B1607 – Illuminated Entry Input Circuit Failure

The ODBII code B1607 indicates a malfunction in the illuminated entry input circuit, which may involve issues with the door switches or related wiring that control the interior lights when a door is opened.

The severity of ODBII code B1607 is generally considered low.

Common Causes For: B1606 Lamp Anti-Theft Indicator Circuit Short To Ground

• Faulty door switch
• Damaged wiring or connectors
• Short circuit in the circuit
• Open circuit in the circuit
• Malfunctioning body control module (BCM)
• Corroded terminals
• Faulty keyless entry system
• Defective interior lights

Common misdiagnosis for B1607 Illuminated Entry Input Circuit Failure

• Faulty door switch
• Wiring issues
• Body control module (BCM) failure
• Malfunctioning key fob
• Battery issues
• Ground connection problems
• Faulty interior lights
• Incorrectly programmed BCM settings

Common Troubleshooting Steps

The OBD-II code B1607 refers to an “Illuminated Entry Input Circuit Failure.” This code typically indicates a problem with the vehicle’s interior lighting system, specifically related to the circuits that control the illuminated entry feature. Here are some common troubleshooting steps to diagnose and resolve this issue:

• Check for Additional Codes: Use an OBD-II scanner to check for any other related trouble codes. This can provide more context and help identify if there are multiple issues.
• Inspect the Wiring and Connectors: Visually inspect the wiring and connectors associated with the illuminated entry system. Look for signs of damage, corrosion, or loose connections.
• Pay special attention to the door switches, as they are often involved in the illuminated entry system.
• Test the Door Switches: Manually test the door switches to ensure they are functioning correctly. You can do this by using a multimeter to check for continuity when the door is opened and closed.
• If a door switch is faulty, it may need to be replaced.
• Check the Body Control Module (BCM): The BCM is responsible for controlling various electrical functions, including the illuminated entry system. Check for any faults in the BCM.
• If necessary, reprogram or replace the BCM, but ensure that other potential issues are ruled out first.
• Inspect the Interior Lighting System: Check the bulbs and fixtures in the interior lighting system to ensure they are functioning properly. Replace any burnt-out bulbs.
• Ensure that the interior lights are not stuck in the “off” position due to a faulty switch.
• Examine the Fuses: Check the fuses related to the interior lighting and illuminated entry system. Replace any blown fuses and ensure that the fuse box is in good condition.
• Test the System with a Scan Tool: Use a professional scan tool to monitor the illuminated entry system while operating the doors. This can help identify if the system is receiving the correct signals.
• Clear the Codes and Test Drive: After performing the above checks and repairs, clear the trouble codes using the OBD-II scanner.
• Take the vehicle for a test drive to see if the code reappears. Monitor the illuminated entry system to ensure it is functioning correctly.
• Consult a Professional: If the issue persists after performing these steps, it may be necessary to consult a professional mechanic or technician who has experience with your specific vehicle make and model. By following these troubleshooting steps, you should be able to identify and resolve the issue related to the B1607 code. Always refer to the vehicle’s service manual for specific information related to your model.