B2474 – OBD-II DTC

OBD-II DTC B2474 – Passenger Door Lock Switch Circuit Shorted to Ground

DTC B2474 meaning

DTC B2474 refers to a diagnostic trouble code indicating a short circuit in the passenger door lock switch circuit to ground. This code is part of the On-Board Diagnostics II (OBD-II) system, which monitors various vehicle components and systems for faults. When the system detects that the passenger door lock switch is continuously grounded, it triggers this code, signaling a potential issue with the switch or its wiring.

DTC B2474 symptoms

Common symptoms associated with DTC B2474 may include:

• Passenger door lock not functioning properly.
• Inability to lock or unlock the passenger door using the switch.
• Illumination of the warning light on the dashboard.
• Other door lock functions may be affected.

DTC B2474 causes

Several factors can lead to the occurrence of DTC B2474, including:

• Faulty passenger door lock switch.
• Damaged or frayed wiring in the door lock circuit.
• Corrosion or poor connections in the wiring harness.
• Issues with the body control module (BCM) that manages door lock functions.

DTC B2474 seriousness

The seriousness of DTC B2474 can vary. While it may not pose an immediate safety risk, it can lead to inconvenience due to malfunctioning door locks. Additionally, if left unaddressed, it may indicate underlying electrical issues that could affect other systems in the vehicle.

How to diagnose DTC B2474

To diagnose DTC B2474, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the B2474 code.
2. Inspect the passenger door lock switch for visible damage or wear.
3. Check the wiring and connectors for signs of corrosion or fraying.
4. Test the continuity of the wiring between the switch and the BCM.
5. Use a multimeter to check for proper voltage and ground at the switch.
6. Replace the switch if it is found to be faulty.
7. Clear the DTC and test the door lock operation.

How to fix DTC B2474 step-by-step instructions

To fix DTC B2474, follow these step-by-step instructions:

1. Disconnect the vehicle’s battery to ensure safety while working on electrical components.
2. Remove the door panel to access the passenger door lock switch.
3. Inspect the door lock switch for any visible damage or malfunction.
4. Check the wiring harness for any signs of damage, corrosion, or loose connections.
5. If the switch is faulty, replace it with a new one.
6. Repair any damaged wiring or connectors as necessary.
7. Reassemble the door panel and reconnect the battery.
8. Use an OBD-II scanner to clear the DTC and test the door lock functionality.

How to erase DTC B2474

To erase DTC B2474, 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 trouble codes section on the scanner.
4. Select the option to clear or erase the codes.
5. Confirm the action and wait for the scanner to complete the process.
6. Disconnect the scanner and start the vehicle to ensure the code does not reappear.

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