B1624 – OBD-II DTC

OBD-II DTC B1624 – Lamp Keypad Output Open Circuit

DTC B1624 meaning

DTC B1624 refers to a diagnostic trouble code indicating an open circuit in the lamp keypad output circuit. This code is typically associated with the vehicle’s body control module (BCM) and is related to the operation of the keypad that controls various lighting functions, such as interior lights or exterior lamps.

DTC B1624 symptoms

Common symptoms associated with DTC B1624 may include:

• Inoperative lamp keypad functions
• Illumination of the warning light on the dashboard
• Failure of certain lights to turn on or off
• Erratic behavior of lighting systems

DTC B1624 causes

The causes of DTC B1624 can vary, but typical reasons include:

• Faulty lamp keypad or switch
• Damaged wiring or connectors in the keypad circuit
• Defective body control module (BCM)
• Corrosion or poor connections in the circuit

DTC B1624 seriousness

DTC B1624 is considered a moderate issue. While it may not affect the vehicle’s drivability, it can lead to safety concerns due to inoperative lighting functions. It is advisable to address this code promptly to ensure all lighting systems function correctly.

How to diagnose DTC B1624

To diagnose DTC B1624, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the code.
2. Inspect the lamp keypad and associated wiring for visible damage.
3. Check the continuity of the wiring between the keypad and the BCM.
4. Test the lamp keypad for proper operation using a multimeter.
5. Examine the BCM for any fault codes or issues.

How to fix DTC B1624 step-by-step instructions

To fix DTC B1624, follow these steps:

1. Repair or replace any damaged wiring or connectors found during diagnosis.
2. If the lamp keypad is faulty, replace it with a new unit.
3. Ensure all connections are clean and secure, eliminating any corrosion.
4. If the BCM is determined to be defective, consider replacing it.
5. Clear the DTC using an OBD-II scanner and test the system to ensure the issue is resolved.

How to erase DTC B1624

To erase DTC B1624, 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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