B1314 – Battery Saver Relay Coil Circuit Open

The ODBII code B1314 indicates that there is an open circuit in the battery saver relay coil, which can prevent the relay from functioning properly and may affect the vehicle’s battery management system.

The severity of ODBII code B1314 is moderate.

Common Causes For: B1313 Battery Saver Relay Coil Circuit Failure

• Faulty battery saver relay
• Open circuit in the relay coil wiring
• Corroded or loose electrical connections
• Faulty engine control module (ECM)
• Blown fuse related to the battery saver relay
• Short circuit in the wiring harness
• Faulty ignition switch

Common misdiagnosis for B1314 Battery Saver Relay Coil Circuit Open

• Faulty battery
• Bad alternator
• Defective battery saver relay
• Wiring issues or shorts
• Faulty body control module (BCM)
• Corroded connectors
• Incorrectly installed aftermarket accessories

Common Troubleshooting Steps

The OBD-II code B1314 indicates a problem with the battery saver relay coil circuit, specifically that the circuit is open. This can lead to issues with the vehicle’s electrical system, particularly in relation to the battery saver feature, which is designed to prevent battery drain when the vehicle is off. Here are some common troubleshooting steps to diagnose and resolve this issue:

• Check the Battery and Connections: **Inspect the Battery:** Ensure the battery is fully charged and in good condition.
• **Check Battery Connections:** Look for corrosion or loose connections at the battery terminals. Clean and tighten as necessary.
• Inspect the Battery Saver Relay: **Locate the Relay:** Find the battery saver relay in the vehicle’s fuse box or relay panel.
• **Test the Relay:** Swap the relay with a similar one (if available) to see if the problem persists. You can also use a multimeter to check for continuity.
• Examine the Wiring and Connectors: **Visual Inspection:** Look for damaged, frayed, or corroded wires in the battery saver relay circuit.
• **Check Connectors:** Ensure all connectors are secure and free of corrosion. Disconnect and reconnect them to ensure a good connection.
• Test the Relay Circuit: **Use a Multimeter:** Check for voltage at the relay terminals with the ignition on. You should see battery voltage at the relay coil terminals.
• **Check for Ground:** Ensure that the relay has a proper ground connection. If the ground is faulty, it can cause an open circuit.
• Inspect the Fuse: **Check the Fuse:** Locate the fuse associated with the battery saver relay and inspect it for continuity. Replace it if it is blown.
• Scan for Additional Codes: **Use a Diagnostic Scanner:** Check for any other OBD-II codes that may be present. Sometimes, multiple codes can point to a larger issue.
• Check for Short Circuits: **Inspect for Shorts:** Look for any signs of short circuits in the wiring that could cause the relay coil circuit to open.
• Consult Wiring Diagrams: **Refer to Service Manual:** Use the vehicle’s service manual to understand the wiring diagram for the battery saver relay circuit. This can help identify any specific components that may be causing the issue.
• Perform a System Reset: **Clear Codes:** After performing repairs, clear the OBD-II codes and see if the code returns after a test drive.
• Seek Professional Help: If the issue persists after performing these steps, it may be necessary to consult a professional mechanic or technician who can perform more advanced diagnostics. By following these troubleshooting steps, you should be able to identify and resolve the issue related to the B1314 code. Always ensure safety precautions are taken when working on a vehicle’s electrical system.