022” > < Display group "020”

A4 Mk2

Display group “021”
Display group “021”
Position of knurled wheel for heated front passenger seat cushion, actual and specified temperature of heater element in front passenger seat cushion (front passenger seat temperature sensor -G60-) and actuation of heater element in front passenger seat cushion (heated front passenger seat cushion -Z8-)
  Note
This display group need only be heeded for vehicles with heated seat cushions.
   
Display zoneSignificanceExplanatory notes
1Position of knurled wheel for heated front passenger seat cushion (installed in operating and display unit, Climatronic control unit -J255-)
t  Display = “Off (or less than 10%)”
–  Heated seat cushion switched off
t  Display = “10....100%”
–  Heated seat cushion switched on
l  Display depends on position of knurled wheel
–  Heated seat cushion is actuated if actual temperature in front passenger seat is lower than specified temperature

  Note
The position of the knurled wheel is determined in the operating and display unit, Climatronic control unit -J255- by way of a potentiometer (variable resistor). Tolerances in this potentiometer make it impossible to determine a fixed value for the respective position.
   
Display zoneSignificanceExplanatory notes
2Actual temperature of front passenger seat cushion heater element in °C measured by front passenger seat temperature sensor -G60-
l  Display depends on temperature of front passenger seat cushion

  Note
t  In the event of an open circuit in the wiring to the front passenger seat temperature sensor -G60- or in the actual front passenger seat temperature sensor -G60-, an actual temperature of less than -30 °C (e.g. -49 °C) is displayed as substitute value and the seat heating is not switched on.
t  The seat heater elements (heater elements for seat cushion, backrest and side bolsters) are differently wired. Depending on the design of the seat heating system, the side bolsters may still be heated in the event of an open circuit in the seat cushion heater element, for example. As however the seat cushion (and thus the front passenger seat temperature sensor -G60- in the seat) remains cold, heating of the side bolsters is not regulated. → General body repairs, interior; Rep. Gr. 74
t  If the alternator -C- is not generating sufficient current, the heat output of the seat heating system may be reduced by the operating and display unit, Climatronic control unit -J255- or the seat heating completely deactivated. If the voltage at the operating and display unit, Climatronic control unit -J255- is less than approx. 12.3 V (display group “017” → Chapter), the output to the seat heater elements is no longer constantly connected but rather only pulsed (although the specified temperature has not yet been attained). The seat heating system is completely deactivated if the voltage is less than approx. 10.6 V.
   
Display zoneSignificanceExplanatory notes
3Specified temperature of front passenger seat cushion heater element
t  Position of knurled wheel = “0” (seat heating off)
–  Specified temperature e.g. “- 41....-61 °C” (or -99 °C)
t  Position of knurled wheel = “1”
–  Specified temperature e.g. “16...21 °C” (or 18... 24 °C)
t  Position of knurled wheel = “2”
–  Specified temperature e.g. “22...27 °C” (or 25... 31 °C)
t  Position of knurled wheel = “3”
–  Specified temperature e.g. “28...34 °C” (or 32... 38 °C)
t  Position of knurled wheel = “4”
–  Specified temperature e.g. “35...43 °C” (or 39... 46 °C)
t  Position of knurled wheel = “5”
–  Specified temperature e.g. “44...54 °C” (or 47... 60 °C)
t  Position of knurled wheel = “6”
–  Specified temperature e.g. “55...65 °C” (or 61... 69 °C)
l  Display depends on position of knurled wheel for heated front passenger seat cushion (display zone “1”).
–  The specified temperature displayed is governed by the version of the operating and display unit, Climatronic control unit -J255- and may differ from the values given here.

  Note
t  If the knurled wheel is set to “0”, the display will be -41...-61 (-99) °C. This ensures that the seat heating will not be activated in this position even at extreme temperatures.
t  If the actual temperature measured (display zone “2”) is higher than the specified temperature set (display zone “3”) and the specified temperature displayed is below the temperature value indicated for this knurled wheel position, ignore the display in zone “3”.
t  The position of the knurled wheel is determined in the operating and display unit, Climatronic control unit -J255- by way of a potentiometer (variable resistor). Tolerances in this potentiometer make it impossible to determine a fixed value for the respective position. The specified temperature displayed may therefore differ from the specified temperature given in the display zone.
t  Depending on the version of the operating and display unit, Climatronic control unit -J255-, the specified (seat cushion) temperature shown in the display zone for this knurled wheel position either switches to the given specified temperature on moving out of position “0” (-41...-61 (-99 °C )) or the display does not switch from -41...-61 (-99 °C) to the given specified (seat cushion) temperature until the specified temperature is higher than the actual temperature measured in the seat cushion.
   
Display zoneSignificanceExplanatory notes
4Actuation of front passenger seat cushion heater element
t  Display = “Off”
–  Heated seat cushion switched off
l  The actual front passenger seat temperature is higher than the desired specified temperature
–  The actual front passenger seat temperature is lower than the desired specified temperature, but the electrical system voltage is too low (refer to notes on display zone “2”)
 
t  Display = “On”
–  Heated seat cushion switched on
l  The actual front passenger seat temperature is lower than the desired specified temperature

   

Display group "022” > < Display group "020”