B1407 – OBD-II DTC

OBD-II DTC B1407 – Driver Power Window Up Circuit Open

DTC B1407 meaning

DTC B1407 refers to a diagnostic trouble code indicating an issue with the driver power window up circuit. Specifically, it signifies that the circuit responsible for raising the driver’s side power window is open, meaning there is a break in the electrical path that prevents the window from functioning properly.

DTC B1407 symptoms

Common symptoms associated with DTC B1407 may include:

• Driver’s side power window not responding when the switch is activated.
• Window may only operate in the down direction but not up.
• Intermittent operation of the power window.
• Other electrical components in the driver’s door may also malfunction.

DTC B1407 causes

Several factors can lead to the occurrence of DTC B1407, including:

• Open or damaged wiring in the power window circuit.
• Faulty power window switch.
• Defective power window motor.
• Issues with the vehicle’s body control module (BCM).
• Corrosion or poor connections in the electrical connectors.

DTC B1407 seriousness

DTC B1407 is considered a moderate issue. While it may not affect the overall drivability of the vehicle, it can lead to safety concerns if the driver is unable to close the window in adverse weather conditions or emergencies. It is advisable to address this issue promptly to ensure proper functionality of the power window system.

How to diagnose DTC B1407

To diagnose DTC B1407, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the B1407 code.
2. Inspect the power window switch for any visible damage or wear.
3. Check the wiring and connectors in the power window circuit for breaks or corrosion.
4. Test the power window motor for functionality.
5. Examine the body control module for any faults or issues.

How to fix DTC B1407 step-by-step instructions

To fix DTC B1407, follow these steps:

1. Disconnect the vehicle’s battery to ensure safety while working on electrical components.
2. Inspect and repair any damaged wiring in the power window circuit.
3. Replace the power window switch if it is found to be faulty.
4. Test and replace the power window motor if it is not functioning correctly.
5. Check and clean any corroded connectors to ensure good electrical contact.
6. Reconnect the battery and clear the DTC using an OBD-II scanner.
7. Test the power window operation to confirm the issue is resolved.

How to erase DTC B1407

To erase DTC B1407, 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 DTC.
5. Disconnect the scanner and start the vehicle to ensure the code does not reappear.

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