B1359 – OBD-II DTC

OBD-II DTC B1359 – Ignition Run/Acc Circuit Failure

DTC B1359 meaning

DTC B1359 refers to a fault in the Ignition Run/Acc circuit. This diagnostic trouble code indicates that the vehicle’s onboard diagnostic system has detected an issue with the circuit responsible for powering various components when the ignition is in the “Run” or “Accessory” position. This can affect the operation of systems such as the radio, power windows, and other electronic accessories.

DTC B1359 symptoms

Common symptoms associated with DTC B1359 may include:

• Inability to start the vehicle
• Electrical accessories not functioning
• Warning lights illuminated on the dashboard
• Intermittent power loss to various systems

DTC B1359 causes

Several factors can lead to the triggering of DTC B1359, including:

• Faulty ignition switch
• Wiring issues, such as shorts or open circuits
• Corroded or loose connectors
• Defective body control module (BCM)
• Battery or charging system problems

DTC B1359 seriousness

DTC B1359 can be considered serious as it may prevent the vehicle from starting or cause electrical components to malfunction. This can lead to safety concerns, especially if critical systems are affected. It is advisable to address this code promptly to ensure reliable vehicle operation.

How to diagnose DTC B1359

To diagnose DTC B1359, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the code.
2. Inspect the ignition switch for proper operation.
3. Check the wiring and connectors for damage or corrosion.
4. Test the battery and charging system to ensure they are functioning correctly.
5. Examine the body control module for faults.

How to fix DTC B1359 step-by-step instructions

To fix DTC B1359, follow these steps:

1. Repair or replace any damaged wiring or connectors found during diagnosis.
2. If the ignition switch is faulty, replace it with a new one.
3. Ensure all connections are clean and secure.
4. If the body control module is defective, consider replacing it.
5. After repairs, clear the DTC using an OBD-II scanner and test drive the vehicle to ensure the issue is resolved.

How to erase DTC B1359

To erase DTC B1359, follow these steps:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port.
2. Turn the ignition to the “On” position without starting the engine.
3. Access the scanner’s menu and select the option to clear or erase trouble codes.
4. Confirm the action and wait for the scanner to complete the process.
5. Disconnect the scanner and start the vehicle to check if the code reappears.

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