B1313 – Battery Saver Relay Coil Circuit Failure

The ODBII code B1313 indicates a failure in the battery saver relay coil circuit, which may affect the operation of the battery saver system in the vehicle.

The severity of ODBII code B1313 is generally considered moderate.

Common Causes For: B1312 Lamp Headlamp Input Circuit Short To Battery

• Faulty battery saver relay
• Damaged wiring or connectors in the relay circuit
• Short circuit in the relay coil circuit
• Open circuit in the relay coil circuit
• Faulty body control module (BCM)
• Corroded terminals or connections
• Weak or failing battery
• Poor ground connection

Common misdiagnosis for B1313 Battery Saver Relay Coil Circuit Failure

• Faulty battery
• Bad alternator
• Corroded battery terminals
• Wiring issues
• Faulty battery saver relay
• Malfunctioning body control module (BCM)
• Incorrectly installed or damaged fuses
• Short circuits in the electrical system

Common Troubleshooting Steps

The OBD-II code B1313 indicates a “Battery Saver Relay Coil Circuit Failure.” This code typically relates to issues with the battery saver relay, which is responsible for controlling power to various electrical components in the vehicle to prevent battery drain. Here are some common troubleshooting steps to diagnose and resolve this issue:

• Check the Battery:: **Voltage Test:** Use a multimeter to check the battery voltage. It should be around 12.6 volts when fully charged.
• **Load Test:** Perform a load test to ensure the battery can hold a charge under load.
• Inspect Fuses:: Check the fuses related to the battery saver relay and other associated circuits. Replace any blown fuses.
• Examine the Relay:: **Visual Inspection:** Check the battery saver relay for any signs of damage or corrosion.
• **Test the Relay:** Swap the relay with a similar one (if available) to see if the issue persists. You can also test the relay using a multimeter to check for continuity.
• Check Wiring and Connectors:: Inspect the wiring and connectors associated with the battery saver relay for any signs of damage, corrosion, or loose connections.
• Look for frayed wires or broken connectors that could interrupt the circuit.
• Test the Relay Coil Circuit:: Use a multimeter to check for voltage at the relay coil terminals when the ignition is on. If there is no voltage, trace the wiring back to the power source and check for continuity.
• If there is voltage but the relay does not activate, the relay may be faulty.
• Scan for Additional Codes:: Use an OBD-II scanner to check for any other related trouble codes that may provide additional context for the issue.
• Inspect the Body Control Module (BCM):: If the relay and wiring are functioning correctly, the issue may lie within the BCM. Check for any software updates or known issues with the BCM for your vehicle model.
• Clear Codes and Test Drive:: After performing the above checks and repairs, clear the trouble codes using an OBD-II scanner and take the vehicle for a test drive to see if the code returns.
• Consult Repair Manual:: Refer to the vehicle’s service manual for specific wiring diagrams and troubleshooting procedures related to the battery saver relay circuit.
• Seek Professional Help:: If the issue persists after performing these steps, it may be best to consult a professional mechanic or technician for further diagnosis. By following these steps, you should be able to identify and resolve the issue related to the B1313 code.