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Home >> Audi >> 2016 >> S5 Prestige, 2D Convertible >> Repair and Diagnosis >> External Pages >> Different car >> Section 1499 (Heating & Air Conditioning (On Board Diagnostic)) >> 01 On Board Diagnostic (OBD) >> Read Measuring Value Block (function 08) >> Measuring value blocks from display group "011" through "020" >> Display group "015"

Display group "015"

WARNING: This page is about a different car, the 2008 Audi S4, 2008 Audi RS 4, and 2008 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.

Activation for Heated Rear Window Z1, Heated Windshield Z2 and supplementary heater (electric or fuel-driven) and position of convertible top on Audi Cabrio 

Display field Meaning Remarks
1 Activation for Heated Rear Window Z1
  • Display = "Off"
  • Activation for Heated Rear Window Z1 off
  • Display = "On"
  • Activation for Heated Rear Window Z1 on
  
NOTE:
  • Checking activation of Heated Rear Window → Heated Rear Window Z1, testing 
  • On vehicles up to VIN 399999 in Model Year 2005 (Saloon and Avant; gradual introduction for the Cabrio in week 46/04 without prior specification of any particular VIN ), the Heated Rear Window Z1 is activated directly by the operating and display module, Climatronic Control Module J255 (the relay for switching the current is installed in the operating and display module, Climatronic Control Module J255).
  • On vehicles as of VIN 400000 in Model Year 2005 (Saloon and Avant; gradual introduction for the Cabrio in week 46/04 without prior specification of any particular VIN ), the Heated Rear Window Z1 will no longer be activated directly by the operating and display module, Climatronic Control Module J255 (operating and display modules, Climatronic Control Module J255 with part No. index "AJ" onwards are no longer installed with a relay). On these vehicles, the Heated Rear Window Z1 is activated via the Rear Window Defogger Relay J9.
  • At ambient temperatures below 0 °C, the Heated Rear Window remains switched on until the ignition is switched off (manual deactivation is possible at any time). If the temperature during a driving cycle rises above 0 °C, the Heated Rear Window Z1 is deactivated on completion of the operating period stored in the operating and display module, Climatronic Control Module J255 (approx. 12 minutes).
  • At ambient temperatures greater than 0 °C, activation of the Heated Rear Window Z1 is terminated automatically on completion of the operating period (approx. 12 minutes) stored in the operating and display module, Climatronic Control Module J255 via the operating and display module, Climatronic Control Module J255.
Display field Meaning Remarks
2 Signal for activation of Heated Windshield Z2  
  Display = "n. installed" (or "00")
  • The operating and display module, Climatronic Control Module J255 has been coded for a vehicle not installed with a Heated Windshield Z2 as optional extra. If applicable, check coding of operating and display module, Climatronic Control Module J255 → Climatronic Control Module J255, coding (function 07) .
  Display = "00" (or "0")
  • Request for activation of Heated Windshield Z2 off
  • Activation for Heated Windshield Z2 off
  • Switch in operating and display module, Climatronic Control Module J255 open
  • No check of voltage at connector "C", contact "8" to operating and display module, Climatronic Control Module J255
  Display = "10"
  • Request for activation of Heated Windshield Z2 on
  • Activation for Heated Windshield Z2 off
  • Switch in operating and display module, Climatronic Control Module J255 closed
  • Switch at output of Heated Windshield Control Module J505 to operating and display module, Climatronic Control Module J255 open
  • Voltage at connector "C", contact "8" to operating and display module, Climatronic Control Module J255 less than 5 V
  Display = "11"
  • Request for activation of Heated Windshield Z2 on
  • Activation for Heated Windshield Z2 on
  • Switch in operating and display module, Climatronic Control Module J255 closed
  • Switch at output of Heated Windshield Control Module J505 to operating and display module, Climatronic Control Module J255 closed
  • Voltage at connector "C", contact "8" to operating and display module, Climatronic Control Module J255 greater than 5 V and less than 8 V
NOTE:
  • The display for vehicles not installed with a Heated Windshield Z2 and a Heated Windshield Control Module J505 is "n. installed" or "0" or "00".
  • The Heated Windshield Control Module J505 switches approx. Battery voltage to the output to the operating and display module, Climatronic Control Module J255 as long as the voltage at the Heated Windshield Control Module J505 is greater than 12.70 V and the control unit is not too hot.
  • If the Heated Windshield must be activated, the operating and display module, Climatronic Control Module J255 activates a transistor which halves the voltage at connector "C" contact "8". The Heated Windshield Control Module J505 then switches on the Heated Windshield.
  • If, during heating of the windshield, the voltage (electrical system voltage at Heated Windshield Control Module J505) drops below 12.70 V or if the Heated Windshield Control Module J505 become too hot, a switch in the Heated Windshield Control Module J505 opens and the voltage at the output to the operating and display module, Climatronic Control Module J255 drops below 5 V. At the same time, the Heated Windshield is deactivated by the Heated Windshield Control Module J505.
  • For operation of Heated Windshield Z2, refer to → Windshield defroster .
Display field Meaning Remarks
4 Saloon, Avant (or Coupe)
  • Display = "n. installed"
Or
  • Display = "Closed"
  • The operating and display module, Climatronic Control Module J255 has been coded for a vehicle with no convertible top. If applicable, check coding of operating and display module, Climatronic Control Module J255.
  Detection of position of convertible top on Cabrio
  • Display = "Closed"
  • Convertible top closed
  • Display = "Open"
  • Convertible top open
  • Data are transmitted via the CAN-Bus comfort system
  • The Convertible Top Control Module J256 transmits the information "convertible top open or closed"
NOTE:
  • Display only applicable to Audi Cabrio.
  • If an open convertible top is detected on an Audi Cabrio, the operating and display module, Climatronic Control Module J255 alters the control characteristic curve of the air conditioner (no enclosed passenger compartment).
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