AutoCodes – Generic – B1305

B1305 Code - Accessory Delay Relay Coil Circuit Short To Ground

Quick Answer

The accessory delay relay receives voltage at all times from the Smart Junction Box (SJB). Common causes include Faulty Accessory Delay Relay, Accessory Delay Relay harness is open or shorted, Accessory Delay Relay circuit poor electrical connection. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

What it means: B1305 indicates Accessory Delay Relay Coil Circuit Short To Ground.
Common causes: Common causes include Faulty Accessory Delay Relay, Accessory Delay Relay harness is open or shorted, Accessory Delay Relay circuit poor electrical connection.
Severity: Moderate - service should be scheduled soon.
Can I drive?: The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

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Code Popularity 23,718

How popular is this code, among other codes? Low

Repair Importance Level

Moderate (Service soon) (2 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Nov 29, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1305 Description

The accessory delay relay receives voltage at all times from the Smart Junction Box (SJB). The SJB controls the coil side ground of the accessory delay relay and activates the accessory delay relay when the ignition switch is in the ON position. The accessory delay relay remains active for an additional 10 minutes when the ignition switch is in the OFF position or until the driver door is opened. The accessory delay relay provides voltage to the door lock switches, power windows and roof opening panel (if equipped).

OBDII Code B1305 - Accessory Delay Relay Coil Circuit Short To Ground - AutoCodes.com — B1305 Code - Accessory Delay Relay Coil Circuit Short To Ground

What does this mean?

What are the Possible Causes of the DTC B1305?

Faulty Accessory Delay Relay
Accessory Delay Relay harness is open or shorted
Accessory Delay Relay circuit poor electrical connection
Faulty Smart Junction Box (SJB)

How to Fix the DTC B1305?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B1305 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the B1305 code?

Need more information on how to fix the B1305 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1305 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B1305 Ford — Accessory Delay Relay Coil Circuit Short To Ground
B1305 Lincoln — Accessory Delay Relay Coil Circuit Short To Ground
B1305 Mercury — Accessory Delay Relay Coil Circuit Short To Ground

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B1305 Code

1. What are common symptoms of OBDII code B1305 related to the Accessory Delay Relay Coil Circuit Short To Ground?

- Common symptoms include accessory delay features not functioning properly, such as delayed accessory power after turning off the ignition.

2. What causes the Accessory Delay Relay Coil Circuit Short To Ground code B1305?

- This code is typically triggered by a short circuit between the accessory delay relay coil and ground in the vehicle's electrical system.

3. How can I diagnose the Accessory Delay Relay Coil Circuit Short To Ground issue causing OBDII code B1305?

- Use a multimeter to test for continuity and shorts in the wiring connected to the accessory delay relay coil. Inspect the wiring harness and connectors for damage.

4. Is it safe to continue driving with OBDII code B1305 triggered by the Accessory Delay Relay Circuit issue?

- While the vehicle may still operate, it is not recommended to continue driving with this issue as it can lead to further electrical problems or malfunctions.

5. What are the repair options for fixing OBDII code B1305 related to the Accessory Delay Relay Circuit Short To Ground?

- Repair options include repairing or replacing damaged wiring, repairing the relay circuit, or replacing the accessory delay relay if necessary.

6. Can a DIY enthusiast fix the Accessory Delay Relay Circuit issue causing OBDII code B1305?

- Depending on the individual's skill level and experience with automotive electrical systems, a DIY enthusiast may be able to diagnose and repair this issue with the proper tools and guidance.

7. Are there any precautions to take when working on the Accessory Delay Relay Circuit to resolve OBDII code B1305?

- Before working on the electrical system, disconnect the vehicle's battery to prevent any short circuits or electrical hazards.

8. Will resetting the OBDII system clear the B1305 code related to the Accessory Delay Relay Circuit issue?

- Resetting the OBDII system may temporarily clear the code, but it will likely return if the underlying issue with the accessory delay relay circuit is not addressed.

9. Can extreme weather conditions cause the Accessory Delay Relay Circuit Short To Ground issue triggering OBDII code B1305?

- While extreme weather conditions may not directly cause this specific issue, they can exacerbate existing electrical problems in a vehicle.

10. Is the Accessory Delay Relay Circuit issue causing OBDII code B1305 a common problem in certain vehicle makes and models?

- This issue can occur in various vehicle makes and models that are equipped with an accessory delay system, but its frequency may vary among different vehicles.