B1371 – OBD-II DTC

OBD-II DTC B1371 – Illuminated Entry Relay Circuit Failure

DTC B1371 meaning

DTC B1371 refers to a fault in the Illuminated Entry Relay Circuit. This code indicates that there is a malfunction in the circuit responsible for controlling the illuminated entry feature, which typically activates the interior lights when the vehicle is unlocked or opened. The issue may stem from a failure in the relay, wiring, or related components.

DTC B1371 symptoms

Common symptoms associated with DTC B1371 may include:

• Interior lights not illuminating when doors are unlocked or opened
• Door locks not functioning properly
• Malfunctioning remote keyless entry system
• Dashboard warning lights illuminated

DTC B1371 causes

Several factors can lead to the triggering of DTC B1371, including:

• Faulty illuminated entry relay
• Damaged or corroded wiring in the circuit
• Defective door switches
• Issues with the Body Control Module (BCM)
• Short circuits or open circuits in the relay circuit

DTC B1371 seriousness

The seriousness of DTC B1371 can vary. While it may not affect the vehicle’s drivability, it can lead to inconvenience due to non-functioning interior lights and door locks. Additionally, it may indicate underlying electrical issues that could affect other systems in the vehicle, making it important to address the code promptly.

How to diagnose DTC B1371

To diagnose DTC B1371, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the B1371 code.
2. Inspect the illuminated entry relay for any visible damage or corrosion.
3. Check the wiring and connectors associated with the relay for continuity and signs of wear.
4. Test the door switches to ensure they are functioning correctly.
5. Examine the Body Control Module (BCM) for any faults or error codes.
6. Perform a continuity test on the relay circuit to identify any shorts or opens.

How to fix DTC B1371 step-by-step instructions

To fix DTC B1371, follow these steps:

1. Replace the faulty illuminated entry relay if it is determined to be defective.
2. Repair or replace any damaged wiring or connectors found during the inspection.
3. Replace any malfunctioning door switches.
4. If the BCM is faulty, consider reprogramming or replacing it as necessary.
5. Clear the DTC using an OBD-II scanner after repairs are made.
6. Test the illuminated entry system to ensure proper functionality.

How to erase DTC B1371

To erase DTC B1371, 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 DTC menu on the scanner and select the option to clear or erase codes.
4. Confirm the action and wait for the scanner to complete the process.
5. Disconnect the scanner and start the vehicle to ensure the code does not reappear.

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