Contents Wiring diagrams Section: A/c Compressor All sections

Heating & Air Conditioning: Overview Audi TT 8N facelift

A/c Compressor ~554 words

Overview of display group numbers which can be selected

Display group numberDisplay fieldDescriptionDisplay field Refer to
0011A/C compressor cut-out conditionsDisplay group 001 - Compressor cut-off conditions, voltage for A/C clutch and at terminal 15
2Voltage for A/C clutch -N25- (in volts)
3Voltage at terminal 15 (in volts)
4Signal for "ignition off" period (standing time)
0021-4Temperature regulator flap motor -V68Display group 002 - Temperature regulator flap motor -V68
0031-4Central air flap motor -V70Display group 003 - Central air flap motor -V70
0041-4Footwell/defroster flap motor -V85Display group 004 - Footwell/defroster flap motor -V85
0051-4Air flow flap motor -V71Display group 005 - Air flow flap motor -V71
0061Calculated ambient temperature (for outside air temperature display -G106- in instrument cluster)Display group 006 - Calculated ambient temperature for outside air temperature display -G106-, measured values from fresh air intake duct temperature sensor -G89- and outside air temperature sensor -G17- and sunlight photo sensor -G107
2Fresh air intake duct temperature sensor -G89
3Outside air temperature sensor -G17
4Sunlight photo sensor -G107
Display group numberDisplay fieldDescriptionDisplay field Refer to
0071Not assignedDisplay group 007 - Sender for outlet temperature, floor outlet -G192-, instrument panel interior temperature sensor -G56-, calculated coolant temperature
2Sender for outlet temperature, floor outlet -G192
3Instrument panel interior temperature sensor -G56
4Coolant temperature
0081Specified voltage at fresh air blower -V2Display group 008 - Voltage at fresh air blower -V2- and voltage at terminals 58d/s
2Actual voltage at fresh air blower -V2
3Voltage at terminal 58d (according to setting of switches and instrument panel light dimmer switch -E20-) in %
4Voltage at terminal 58s (according to setting of switches and instrument panel light dimmer switch -E20-) in %
Display group numberDisplay fieldDescriptionDisplay field Refer to
0091Engine speed (RPM)Display group 009 - Engine speed (RPM), vehicle speed, auxiliary heater and key allocation
2Vehicle speed
3Auxiliary heater (not applicable to US models)
4E87- without part number suffix: Display field blank
E87- with part number suffix "A" and onwards: Ignition key allocation (HVAC setting memory)
0101Coolant temperature (signal sent by instrument cluster)Display group 010, display fields 1 - 3 - Excessive coolant temperature signal, A/C compressor cut-in/out, A/C pressure switches -F129-/-G65, signal from convertible top control module -J256
2A/C compressor cut-in/out
3A/C pressure switch -F129- (vehicles without high pressure switch -G65-). Voltage signal from Coolant Fan Control (FC) Module -J293- (vehicles with high pressure switch -G65-).
4Signal from convertible top control module -J256Display group 010, display field 4 - Signal from convertible top control module -J256
011 1)1 - 4The last four compressor cut-out conditions in effect for more than 20 seconds.Display group 011 (last four compressor cut-off conditions recognized)

1) Only vehicles with immobilizer in conjunction with A/C Control Head -E87- with part number suffix "A" and onwards.

Heating and A/C unit (with heater core and evaporator) mechanical components, overview

1 - Heater core

  1. Removing and installing. Refer to «Heater core, removing and installing»(ref-276291-S22774429202008010300000) .

2 - Seal

  1. Always replace
  2. Seals heater core from engine compartment.

3 - Mounting flange

4 - Screw

5 - Evaporator housing seal

  1. Always replace
  2. Seals refrigerant pipes from engine compartment.
  3. Location. See «Evaporator housing seal, location»(ref-276291-S18333132282008022600000) .

6 - Defroster duct

  1. Removing and installing. Refer to «Defroster vent air duct, removing and installing»(ref-276291-S16891302242008010300000) .

7 - Tensioning strap

  1. Must be installed correctly. See «Tensioning strap, installing»(ref-276291-S01575117012008022600000) .

8 - Climate control system wiring harness

  1. When installing, ensure proper clearance to moving parts. See «Installing wiring harness for air conditioner»(ref-276291-S13798975852008022600000) .

9 - Kick panel

  1. Secured with tensioning strap and screw clips.

10 - Screw clip

11 - Footwell duct/vent

  1. Removing and installing. Refer to «Footwell duct/vent, removing and installing»(ref-276291-S27928111012008010300000) .

12 - Heating and A/C unit

  1. With electrical components
  2. Electrical components, overview. Refer to «Heating and A/C unit (with heater core and evaporator) electrical components, overview»(ref-276291-S19825526062008010300000) .
  3. Removing and installing. Refer to «Heating and A/C unit (with heater core and evaporator), removing and installing»(ref-276291-S40296588312008010300000)
  4. Disassembly and assembly. Refer to «Heating and A/C unit (with heater core and evaporator), disassembly and assembly»(ref-276291-S23376928932008010300000) .

Heating and A/C unit (with heater core and evaporator) electrical components, overview

1 - Heating and A/C unit

  1. Disassembly and assembly. Refer to «Heating and A/C unit (with heater core and evaporator), disassembly and assembly»(ref-276291-S23376928932008010300000) .

2 - Fresh air intake duct temperature sensor -G89

  1. Removing and installing. Refer to «Fresh air intake duct temperature sensor -G89-, removing and installing»(ref-276291-S05940420262008010300000) .

3 - Air flow flap motor -V71

  1. Operates the air flow flap and fresh/recirculated air flap.
  2. With motor position sensor -G113-.
  3. Removing and installing. Refer to «Air flow flap motor -V71-, removing and installing»(ref-276291-S33576070412008010300000) .

4 - Screw

5 - Actuating arm

  1. To air flap

6 - Control module for fresh air blower -J126

  1. Removing and installing. Refer to «Control module for fresh air blower -J126-, removing and installing»(ref-276291-S02627083272008010300000) .

7 - Screw

8 - Fresh air blower -V2

  1. Removing and installing. Refer to «Fresh air blower -V2-, removing and installing»(ref-276291-S03235201202008010300000) .

9 - Mounting plate

10 - Screw

11 - Noise insulation

  1. Not installed on all vehicles.

12 - Screw

13 - Cover

14 - Screw

15 - Screw

16 - Temperature regulator flap motor -V68

  1. With motor position sensor -G92-.
  2. Removing and installing. Refer to «Temperature regulator flap motor -V68-, removing and installing»(ref-276291-S03304586492008010300000) .
  3. Actuating arm: black or pink.

17 - Actuating arm

18 - Central air flap motor -V70

  1. With motor position sensor -G112-.
  2. Removing and installing. Refer to «Central air flap motor -V70-, removing and installing»(ref-276291-S05756968622008010300000) .
  3. Actuating arm: green.

19 - Actuating arm

20 - Footwell/defroster flap motor -V85

  1. With motor position sensor -G114-.
  2. Removing and installing. Refer to «Footwell/defroster flap motor -V85-, removing and installing»(ref-276291-S04102862302008010300000) .
  3. Actuating arm: yellow.

21 - Actuating arm

22 - Mounting bracket for -V85

23 - Sender for outlet temperature, floor outlet -G192

  1. Removing and installing. Refer to «Sender for outlet temperature, floor outlet -G192-, removing and installing»(ref-276291-S36724030392008010300000) .