Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSAUDI2005TT QUATTRO, 2D COUPE, 3.2 FREPAIR AND DIAGNOSISHEATING, VENTILATION & A/C (HVAC)HVAC CONTROL SYSTEMSHEATING & AIR CONDITIONING01 ON BOARD DIAGNOSTIC (OBD)AUTOMATIC CLIMATE CONTROL SYSTEM, ON BOARD DIAGNOSTIC (OBD)READ MEASURING VALUE BLOCK (FUNCTION 08)NOTES
2005 Audi TT Quattro, 2D Coupe, 3.2 F
Read Measuring Value Block (function 08): Notes
2005 Audi TT Quattro, 2D Coupe, 3.2 FSECTION Notes
NOTE:
- A/C control heads -E87- with part numbers without index letter have 10 measuring value blocks (display groups), each showing 4 measuring values (display fields).
- A/C control heads -E87- with part numbers including index letter "A", and onward have 11 measuring value blocks (display groups), each showing 4 measuring values (display fields).
- Regulation of the air conditioning remains functional during the On Board Diagnostic (OBD) Read Measuring Value Block" function 08 and the current measured values are displayed.
- Display groups 2 through 5 show the current actual or specified values and the learned values (stored during the last basic setting) for the end stops of the individual positioning motors.
- The positions of the positioning motors and flaps can be changed during the OBD using the control buttons on the A/C Control Head-E87-, and the current actual and specified values are displayed on the VAG 1551 Scan Tool (ST).
- If the printer is switched on, the current display will be printed out.
Read Measuring Value Block (function 08), initiating
- Start engine.
- Set A/C Control Head -E87- to AUTO mode (compressor is switched on).
- Allow fresh-air blower to run at high speed for approx. 1 minute (to allow positioning motors to settle into their final positions).
- Connect VAG 1551 Scan Tool (ST). Refer to VAG 1551 Scan Tool (ST), VAS 5051 Vehicle Diagnostic Testing and Information System, connecting and selecting functions .
- Press buttons -0- and -8- to insert "AC/Heating Electronics" address word 08 and advance program until "Select function XX" appears on display. Refer to VAG 1551 Scan Tool (ST), VAS 5051 Vehicle Diagnostic Testing and Information System, connecting and selecting functions .
| Rapid data transfer HELP Select function XX |
Indicated on display
- Press buttons -0- and -8- to select "Read Measuring Value Block" function 08.
| Rapid data transfer Q 08 - Read Measuring Value Block |
Indicated on display
- Press -Q- button to confirm input.
| Read Measuring Value Block Input display group number XXX |
Indicated on display
- Input display group number (overview. Refer to Overview of display group numbers which can be selected ).
- Press -Q- button to confirm input.
| Read Measuring Value Block X → 1 2 3 4 |
Indicated on display
To select another display group:
- Press -C- button.
| Read Measuring Value Block Input display group number XXX |
Indicated on display
- Input display group number.
NOTE:
Pressing the -3- button advances the program to the next display group. Pressing the -1- button moves the program back by one display group.
If all the display fields show the specified values:
- Press → button.
| Rapid data transfer HELP Select function XX |
Indicated on display
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.