How to Diagnose and Solve B2563 Aux A/C Blower Speed 2 Circuit Failure Issues

Introduction

If you’re experiencing issues with your car’s air conditioning system, specifically the blower speed, you may have encountered the B2563 Aux A/C Blower Speed 2 Circuit Failure code. This code indicates that there is a problem with the circuit that controls the blower motor’s second speed. In this article, we’ll discuss how to diagnose and solve this issue.

Step 1: Check the Blower Motor Resistor

The first step in diagnosing the B2563 code is to check the blower motor resistor. This component is responsible for controlling the blower motor’s speed. To check the resistor, locate it under the dashboard on the passenger side of the car. It will be connected to the blower motor and have several wires running to it.

Using a multimeter, check the resistance of the blower motor resistor. The resistance should be within the manufacturer’s specifications. If the resistance is outside of the acceptable range, replace the resistor.

Step 2: Check the Blower Motor Relay

If the blower motor resistor is functioning correctly, the next step is to check the blower motor relay. The relay is responsible for sending power to the blower motor. To check the relay, locate it in the fuse box under the hood of the car.

Using a multimeter, check the resistance of the blower motor relay. The resistance should be within the manufacturer’s specifications. If the resistance is outside of the acceptable range, replace the relay.

Step 3: Check the Wiring

If both the blower motor resistor and relay are functioning correctly, the next step is to check the wiring. Check all of the wiring that connects the blower motor, resistor, and relay. Look for any signs of damage, such as frayed wires or loose connections.

If you find any damaged wiring, repair or replace it as necessary. If the wiring appears to be in good condition, move on to the next step.

Step 4: Check the Blower Motor

If all of the previous steps have been completed and the issue still persists, the problem may be with the blower motor itself. To check the blower motor, disconnect it from the wiring harness and use a multimeter to check its resistance. The resistance should be within the manufacturer’s specifications. If the resistance is outside of the acceptable range, replace the blower motor.

Conclusion

Diagnosing and solving the B2563 Aux A/C Blower Speed 2 Circuit Failure code can be a daunting task, but by following these steps, you can identify and fix the issue. Remember to check the blower motor resistor, relay, wiring, and motor itself to ensure that everything is functioning correctly.

FAQs

1. Can I still use my car’s air conditioning if the blower motor is malfunctioning?

No, if the blower motor is malfunctioning, the air conditioning system will not work properly. It’s important to diagnose and fix the issue as soon as possible.

2. How often should I check my car’s air conditioning system?

It’s a good idea to have your car’s air conditioning system checked annually by a professional. However, if you notice any issues with the system, such as reduced airflow or strange noises, it’s important to have it checked immediately.

3. Can I fix the B2563 code myself?

While it is possible to diagnose and fix the B2563 code yourself, it’s important to have a basic understanding of car mechanics and electrical systems. If you’re not comfortable working on your car, it’s best to take it to a professional mechanic.