WOMS
B code body Medium severity

B1316 Battery Saver Relay Coil Circuit Short To Ground

The OBD2 code B1316 indicates a short circuit in the battery saver relay coil circuit, which can cause the relay to malfunction and affect the vehicle's electrical systems

Definition

The OBD2 code B1316 indicates a short circuit in the battery saver relay coil circuit, which can cause the relay to malfunction and affect the vehicle's electrical systems

Common causes

  • Shorted wiring or connectors
  • Faulty battery saver relay
  • Damaged or corroded ground connections
  • Malfunctioning body control module (BCM)
  • Electrical shorts in the vehicle's wiring harness
  • Faulty fuses or fuse box issues
  • Improperly installed aftermarket accessories

Common misdiagnoses

  • Faulty battery
  • Bad alternator
  • Defective battery saver relay
  • Wiring issues or shorts in the harness
  • Faulty fuses
  • Malfunctioning body control module (BCM)
  • Incorrectly diagnosed electrical issues
  • Grounding problems in the electrical system

Troubleshooting steps

  1. 1. Visual Inspection

    Check Wiring and Connectors: Inspect the wiring harness and connectors related to the battery saver relay for any signs of damage, fraying, or corrosion. Pay special attention to areas where the wiring may be exposed to heat or moisture

  2. 2. Inspect the Relay

    Check the battery saver relay itself for any signs of damage or corrosion

  3. 3. Test the Relay

    Swap the Relay: If possible, swap the battery saver relay with a similar relay in the vehicle to see if the problem persists. If the code clears, the relay may be faulty

  4. 4. Bench Test the Relay

    If you have the means, test the relay outside of the vehicle to ensure it operates correctly

  5. 5. Check for Shorts to Ground

    Use a Multimeter: With the vehicle off, use a multimeter to check for continuity between the relay coil circuit and ground. If there is continuity, there is likely a short to ground somewhere in the circuit

  6. 6. Inspect Ground Connections

    Ensure that all ground connections related to the battery saver relay are secure and free of corrosion

  7. 7. Check Power Supply

    Test Voltage: With the vehicle on, check the voltage at the relay coil terminals. Ensure that the relay is receiving the correct voltage as specified in the vehicle’s service manual

  8. 8. Check Fuses

    Inspect any fuses related to the battery saver relay circuit to ensure they are not blown

  9. 9. Scan for Additional Codes

    Check for Other Codes: Use an OBD-II scanner to check for any additional trouble codes that may provide more context or indicate related issues

  10. 10. Inspect Related Components

    Check for Other Faulty Components: Sometimes, other components in the circuit can cause issues. Inspect any associated sensors or modules that may be linked to the battery saver relay

  11. 11. Consult Wiring Diagrams

    Refer to Service Manual: Use the vehicle’s service manual to refer to wiring diagrams for the battery saver relay circuit. This can help identify other components that may be involved in the circuit

  12. 12. Clear Codes and Test Drive

    Clear the Code: After performing repairs, clear the trouble code using an OBD-II scanner

  13. 13. Test Drive

    Take the vehicle for a test drive to see if the code reappears

  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 B1316 code. Always ensure safety precautions are taken when working with the vehicle's electrical system