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B1186 Lexus Code - Open In Passenger Side Air Bag Second Stage Squib Circuit

Quick Answer

The B1186 diagnostic trouble code for Lexus indicates an open circuit in the passenger side airbag's second stage squib circuit. Common causes include Faulty wiring or connectors in the airbag system, Damage to the second stage squib component, Corrosion or moisture intrusion in the 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
B1186 Lexus indicates Open In Passenger Side Air Bag Second Stage Squib Circuit.
Common causes
Common causes include Faulty wiring or connectors in the airbag system, Damage to the second stage squib component, Corrosion or moisture intrusion in the 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 Aug 30, 2024
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Code B1186 Lexus Description

The B1186 diagnostic trouble code for Lexus indicates an open circuit in the passenger side airbag's second stage squib circuit. The second stage squib is a component of the airbag system responsible for deploying the airbag with a specific force in the event of a collision. An open circuit in this system can prevent the airbag from deploying properly, compromising the safety of the vehicle's occupants in the event of a crash. This issue should be addressed promptly to ensure the airbag system functions as intended.

OBDII Code B1186 Lexus - Open In Passenger Side Air Bag Second Stage Squib Circuit
B1186 Lexus Code - Open In Passenger Side Air Bag Second Stage Squib Circuit

Common Causes of B1186 Lexus

  1. Faulty wiring or connectors in the airbag system
  2. Damage to the second stage squib component
  3. Corrosion or moisture intrusion in the circuit
  4. Impact or collision that has damaged the airbag system
  5. Electrical issues in the vehicle's wiring system

Symptoms of B1186 Lexus

  1. Airbag warning light illuminated on the dashboard
  2. Inability to activate the passenger side airbag
  3. Error code displayed on the vehicle's diagnostic system
  4. Failure of the passenger side airbag to deploy in a collision

How to Fix B1186 Lexus

  1. Diagnose the specific cause of the open circuit using a diagnostic scanner and multimeter
  2. Inspect the wiring and connectors for damage or corrosion, repairing or replacing as necessary
  3. Test the second stage squib component to determine if it is functioning correctly
  4. Clear the error code and reset the airbag system using a diagnostic tool
  5. Conduct a thorough test of the airbag system to ensure proper functionality

Cost to Fix B1186 Lexus

The typical repair costs for addressing an open circuit in the passenger side airbag second stage squib circuit can vary depending on the extent of the damage and the specific components that require replacement. In general, the cost can range from $200 to $500 including parts and labor. However, it's important to note that labor rates at auto repair shops can vary, and additional diagnostic time may be required to pinpoint the exact cause of the issue. It's advisable to consult with a qualified technician to receive a more accurate estimate for your specific vehicle.

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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 B1186 Lexus Code

1. What are common symptoms of OBDII code B1186 in a Lexus related to the passenger side airbag circuit?

- Common symptoms include the airbag warning light staying on, the airbag not deploying in an accident, and diagnostic trouble codes related to the passenger side airbag circuit.

2. What are the possible causes of OBDII code B1186 in a Lexus for an open circuit in the passenger side airbag second stage squib?

- The code may be triggered by a loose or disconnected wiring connection, a faulty airbag squib (igniter), a blown fuse, or a malfunctioning airbag control module.

3. How can I diagnose and repair an open circuit in the passenger side airbag squib circuit in a Lexus?

- To diagnose the issue, use an OBDII scanner to retrieve the specific trouble code, then inspect the wiring connections, test the airbag squib for continuity, check the fuse, and verify the airbag control module functionality. Repair any faults found.

4. Is it safe to drive a Lexus with OBDII code B1186 related to an open circuit in the passenger side airbag squib circuit?

- It is not recommended to drive the vehicle with this issue, as the passenger side airbag may not deploy in the event of a collision, potentially putting the occupant at risk.

5. Can I reset the OBDII code B1186 in a Lexus after repairing the open circuit in the passenger side airbag squib circuit?

- Yes, after repairing the issue causing the code, you can use an OBDII scanner to clear the code and reset the airbag warning light.

6. Do I need special tools to repair OBDII code B1186 in a Lexus for an open circuit in the passenger side airbag squib circuit?

- Basic tools such as a multimeter, wire connectors, and a soldering iron may be needed to diagnose and repair the open circuit in the passenger side airbag squib circuit.

7. How much does it cost to repair OBDII code B1186 in a Lexus related to an open circuit in the passenger side airbag squib circuit?

- The cost of repair can vary depending on the specific issue causing the open circuit, the labor rates of the repair shop, and the cost of any replacement parts needed such as an airbag squib or wiring harness.

8. Are there any recalls or service bulletins related to OBDII code B1186 in Lexus vehicles for an open circuit in the passenger side airbag squib circuit?

- It is recommended to check with a Lexus dealership or the manufacturer's website to see if there are any recalls or service bulletins related to this specific OBDII code in your vehicle.

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