Jetta Sedan L5-2.5L (CBTA) (2009)
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Control Assembly: Technical Service Bulletins
A/C - Climate Control Operation Information
87 09 08
Oct. 15, 2009
2018511 Supersedes T.B. Group 87 number 08-05 dated Aug. 11, 2008 to update warranty detail.
Vehicle Information
Condition
Climatic Controls Operation
Customer perceives selected temperature is not blowing the same temperature as selected.
Technical Background
Climatic controls the air temperature so that selected temperatures are reached as soon as possible, and then remain constant.
Temperature requests are relayed to the control module by a potentiometer in the rotary switch.
The information in this Technical Bulletin is to verify the controls are operating to specifications.
Production Solution
Not applicable.
Service
^
Connect VAS 5051B, 5052/A.
Tip:
Engine must be running with minimum coolant operating temperature of 87° Celsius (190° F). (see measuring value block 4/4).
^
Open all doors and windows to equalize cabin temperature and ambient air temperature.
Tip:
Do not use instrument cluster display to verify ambient or coolant temperature. (use measuring value blocks 4 group 4, and confirm ambient temperature
with an external source i.e. thermometer, thermocouple).
^
Select air distribution selection to center vents.
^
Close all side vents but keep center vents open.
^
Turn blower speed to 1 and press A/C button to turn system ON.
^
Turn off the air recirculation.
^
Insert a thermometer or thermocouple into center vent to obtain measurements.
