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.
A/C Control Module And Air RECIRCULATION Door Motor, Checking Function
Special tools and workshop equipment required
- Test Box 105 Pin V.A.G 1598/42-1 and Test Adapter V.A.G 1598/47
- Voltage Tester V.A.G 1527 B
-- Remove the glove compartment. Refer to Removal and Installation .
-- Remove A/C Control Module -J301-, refer to HEATER AND A/C SYSTEM CONTROLS .
-- Connect the A/C control module to vehicle wiring harness via V.A.G 1598/47.
-- Connect V.A.G 1598/42-1 to V.A.G 1598/47.
-- Switch ignition on.
-- Turn rotary switch for air distribution -B- into air distribution to instrument panel vents position.
-- Fresh/recirculating air button -F- is not operated (fresh air mode, button indicator lamp does not light up).
-- Connect a V.A.G 1527 B to the V.A.G 1598/47 between terminals 9 and 10 (connector -C-).
-- Operate fresh/recirculating air button (button indicator lamp lights up).
-- Ground (GND) is applied at terminal 9 for a short time and B+ is applied at terminal 9 for a short time.
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.