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.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSAUDI2007RS4 QUATTRO SEDAN (8EC) V8-4.2L (BNS)REPAIR AND DIAGNOSISHEATING AND AIR CONDITIONINGCONTROL MODULE HVACTESTING AND INSPECTIONCOMPONENT TESTS AND GENERAL DIAGNOSTICSCLIMATRONIC CONTROL MODULE A/C CONTROL HEAD ELECTRICAL TESTTEST STEP 3
2007 Audi RS4 Quattro Sedan (8EC) V8-4.2L (BNS)
Test Step 3
2007 Audi RS4 Quattro Sedan (8EC) V8-4.2L (BNS)SECTION 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").
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.