B1704 – OBD-II DTC

OBD-II DTC B1704 – Seat Driver Recline Forward Switch Circuit Short To Ground

DTC B1704 meaning

DTC B1704 refers to a diagnostic trouble code indicating a short circuit to ground in the driver recline forward switch circuit. This code is part of the On-Board Diagnostics II (OBD-II) system, which monitors various vehicle components and systems for faults. The driver recline forward switch is responsible for adjusting the seat’s recline angle, and a short to ground can disrupt its normal operation.

DTC B1704 symptoms

Common symptoms associated with DTC B1704 may include:

• Inability to adjust the driver’s seat recline forward.
• Warning lights illuminated on the dashboard, particularly the airbag or seatbelt warning lights.
• Intermittent or erratic operation of the seat adjustment controls.
• Potential issues with other electrical components in the vehicle.

DTC B1704 causes

Several factors can lead to the occurrence of DTC B1704, including:

• A damaged or frayed wire in the driver recline forward switch circuit.
• Corrosion or poor connections at the switch or related connectors.
• Faulty driver recline forward switch.
• Issues with the vehicle’s body control module (BCM) or other related electronic control units.

DTC B1704 seriousness

DTC B1704 is considered a moderate issue. While it may not affect the vehicle’s drivability, it can impact the functionality of the driver’s seat adjustment, which is essential for comfort and safety. Additionally, the presence of this code may trigger warning lights, which could distract the driver or indicate other underlying issues.

How to diagnose DTC B1704

To diagnose DTC B1704, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the B1704 code.
2. Inspect the driver recline forward switch and its wiring for visible damage or corrosion.
3. Check the connectors for secure connections and signs of wear.
4. Test the driver recline forward switch using a multimeter to ensure it operates correctly.
5. Examine the body control module (BCM) for any faults or issues.
6. Clear the code and perform a test drive to see if the code returns.

How to fix DTC B1704 step-by-step instructions

To fix DTC B1704, 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 in the driver recline forward switch circuit.
3. If the switch is faulty, replace it with a new one.
4. Reconnect all connectors securely and ensure there is no corrosion.
5. Reconnect the vehicle’s battery.
6. Use an OBD-II scanner to clear the DTC and check for any reoccurrence of the code.

How to erase DTC B1704

To erase DTC B1704, 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. Navigate to the “Erase Codes” or “Clear Codes” option on the scanner.
4. Confirm the action to clear the DTC from the vehicle’s memory.
5. Disconnect the scanner and perform a test drive to ensure the code does not return.

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