B1523 – Keyless Entry Circuit Failure

The ODBII code B1523 indicates a malfunction in the keyless entry circuit, which may involve issues with the key fob, receiver, or related wiring and components.

The severity of ODBII code B1523 is generally considered moderate.

Common Causes For: B1522 Hood Switch Circuit Short To Ground

• Faulty keyless entry module
• Damaged wiring or connectors
• Weak or dead key fob battery
• Malfunctioning door lock actuators
• Corroded or loose connections
• Software issues or programming errors
• Interference from other electronic devices
• Faulty ignition switch

Common misdiagnosis for B1523 Keyless Entry Circuit Failure

• Faulty key fob
• Weak or dead key fob battery
• Malfunctioning door lock actuators
• Wiring issues or shorts in the keyless entry circuit
• Faulty body control module (BCM)
• Incorrectly programmed key fob
• Issues with the vehicle’s security system
• Problems with the antenna or receiver for the keyless entry system

Common Troubleshooting Steps

The OBD-II code B1523 indicates a “Keyless Entry Circuit Failure.” This code typically relates to issues with the keyless entry system in a vehicle, which can be caused by various factors. Here are some common troubleshooting steps to diagnose and potentially resolve the issue:

• Check the Key Fob Battery:
• Ensure that the battery in the key fob is not dead. Replace the battery if necessary and test the key fob again.
• Inspect the Key Fob:
• Look for any physical damage to the key fob. If it is damaged, it may need to be replaced.
• Check for Interference:
• Ensure that there are no electronic devices or other key fobs nearby that could be causing interference with the keyless entry system.
• Inspect the Vehicle’s Antenna:
• The keyless entry system typically uses an antenna to receive signals from the key fob. Check the antenna for any damage or disconnection.
• Examine Wiring and Connectors:
• Inspect the wiring and connectors associated with the keyless entry system for any signs of damage, corrosion, or loose connections.
• Check the Keyless Entry Module:
• The keyless entry module (or body control module) may be malfunctioning. Check for any fault codes related to this module and consider testing or replacing it if necessary.
• 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 System Reset:
• Sometimes, resetting the vehicle’s computer can clear temporary faults. Disconnect the battery for a few minutes, then reconnect it and see if the code reappears.
• Consult the Vehicle’s Service Manual:
• Refer to the specific service manual for your vehicle make and model for any additional troubleshooting steps or specifications related to the keyless entry system.
• Seek Professional Help:
• If the issue persists after performing these steps, it may be best to consult a professional mechanic or an automotive technician who specializes in electrical systems. By following these steps, you should be able to identify and potentially resolve the issue related to the B1523 code.