B1507 – OBD-II DTC

OBD-II DTC B1507 – Flash To Pass Switch Circuit Failure

DTC B1507 meaning

DTC B1507 refers to a fault in the Flash To Pass switch circuit, which is part of the vehicle’s lighting system. This diagnostic trouble code indicates that the vehicle’s onboard diagnostic system has detected an issue with the operation of the Flash To Pass switch, which is used to activate the high beam headlights temporarily. The code is specific to the circuit that connects the switch to the vehicle’s control module.

DTC B1507 symptoms

Common symptoms associated with DTC B1507 may include:

• High beam headlights not functioning properly.
• Inability to activate the Flash To Pass feature.
• Dashboard warning lights illuminated.
• Other lighting system malfunctions.

DTC B1507 causes

Several factors can lead to the triggering of DTC B1507, including:

• Faulty Flash To Pass switch.
• Wiring issues, such as shorts or open circuits in the switch circuit.
• Corrosion or poor connections in the electrical connectors.
• Faulty body control module (BCM) or other related control modules.

DTC B1507 seriousness

The seriousness of DTC B1507 can vary. While it may not pose an immediate safety risk, it can affect the functionality of the vehicle’s lighting system, which is crucial for safe driving, especially at night or in low visibility conditions. It is advisable to address this issue promptly to ensure proper operation of the vehicle’s lighting features.

How to diagnose DTC B1507

To diagnose DTC B1507, follow these steps:

1. Use an OBD-II scanner to confirm the presence of DTC B1507.
2. Inspect the Flash To Pass switch for physical damage or wear.
3. Check the wiring and connectors associated with the switch for signs of corrosion or damage.
4. Test the Flash To Pass switch using a multimeter to ensure it operates correctly.
5. Examine the body control module for any faults or issues.

How to fix DTC B1507 step-by-step instructions

To fix DTC B1507, follow these steps:

1. Replace the Flash To Pass switch if it is found to be faulty.
2. Repair or replace any damaged wiring or connectors in the circuit.
3. Clean any corroded connections to ensure good electrical contact.
4. Reprogram or replace the body control module if necessary.
5. Clear the DTC using an OBD-II scanner and test the system to ensure the issue is resolved.

How to erase DTC B1507

To erase DTC B1507, follow these steps:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port.
2. Turn on the vehicle’s ignition without starting the engine.
3. Access the diagnostic trouble codes menu on the scanner.
4. Select the option to clear or erase the codes.
5. Confirm the action and wait for the scanner to indicate that the codes have been cleared.
6. Disconnect the scanner and start the vehicle to verify that the code does not reappear.

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