how to fix the AC not blowing cold air in my Toyota Tacoma N300 (2016-Present)?

Solution

1. Preparation

• Gather tools and parts: OBD-II scanner, manifold gauge set, refrigerant, basic hand tools, safety glasses, gloves.
• Ensure the vehicle is parked on a level surface and the engine is off.

2. Check and Replace A/C Fuse

• Locate the fuse box (refer to the owner's manual) and find the A/C fuse.
• Remove the fuse using a fuse puller and inspect it for damage.
• If blown, replace it with a fuse of the same amperage.

3. Recharge Refrigerant

• Connect the manifold gauge set to the A/C service ports (low and high side).
• Check the pressure readings; if low, proceed to recharge.
• Use an appropriate refrigerant (usually R-134a for this model) and follow the manufacturer’s guidelines to fill the system to the correct level.

4. Inspect and Replace A/C Compressor (if necessary)

• If the compressor is not engaging, check for power using a multimeter at the compressor connector.
• If there is no power, trace wiring back to the A/C relay and control module.
• If the compressor is damaged or making noise, replace it:
  • Remove the drive belt.
  • Disconnect the refrigerant lines from the compressor.
  • Remove the mounting bolts and take out the old compressor.
  • Install the new compressor in reverse order, and ensure all connections are secure.

5. Test the A/C System

• Start the vehicle and turn on the A/C to maximum.
• Monitor the pressure readings with the manifold gauge to ensure proper operation.
• Check for cold air from the vents and any unusual noises.