B1314 Battery Saver Relay Coil Circuit Open

Definition

Common causes

• 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 misdiagnoses

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

Troubleshooting steps

1. 1. Check the Battery and Connections

   Inspect the Battery: Ensure the battery is fully charged and in good condition

2. 2. Check Battery Connections

   Look for corrosion or loose connections at the battery terminals. Clean and tighten as necessary

3. 3. Inspect the Battery Saver Relay

   Locate the Relay: Find the battery saver relay in the vehicle's fuse box or relay panel

4. 4. 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

5. 5. Examine the Wiring and Connectors

   Visual Inspection: Look for damaged, frayed, or corroded wires in the battery saver relay circuit

6. 6. Check Connectors

   Ensure all connectors are secure and free of corrosion. Disconnect and reconnect them to ensure a good connection

7. 7. 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

8. 8. Check for Ground

   Ensure that the relay has a proper ground connection. If the ground is faulty, it can cause an open circuit

9. 9. 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

10. 10. 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

11. 11. 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

12. 12. 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

13. 13. Perform a System Reset

    Clear Codes: After performing repairs, clear the OBD-II codes and see if the code returns after a test drive

14. 14. 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