B1374 – OBD-II DTC

OBD-II DTC B1374 – Illuminated Entry Relay Short To Ground

DTC B1374 meaning

DTC B1374 refers to a diagnostic trouble code indicating a problem with the illuminated entry relay, specifically a short to ground condition. This code is part of the On-Board Diagnostics II (OBD-II) system, which monitors various vehicle components and systems for faults. The illuminated entry relay is responsible for controlling the interior lights and other related functions when the vehicle is unlocked or opened.

DTC B1374 symptoms

Common symptoms associated with DTC B1374 may include:

• Interior lights not functioning properly
• Door locks not responding as expected
• Malfunctioning remote entry system
• Battery drain due to lights staying on

DTC B1374 causes

Several factors can lead to the triggering of DTC B1374, including:

• Short circuit in the wiring harness
• Faulty illuminated entry relay
• Corroded or damaged connectors
• Issues with the body control module (BCM)

DTC B1374 seriousness

DTC B1374 is considered a moderate issue. While it may not immediately affect the vehicle’s drivability, it can lead to other problems such as battery drain or malfunctioning entry systems. Addressing this code promptly is advisable to prevent further complications.

How to diagnose DTC B1374

To diagnose DTC B1374, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the code.
2. Inspect the wiring and connectors related to the illuminated entry relay for any visible damage or corrosion.
3. Test the illuminated entry relay for proper operation using a multimeter.
4. Check for any additional codes that may provide more context to the issue.
5. Examine the body control module for faults or malfunctions.

How to fix DTC B1374 step-by-step instructions

To fix DTC B1374, follow these steps:

1. Disconnect the vehicle’s battery to ensure safety while working on electrical components.
2. Inspect and repair any damaged wiring or connectors related to the illuminated entry relay.
3. Replace the illuminated entry relay if it is found to be faulty.
4. Reconnect the battery and clear the DTC using an OBD-II scanner.
5. Test the system to ensure that the interior lights and entry functions operate correctly.

How to erase DTC B1374

To erase DTC B1374, follow these steps:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port.
2. Turn on the ignition without starting the engine.
3. Navigate to the option to clear or erase trouble codes on the scanner.
4. Confirm the action to erase the codes.
5. Disconnect the scanner and start the vehicle to verify that the code does not reappear.

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