Audi TT - 3 Diagnosis and Testing

Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
3 Diagnosis and Testing
⇒ “3.1 Heat Output and Temperature Door Activation, Checking“,
page 12
⇒ “3.2 Temperature Door and Heater Output Activation, Check‐
ing“, page 16
⇒ “3.3 Electrical Components Controlled by Heating System,
Checking“, page 16
3.1 Heat Output and Temperature Door Ac‐
tivation, Checking
⇒ “3.1.1 Test Requirements“, page 12
⇒ “3.1.2 Heating Performance, checking“, page 12
3.1.1 Test Requirements
Special tools and workshop equipment required
♦ Vehicle diagnosis, testing and information system -
VAS5051B- (or Vehicle Diagnosis and Service System -VAS
5052- ).
♦ A standard thermometer (for temperature measurements, if
necessary a thermometer with 2 measuring probes for simul‐
taneous measurement, for example, for temperature on the
right and left)
♦ Coolant circuit has been bled according to specifications. Re‐
fer to:⇒ Engine Mechanical; Rep. Gr. 19 General Information.
♦ All air ducts, covers and seals OK and properly installed.
♦ Air flow through dust and pollen filter not obstructed by dirt.
♦ Engine is warm.
♦ Climatronic control module -J255- DTC memory was checked
and erased, basic setting was performed and Climatronic con‐
trol module coding was checked using -VAS5051B- in "Guided
Fault Finding".
♦ Adaptation of Climatronic control module was checked using
-VAS5051B- in "Guided Fault Finding".
♦ Vehicle not exposed to sunlight.
3.1.2 Heating Performance, checking
Special tools and workshop equipment required
♦ Vehicle diagnosis, testing and information system -
VAS5051B- (or Vehicle Diagnosis and Service System -VAS
5052- ).
♦ A standard thermometer (for temperature measurements, if
necessary a thermometer with 2 measuring probes for simul‐
taneous measurement, for example, for temperature on the
right and left)
– Close hood.
– Close doors, windows and rear lid.
– Open all dash panel vents.
– Initiate heating system On Board Diagnostic (OBD) using -
VAS5051B- in "Guided Fault Finding".
– Measure the ambient temperature (temperature in workshop)
Audi TT 2007 ➤
Heating, Ventilation and Air Conditioning - Edition 01.2011
12 Rep. Gr.80 - Heating, Ventilation