B1835 – OBD-II DTC

OBD-II DTC B1835 – Door Unlock Disarm Output Circuit Open

DTC B1835 meaning

DTC B1835 refers to a diagnostic trouble code indicating an issue with the Door Unlock Disarm Output Circuit. This code is triggered when the vehicle’s onboard diagnostic system detects an open circuit in the door unlock disarm output, which is responsible for disabling the vehicle’s alarm system when the doors are unlocked.

DTC B1835 symptoms

Common symptoms associated with DTC B1835 may include:

• Inability to unlock the doors using the remote or key fob
• Alarm system not disarming when doors are unlocked
• Warning lights illuminated on the dashboard
• Possible issues with central locking system

DTC B1835 causes

Several factors can lead to the triggering of DTC B1835, including:

• Faulty door lock actuator
• Damaged or frayed wiring in the door unlock circuit
• Corroded connectors or terminals
• Malfunctioning body control module (BCM)
• Issues with the key fob or remote

DTC B1835 seriousness

DTC B1835 is considered a moderate issue. While it may not prevent the vehicle from operating, it can lead to security concerns, as the alarm system may not function properly. It is advisable to address this code promptly to ensure the vehicle’s security features are operational.

How to diagnose DTC B1835

To diagnose DTC B1835, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the B1835 code.
2. Inspect the door lock actuator for any visible damage or malfunction.
3. Check the wiring and connectors associated with the door unlock circuit for signs of wear or corrosion.
4. Test the body control module (BCM) for proper operation.
5. Verify the functionality of the key fob or remote.

How to fix DTC B1835 step-by-step instructions

To fix DTC B1835, follow these steps:

1. Repair or replace any damaged wiring or connectors in the door unlock circuit.
2. Replace the faulty door lock actuator if necessary.
3. Test and, if needed, reprogram the body control module (BCM).
4. Ensure the key fob or remote is functioning correctly replace the battery if needed.
5. Clear the DTC using an OBD-II scanner and test the system to ensure the issue is resolved.

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