B1524 – Keyless Entry Circuit Open

The ODBII code B1524 indicates that there is an open circuit in the keyless entry system, meaning the system is not receiving the expected signal or power from the keyless entry components.

The severity of ODBII code B1524 Keyless Entry Circuit Open is generally considered moderate.

Common Causes For: B1523 Keyless Entry Circuit Failure

• Faulty keyless entry module
• Open or shorted wiring
• Corroded connectors
• Blown fuse
• Malfunctioning key fob
• Weak or dead key fob battery
• Poor ground connection

Common misdiagnosis for B1524 Keyless Entry Circuit Open

• Faulty key fob
• Dead battery in key fob
• Malfunctioning door lock actuator
• Wiring issues or shorts in the circuit
• Faulty body control module (BCM)
• Issues with the vehicle’s ignition system
• Problems with the central locking system
• Faulty door switch or sensor

Common Troubleshooting Steps

The OBD-II code B1524 indicates a problem with the keyless entry circuit, specifically that there is an open circuit. This can be caused by various issues, including wiring problems, faulty components, or issues with the keyless entry system itself. Here are some common troubleshooting steps to diagnose and resolve the issue:

• Check the Vehicle’s Battery:
• Ensure that the vehicle’s battery is fully charged and in good condition. A weak battery can cause various electrical issues.
• Inspect Fuses:
• Check the fuses related to the keyless entry system. A blown fuse can interrupt the circuit and trigger the B1524 code.
• Examine Wiring and Connectors:
• Inspect the wiring harness and connectors associated with the keyless entry system. Look for signs of damage, corrosion, or loose connections. Pay special attention to any areas where the wiring may be exposed to wear or abrasion.
• Test the Keyless Entry Module:
• If applicable, test the keyless entry module for proper operation. This may involve using a multimeter to check for continuity and proper voltage at the module’s connectors.
• Check the Key Fob:
• Ensure that the key fob is functioning correctly. Replace the battery in the key fob if necessary and test it to see if it communicates with the vehicle.
• 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.
• Inspect the Antenna:
• If the vehicle uses a keyless entry antenna, check it for damage or disconnection. The antenna is crucial for receiving signals from the key fob.
• Perform a System Reset:
• Sometimes, clearing the code and resetting the system can resolve temporary glitches. After clearing the code, take the vehicle for a test drive to see if the code returns.
• Consult Wiring Diagrams:
• Refer to the vehicle’s service manual for wiring diagrams to trace the keyless entry circuit and identify any potential issues.
• Seek Professional Help:
• If the issue persists after performing the above steps, it may be necessary to consult a professional mechanic or automotive technician who has experience with keyless entry systems. By following these troubleshooting steps, you should be able to identify and resolve the issue causing the B1524 code.