Test step "3"

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.

Voltage supply and wiring to Fresh Air Blower Control Module J126 and Fresh Air Blower V2

Test step 3.1 Checking power supply to Fresh Air Blower V2

Switch off ignition.
Remove glove compartment. →
- 68 - INTERIOR EQUIPMENT
- 68 - INTERIOR EQUIPMENT for BODY INTERIOR - CABRIOLET

Fig 1: Identifying Fresh Air Blower Control Module J126 Connector & Voltage Between Contact And Contact At Connector

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Disconnect connector - A - from Fresh Air Blower Control Module J126 - B -.
Measure voltage between contact - 4 - and contact - 3 - at connector - A -.

Specified value: approx. Battery voltage

NOTE:

If the voltage is below Battery voltage, use wiring diagram to repair voltage supply/Ground (GND) connection.
On vehicles equipped with "sunroof with solar cells", there is voltage generated by the sunroof solar cells at terminal - 6 - of connector - A - when sunroof is closed.
The Fresh Air Blower Control Module J126 is constantly monitored by the operating and display module, Climatronic Control Module J255. Any malfunctions occurring are stored in the DTC memory. The current status of the Fresh Air Blower V2 is displayed in the measuring value block (display group "018") → Read Measuring Value Block (function 08) .