B2564 Code - Auxiliary Blower Motor Speed Relay 2 Circuit Open/Short To Ground
Quick Answer
Under normal operation, ground for the blower motor is provided through the circuit from the blower motor resistor (LO and MED-LO) and the blower motor speed relay 1 (MED-HI and HI). Common causes include Faulty Auxiliary Blower Motor Speed Relay 2, Auxiliary Blower Motor Speed Relay 2 harness is open or shorted, Auxiliary Blower Motor Speed Relay 2 circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- B2564 indicates Auxiliary Blower Motor Speed Relay 2 Circuit Open/Short To Ground.
- Common causes
- Common causes include Faulty Auxiliary Blower Motor Speed Relay 2, Auxiliary Blower Motor Speed Relay 2 harness is open or shorted, Auxiliary Blower Motor Speed Relay 2 circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code B2564 Description
In LO, ground for the blower motor is provided through the blower motor resistor.
In MED-LO, blower motor speed relay 2 is grounded by the SJB through the circuit. Blower motor ground circuit is connected through one half of the blower motor resistor to the circuit. The circuit is connected through the blower motor speed relay 2 to the blower motor resistor ground circuit.
In MED-HI, blower motor speed relay 1 is grounded by the SJB through the circuit. Blower motor ground circuit is connected through blower motor speed relay 2 to the circuit. The circuit is connected through one half of the blower motor resistor to the blower motor resistor ground circuit.
In HI, blower motor speed relays 1 and 2 are grounded by the SJB through the circuit. Blower motor ground circuit 515 (OG/RD) is connected through the blower motor speed relay 1 to the circuit. The circuit is connected through the blower motor speed relay 2 to the blower motor resistor ground circuit.
What are the Possible Causes of the DTC B2564?
- Faulty Auxiliary Blower Motor Speed Relay 2
- Auxiliary Blower Motor Speed Relay 2 harness is open or shorted
- Auxiliary Blower Motor Speed Relay 2 circuit poor electrical connection
- Faulty Blower Motor Resistor
- Faulty Smart Junction Box (SJB)
How to Fix the DTC B2564?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B2564 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Information for Specific Makes
- B2564 Ford — Auxiliary Blower Motor Speed Relay 2 Circuit Open/Short To Ground
- B2564 Lincoln — Auxiliary Blower Motor Speed Relay 2 Circuit Open/Short To Ground
- B2564 Mercury — Auxiliary Blower Motor Speed Relay 2 Circuit Open/Short To Ground
Frequently Asked Questions about B2564 Code
What does OBDII code B2564 mean?
OBDII code B2564 indicates a problem with the Auxiliary Blower Motor Speed Relay 2 circuit, specifically an open circuit or a short to ground condition.
What are common symptoms of code B2564?
Common symptoms include the auxiliary blower motor not operating, unusual noises from the motor, or the blower motor running at an incorrect speed.
What can cause the B2564 code to trigger?
Causes may include a faulty auxiliary blower motor, a defective relay, damaged wiring or connectors, or issues with the vehicle's control module.
How can I diagnose the B2564 code?
To diagnose B2564, inspect the auxiliary blower motor, relay, and associated wiring for damage. Use a multimeter to check for continuity and proper voltage in the circuit.
What is the first step in repairing the B2564 code?
The first step is to visually inspect the wiring and connectors for any signs of wear, corrosion, or disconnection, followed by testing the relay and blower motor.
Can I drive my vehicle with the B2564 code?
While you can drive the vehicle, the lack of proper auxiliary blower motor function may affect comfort, especially in extreme weather conditions, so it's advisable to address the issue soon.
Will clearing the B2564 code fix the problem?
No, clearing the code will not fix the underlying issue. It is crucial to diagnose and repair the fault before clearing the code to ensure it does not return.
How much does it typically cost to fix the B2564 code?
Repair costs can vary widely, but typical expenses may range from $100 to $500, depending on whether the issue is a simple wiring repair or a more complex component replacement.
Can I fix the B2564 code myself?
Yes, if you have basic automotive knowledge and tools, you can troubleshoot and repair issues related to the B2564 code, such as replacing a relay or repairing wiring.
What should I do if the B2564 code keeps returning after repairs?
If the code persists, double-check all connections, ensure all components are functioning properly, and consider consulting a professional mechanic for a more in-depth diagnosis.
Discuss the causes and fixes for B2564 OBDII Code
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