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A4 Mk2

Display group “017”
Display group “017”
Transmitted/measured status, voltage at terminal “15”, “75” and “30”
   
Display zoneSignificanceExplanatory notes
1Information transmitted by steering column electronics control unit -J527- to terminal “15”
t  Display = “On”
–  Terminal “15” ON information being applied (ignition switched on)
t  Display = “Off”
–  Terminal “15” ON information not being applied (ignition switched off)
l  Data are transmitted by way of the convenience data bus system
–  The steering column electronics control unit -J527- transmits the information “Ignition on”
2Information transmitted by steering column electronics control unit -J527- to terminal “75”
t  Display = “On”
–  Terminal “75” ON information being applied (ignition switched on)
t  Display = “Off”
–  Terminal “75” ON information not being applied (ignition switched off or engine in the process of being started)
l  Data are transmitted by way of the convenience data bus system
–  The steering column electronics control unit -J527- transmits the information “Terminal 75 on”
–  With the ignition switched on, the terminal “75” ON information must always be applied except on starting the engine.

   
Display zoneSignificanceExplanatory notes
3Application of voltage from terminal “75” at operating and display unit, Climatronic control unit -J255-
t  Display = “On”
–  Connector “C”, contact “13” supplied with voltage from terminal “75” (ignition switched on)
t  Display = “Off”
–  Connector “C”, contact “13” not supplied with voltage from terminal “75” (ignition switched off or engine in the process of being started)
–  The voltage is determined by way of the input from connector “C”, contact “13” to the operating and display unit, Climatronic control unit -J255-
–  With the ignition switched on, voltage must always be applied to terminal “75” except on starting the engine.
4Measured voltage at terminal “30” in V
–  Terminal “30” voltage measured at connector “D”, contact “12”
–  The voltage is measured at connector “D” to the operating and display unit, Climatronic control unit -J255- between contacts “12” and “13”

   

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