B1475 – Accessory Delay Relay Contact Short To Battery

The ODBII code B1475 indicates a malfunction where the accessory delay relay contact is shorted to the battery, potentially causing issues with the vehicle’s accessory power system.

The severity of ODBII code B1475 is moderate.

Common Causes For: B1474 Battery Saver Power Relay Circuit Short To Battery

• Shorted wiring or connectors
• Faulty accessory delay relay
• Malfunctioning body control module (BCM)
• Corroded or damaged electrical connections
• Stuck or damaged relay contacts
• Incorrectly installed aftermarket accessories
• Water intrusion or moisture damage in electrical components

Common misdiagnosis for B1475 Accessory Delay Relay Contact Short To Battery

• Faulty accessory delay relay
• Shorted wiring harness
• Defective body control module (BCM)
• Malfunctioning ignition switch
• Battery issues
• Faulty fuses
• Grounding problems

Common Troubleshooting Steps

When dealing with OBD-II code B1475, which indicates an “Accessory Delay Relay Contact Short To Battery,” there are several common troubleshooting steps you can follow to diagnose and potentially resolve the issue. Here’s a structured approach:

• Check the Vehicle’s Battery and Charging System: **Inspect Battery Voltage:** Ensure the battery is fully charged and in good condition. A weak battery can cause various electrical issues.
• **Check Alternator Output:** Verify that the alternator is functioning properly and providing adequate voltage.
• Inspect the Accessory Delay Relay: **Locate the Relay:** Find the accessory delay relay in the vehicle’s fuse box or relay panel.
• **Visual Inspection:** Check for any signs of damage, corrosion, or burnt contacts on the relay.
• **Test the Relay:** Swap the relay with a similar one (if available) to see if the code clears. You can also test the relay with a multimeter.
• Examine Wiring and Connectors: **Inspect Wiring Harness:** Look for damaged, frayed, or shorted wires in the circuit related to the accessory delay relay.
• **Check Connectors:** Ensure all connectors are secure and free of corrosion. Clean any dirty contacts.
• Scan for Additional Codes: **Check for Other Codes:** Use an OBD-II scanner to see if there are any other related trouble codes that could provide more context to the issue.
• Test the Accessory Delay Circuit: **Use a Multimeter:** Measure the voltage at the relay terminals to ensure it is receiving the correct voltage.
• **Check Ground Connections:** Ensure that the ground connections for the relay and associated circuits are solid.
• Inspect Related Components: **Check for Faulty Accessories:** Sometimes, a malfunctioning accessory (like a radio, power windows, etc.) can cause issues with the accessory delay relay.
• **Look for Aftermarket Modifications:** If any aftermarket accessories have been installed, ensure they are not causing electrical interference.
• Clear the Code and Test Drive: **Clear the Code:** After performing the above checks and repairs, clear the code using an OBD-II scanner.
• **Test Drive:** Take the vehicle for a test drive to see if the code returns.
• Consult a Professional: If the issue persists after performing these steps, it may be necessary to consult a professional mechanic or an automotive electrician for further diagnosis.Additional Tips: – Always refer to the vehicle’s service manual for specific wiring diagrams and relay locations. – Safety first: Disconnect the battery before working on electrical components to avoid shorts or shocks. By following these steps, you should be able to identify and resolve the issue related to the B1475 code.