B1560 – Door Lock Cylinder Circuit Open

The ODBII code B1560 indicates that there is an open circuit in the door lock cylinder, which means the vehicle’s system is not detecting the expected electrical signal from the door lock cylinder.

The severity of ODBII code B1560 is generally considered moderate.

Common Causes For: B1559 Door Lock Cylinder Circuit Failure

• Faulty door lock cylinder
• Damaged wiring or connectors
• Poor ground connection
• Malfunctioning door lock actuator
• Corroded terminals
• Broken or disconnected harness
• Faulty body control module (BCM)

Common misdiagnosis for B1560 Door Lock Cylinder Circuit Open

• Faulty door lock actuator
• Wiring issues or shorts in the door lock circuit
• Malfunctioning body control module (BCM)
• Defective keyless entry system
• Ignition switch problems
• Faulty door lock switch
• Issues with the vehicle’s security system

Common Troubleshooting Steps

When dealing with an OBD-II code B1560, which indicates a “Door Lock Cylinder Circuit Open,” there are several common troubleshooting steps you can follow to diagnose and potentially resolve the issue. Here’s a structured approach:

• Check the Vehicle’s Manual: Refer to the vehicle’s service manual for specific information related to the B1560 code, including wiring diagrams and component locations.
• Visual Inspection: **Wiring and Connectors: Inspect the wiring and connectors associated with the door lock cylinder circuit for any signs of damage, corrosion, or loose connections.
• **Door Lock Cylinder: Check the door lock cylinder itself for any physical damage or obstruction.
• Test the Door Lock Cylinder: Use a multimeter to test the door lock cylinder for continuity. If the circuit is open, it may indicate a faulty lock cylinder or wiring issue.
• Check for Faulty Components: **Door Lock Actuator: Test the door lock actuator for proper operation. A malfunctioning actuator can cause the circuit to appear open.
• **Body Control Module (BCM): The BCM controls the door lock functions. If it is malfunctioning, it may not send the correct signals to the door lock cylinder.
• Inspect Fuses and Relays: Check the fuses and relays associated with the door lock system. A blown fuse or faulty relay can interrupt the circuit.
• Scan for Additional Codes: Use an OBD-II scanner to check for any additional trouble codes that may provide more context or indicate related issues.
• Perform a Circuit Test: With the ignition on, use a multimeter to check for voltage at the door lock cylinder connector. If there is no voltage, trace the wiring back to the BCM or relevant control module.
• Repair or Replace Faulty Components: Based on your findings, repair or replace any damaged wiring, connectors, or components (like the door lock cylinder or actuator).
• Clear the Codes: After making repairs, clear the trouble codes using an OBD-II scanner and take the vehicle for a test drive to see if the code returns.
• Consult a Professional: If the issue persists after following these steps, it may be best to consult a professional mechanic or technician who has experience with your specific vehicle make and model.Additional Tips: – Always ensure that the vehicle’s battery is in good condition, as low voltage can sometimes cause erratic behavior in electronic systems. – If you are not comfortable performing these steps, consider seeking help from a qualified technician. By following these troubleshooting steps, you should be able to identify and resolve the issue related to the B1560 code.