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B1805 Toyota Code - Short In Front Passenger Side Squib Circuit

Quick Answer

When a B1805 diagnostic trouble code (DTC) is stored in a Toyota vehicle, it indicates a short in the front passenger side squib circuit. Common causes include Wiring harness damage or short circuit, Faulty front passenger side airbag module, Faulty squib circuit. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
B1805 Toyota indicates Short In Front Passenger Side Squib Circuit.
Common causes
Common causes include Wiring harness damage or short circuit, Faulty front passenger side airbag module, Faulty squib circuit.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 06, 2024
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Code B1805 Toyota Description

When a B1805 diagnostic trouble code (DTC) is stored in a Toyota vehicle, it indicates a short in the front passenger side squib circuit. The term "squib" refers to the explosive charge within an airbag module that deploys the airbag in the event of a collision. The front passenger side squib circuit is responsible for deploying the airbag on the front passenger side of the vehicle. A short in this circuit can prevent the airbag from deploying properly in the event of a crash, compromising the safety of the vehicle occupants.

OBDII Code B1805 Toyota - Short In Front Passenger Side Squib Circuit
B1805 Toyota Code - Short In Front Passenger Side Squib Circuit

Common Causes of B1805 Toyota

  1. Wiring harness damage or short circuit
  2. Faulty front passenger side airbag module
  3. Faulty squib circuit
  4. Corrosion in the connectors of the squib circuit
  5. Impact or collision that caused damage to the airbag system

Symptoms of B1805 Toyota

  1. Illumination of the SRS warning light on the dashboard
  2. Airbag system warning message displayed on the instrument cluster
  3. Inability to turn off the passenger-side airbag
  4. Failure of the passenger-side airbag to deploy during a collision

How to Fix B1805 Toyota

  1. Begin by disconnecting the vehicle's battery to prevent accidental airbag deployment.
  2. Inspect the wiring harness for any visible damage or signs of a short circuit.
  3. Check the connectors of the squib circuit for corrosion and clean or replace them as necessary.
  4. Test the front passenger side airbag module for faults and replace it if needed.
  5. Clear the diagnostic trouble code from the vehicle's memory using a scan tool, and perform a test to ensure that the airbag system functions properly.

Cost to Fix B1805 Toyota

The cost of repairing a short in the front passenger side squib circuit can vary depending on the specific issue causing the code and the labor rates at the auto repair shop. On average, the repair costs for this issue can range from $200 to $500, including parts and labor. It's important to note that prices may differ based on the vehicle's make and model, the severity of the problem, and the location of the repair facility. It's recommended to obtain quotes from multiple repair shops to find the best price for the necessary repairs.

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Information for Specific Toyota Models

Precautions for SRS “AIR BAG” and “SEAT BELT PRE-TENSIONER” Service

  • Never probe the electrical connectors on air bag, side air curtain modules or seat belts.
  • Never disassemble or tamper with safety belt buckle/retractor pretensioners, adaptive load limiting retractors, safety belt inflators, or probe the electrical connectors.
  • Do not use electrical test equipment to check SRS circuits unless instructed to in this Service Manual.
  • Before servicing the SRS, turn ignition switch OFF, disconnect both battery cables and wait at least 3 minutes. For approximately 3 minutes after the cables are removed, it is still possible for the air bag and seat belt pre-tensioner to deploy. Therefore, do not work on any SRS connectors or wires until at least 3 minutes have passed.

Failure to follow this instruction may result in the accidental deployment of these modules, which increases the risk of serious personal injury or death.

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 B1805 Toyota Code

1. What are common symptoms of OBDII code B1805 in a Toyota related to a short in the front passenger side squib circuit?

- Common symptoms include an illuminated airbag warning light on the dashboard and potential non-deployment of the passenger side airbag in case of an accident.

2. What can cause the OBDII code B1805 in a Toyota indicating a short in the front passenger side squib circuit?

- The code can be triggered by a short circuit in the wiring harness, a faulty squib (airbag) unit, or a poor connection in the passenger side airbag system.

3. How can I diagnose the source of the short in the front passenger side squib circuit triggering OBDII code B1805 in my Toyota?

- To diagnose the issue, you can perform a visual inspection of the wiring harness, check the connections to the squib unit, and use a multimeter to test for continuity and resistance in the circuit.

4. Is it safe to drive my Toyota with OBDII code B1805 related to a short in the front passenger side squib circuit?

- It is not recommended to drive the vehicle with this code present, as it indicates a potential issue with the passenger side airbag system, which could affect its functionality in case of an accident.

5. Can I reset the OBDII code B1805 related to a short in the front passenger side squib circuit in my Toyota without fixing the underlying issue?

- While you can clear the code using an OBDII scanner, it is crucial to address the root cause of the problem to ensure the proper functioning of the passenger side airbag system.

6. What are some repair tips for fixing OBDII code B1805 due to a short in the front passenger side squib circuit in a Toyota?

- Repair tips include checking and repairing any damaged wiring, replacing the faulty squib unit if necessary, and ensuring all connections in the airbag system are secure.

7. How much does it typically cost to repair OBDII code B1805 related to a short in the front passenger side squib circuit in a Toyota?

- The cost of repair can vary depending on the extent of the damage and the parts that need to be replaced, but it is advisable to consult a professional for an accurate estimate.

8. Can I fix OBDII code B1805 indicating a short in the front passenger side squib circuit in my Toyota myself, or should I seek professional help?

- While some basic troubleshooting and repairs can be done by DIY enthusiasts, addressing issues related to the airbag system may require specialized knowledge and tools, so it is recommended to seek professional help.

9. Will fixing OBDII code B1805 in my Toyota related to a short in the front passenger side squib circuit affect the overall safety of the vehicle?

- Yes, addressing this code is crucial for maintaining the safety features of your vehicle, particularly the proper functioning of the passenger side airbag in case of a collision.

10. How long does it typically take to repair OBDII code B1805 due to a short in the front passenger side squib circuit in a Toyota?

- The repair time can vary depending on the complexity of the issue and the availability of parts, but it is advisable to consult with a professional technician for a more accurate timeframe.

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