what is wrong if my Volkswagen Golf MK7.5 (2020-Present) has a B1484 code

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the vehicle's battery to prevent electrical shorts.
• Ensure the vehicle is on a level surface and secure it with wheel chocks.

2. Inspect Fuses and Relays

• Locate the fuse box and refer to the owner's manual for the A/C system fuse location.
• Remove the A/C fuse and visually inspect it for continuity.
• If the fuse is blown, replace it with a fuse of the same amperage.
• Check the corresponding relays and replace if faulty.

3. Check A/C Compressor

• Reconnect the battery and start the engine.
• Use a multimeter to check voltage at the A/C compressor connector while engaging the A/C.
• If no voltage is detected, trace back to the climate control unit for faults.
• If voltage is present but the compressor does not engage, replace the compressor.

4. Inspect Refrigerant Levels

• Connect a refrigerant pressure gauge to the A/C service ports.
• Check the low and high-side pressure readings against manufacturer specifications.
• If low, recover the refrigerant, repair any leaks found, and recharge the system with the correct type and amount of refrigerant.

5. Repair Wiring and Connectors

• Visually inspect all wiring and connectors leading to the climate control unit.
• Repair or replace any damaged wires or corroded connectors.
• Ensure all connections are secure and free of debris.

6. Reset and Test

• After completing repairs, reset the climate control unit using the OBD-II scanner.
• Test the A/C system under various conditions to ensure proper operation.
• Monitor for reoccurrence of the B1484 code.