B2560 – OBD-II DTC

OBD-II DTC B2560 – Aux A/C Blower Motor Relay Circuit Short to Ground

DTC B2560 meaning

DTC B2560 refers to a diagnostic trouble code indicating a short to ground in the auxiliary air conditioning blower motor relay circuit. This code is part of the On-Board Diagnostics II (OBD-II) system, which monitors various vehicle systems for faults. The auxiliary A/C blower motor is responsible for circulating air within the vehicle, and a short to ground can disrupt its operation.

DTC B2560 symptoms

Common symptoms associated with DTC B2560 may include:

• Inoperative auxiliary A/C blower motor
• Reduced airflow from the A/C system
• Increased cabin temperature
• Possible blown fuses related to the A/C system
• Illuminated check engine light or A/C warning light

DTC B2560 causes

Several factors can lead to the occurrence of DTC B2560, including:

• Wiring issues such as frayed or damaged wires
• Faulty auxiliary A/C blower motor relay
• Short circuits in the relay circuit
• Defective auxiliary A/C blower motor
• Corrosion or poor connections in the electrical system

DTC B2560 seriousness

The seriousness of DTC B2560 can vary based on the symptoms experienced. While it may not pose an immediate safety risk, it can lead to discomfort due to inadequate cabin cooling. Additionally, ignoring this code may result in further electrical issues or damage to the A/C system components.

How to diagnose DTC B2560

To diagnose DTC B2560, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the B2560 code.
2. Inspect the wiring and connectors related to the auxiliary A/C blower motor relay for damage or corrosion.
3. Check the auxiliary A/C blower motor relay for proper operation using a multimeter.
4. Test the auxiliary A/C blower motor for functionality.
5. Look for any blown fuses in the A/C circuit.

How to fix DTC B2560 step-by-step instructions

To fix DTC B2560, follow these steps:

1. Repair or replace any damaged wiring or connectors found during diagnosis.
2. Replace the faulty auxiliary A/C blower motor relay if it is not functioning correctly.
3. Test and replace the auxiliary A/C blower motor if it is defective.
4. Replace any blown fuses related to the A/C system.
5. Clear the DTC using an OBD-II scanner and test the system to ensure proper operation.

How to erase DTC B2560

To erase DTC B2560, follow these steps:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port.
2. Turn the ignition key to the “On” position without starting the engine.
3. Access the trouble codes menu on the scanner.
4. Select the option to clear or erase trouble codes.
5. Confirm the action and wait for the scanner to indicate that the codes have been cleared.

Recommended tools for OBD-II diagnostics

Explore our expert picks: The Best OBD2 Scanners for 2025

Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter

Some of the links on this page may be affiliate links, which means we may earn a small commission if you make a purchase. This helps us keep our DTC database up to date and provide valuable content for free. We only recommend products that we have tested and believe to be the best in their class.