Test Step 3

Test Step 3

Voltage supply and wire connection to the fresh air blower control module (J126) and to the fresh air blower (V2)

• Test step 3.1 check the voltage supply to the fresh air blower (V2)

- Switch off ignition.

- Remove glove box.

- Disconnect connector - A - from the fresh air blower control module (J126) - B -.





- Measure voltage between terminal - 4 - and terminal - 3 - at connector - A -.

Specification: Approx. battery voltage

• If the voltage is less than the battery voltage, repair the voltage or ground connection according to the wiring diagram.

• In vehicles with the "sunroof with solar cells" option, the voltage generated by the solar cells of the sunroof is applied at contact - 6 - of connector- A - when the sunroof is closed.

• The fresh air blower control module (J126) is continuously monitored by the Climatronic control module ( J255) A/C control head. If a fault occurs, it is stored in the DTC memory. The current status of the fresh air blower (V2) is displayed in the measured value block (display group "018").