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Display group "013” > < Display group "011”

A4 Cabriolet Mk2

Display group “012”
Display group “012”
Current engine speed transmitted by control unit in dash panel insert -J285-, vehicle speed, status and value of compressor torque transmitted to control unit in dash panel insert -J285-
   
Display zoneSignificanceExplanatory notes
1Current engine speed in rpm transmitted by control unit in dash panel insert -J285-
l  Data are transmitted by way of convenience data bus system
2Vehicle speed in km/h transmitted by control unit in dash panel insert -J285-
t  Display = “0”
–  No vehicle speed signal detected since switching on ignition
t  Display = “1”
–  Vehicle speed signal greater than 5 km/h received at least once from control unit in dash panel -J285- since switching on ignition
t  Display = “1..... XX”
–  Current vehicle speed in km/h
l  Data are transmitted by way of the convenience data bus system

  Note
If the vehicle was driven at more than 5 km/h after switching on the ignition and before starting self-diagnosis, “1” is displayed with the vehicle stationary to indicate that at least one vehicle speed signal has been received.
   
Display zoneSignificanceExplanatory notes
3Status of compressor torque transmitted to engine control unit (via control unit in dash panel insert -J285-) (display zone 4)
t  Display = “0”
–  The compressor torque transmitted is currently valid
t  Display = “1”
–  The compressor torque transmitted is no longer valid
l  Data are transmitted via the convenience data bus system to the control unit in dash panel insert -J285-, from where they are relayed via the drive data bus system to the engine control unit.

  Note
“1” is displayed e.g. for a brief period after switching on ignition or if terminal “15” is not active (no signal received from control unit in dash panel insert -J285-).
   
Display zoneSignificanceExplanatory notes
4Engine torque required for compressor operation in Nm calculated by operating and display unit, Climatronic control unit -J255- and transmitted to engine control unit (via control unit in dash panel insert -J285-)
l  Calculated by operating and display unit, Climatronic control unit -J255-
l  Data are transferred via the convenience data bus system to the control unit in dash panel insert -J285-. The control unit in dash panel insert -J285- transmits the data via the drive data bus system to the engine control unit.
–  The calculated torque is determined by various factors of influence (refer to note).
 
t  Display = “0....1.0” Nm
–  Compressor off (air conditioning system compressor regulating valve -N280- is not actuated)
–  A torque of less than “1” is displayed if, for example, the operating and display unit, Climatronic control unit -J255- is set to “ECON” mode.
 
t  Display = “1..... XX” Nm
–  Compressor on (air conditioning system compressor regulating valve -N280- is actuated)
 

  Note
The operating and display unit, Climatronic control unit -J255- uses various measured values for calculating compressor torque (e.g. ambient temperature, pressure in refrigerant circuit, engine speed). Depending on these variables, the value calculated may be 1....25 Nm with the compressor switched on. A value of less than 1.0 Nm is displayed if the compressor is switched off.
   

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