Engine-CodesLexus – B1185 Lexus

B1185 Lexus Code - Short In Passenger Side Air Bag Second Stage Squib Circuit

Quick Answer

The B1185 diagnostic trouble code for Lexus vehicles indicates a short in the passenger side airbag second stage squib circuit. Common causes include Wiring harness damage or corrosion, Faulty passenger side airbag squib circuit, Malfunctioning airbag control module. 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
B1185 Lexus indicates Short In Passenger Side Air Bag Second Stage Squib Circuit.
Common causes
Common causes include Wiring harness damage or corrosion, Faulty passenger side airbag squib circuit, Malfunctioning airbag control module.
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.
Table of contents Created and updated by William Orellana on Sep 15, 2024
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Code B1185 Lexus Description

The B1185 diagnostic trouble code for Lexus vehicles indicates a short in the passenger side airbag second stage squib circuit. The airbag system in a vehicle is designed to deploy in the event of a collision to protect the occupants from serious injury. The squib circuit is responsible for igniting the airbag inflator to deploy the airbag. A short in this circuit can prevent the airbag from deploying properly, compromising the safety of the vehicle's occupants.

OBDII Code B1185 Lexus - Short In Passenger Side Air Bag Second Stage Squib Circuit
B1185 Lexus Code - Short In Passenger Side Air Bag Second Stage Squib Circuit

Common Causes of B1185 Lexus

  1. Wiring harness damage or corrosion
  2. Faulty passenger side airbag squib circuit
  3. Malfunctioning airbag control module
  4. Loose or damaged connectors in the airbag system

Symptoms of B1185 Lexus

  1. Airbag warning light illuminated on the dashboard
  2. Inability to turn off the airbag warning light
  3. Non-deployment of the passenger side airbag during a collision
  4. Intermittent issues with the passenger side airbag system

How to Fix B1185 Lexus

  1. Begin by diagnosing the exact cause of the short in the passenger side airbag second stage squib circuit using a diagnostic scanner.
  2. Inspect the wiring harness for any damage or corrosion, and repair or replace any affected wires.
  3. Check the passenger side airbag squib circuit for faults and replace if necessary.
  4. Test the airbag control module for proper functioning and replace if found to be faulty.
  5. Clear the diagnostic trouble code and test the airbag system to ensure proper deployment.

Cost to Fix B1185 Lexus

The cost of repairing a short in the passenger side airbag second stage squib circuit can vary depending on the specific cause of the issue and the labor rates at the auto repair shop. Typically, the parts required for this repair can range from $200 to $500, while the labor costs can be between $150 and $300. Overall, the total repair cost can range from $350 to $800. It is important to note that these are rough estimates, and actual costs may vary based on the location, vehicle make and model, and other factors. It is recommended to obtain quotes from local auto repair shops for a more accurate estimate.

Need more information about the B1185 Lexus code?

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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 B1185 Lexus Code

1. What are the common symptoms of OBDII code B1185 in a Lexus related to a short in the passenger side air bag second stage squib circuit?

The common symptoms include the airbag warning light illuminating on the dashboard and a potential loss of functionality in the passenger side airbag system.

2. What are some possible causes of the B1185 code indicating a short in the passenger side air bag second stage squib circuit in a Lexus?

Potential causes include damaged wiring or connectors in the airbag system, a faulty airbag squib, or issues with the airbag control module.

3. How can I diagnose the source of the short in the passenger side air bag second stage squib circuit in my Lexus triggering the B1185 code?

A thorough inspection of the wiring, connectors, and components in the passenger side airbag system will be necessary. Using a multimeter to test for continuity and resistance can help pinpoint the location of the short.

4. Is it safe to drive my Lexus with the B1185 code indicating a short in the passenger side air bag second stage squib circuit?

It is not recommended to drive the vehicle with unresolved airbag issues, as the safety of the passengers may be compromised in the event of a collision.

5. How can I clear the B1185 OBDII code related to a short in the passenger side air bag second stage squib circuit in my Lexus after repairing the issue?

After repairing the short and addressing the underlying cause, the OBDII code can be cleared using a compatible scan tool or by disconnecting the vehicle's battery for a few minutes.

6. Can I repair the short in the passenger side air bag second stage squib circuit causing the B1185 code in my Lexus myself, or should I seek professional assistance?

Repairing airbag system issues can be complex and dangerous due to the sensitive nature of these components. It is recommended to seek professional assistance to ensure the repair is done correctly and safely.

7. Are there any safety precautions I should take when working on the passenger side air bag second stage squib circuit in my Lexus to resolve the B1185 code?

Before working on the airbag system, it is crucial to disconnect the vehicle's battery and wait for at least 10 minutes to allow the system to discharge completely. This helps prevent accidental airbag deployment.

8. Will fixing the short in the passenger side air bag second stage squib circuit causing the B1185 code require replacing any components in my Lexus?

Depending on the root cause of the short, components such as wiring, connectors, or the airbag squib may need to be replaced to resolve the issue and clear the OBDII code.

9. How long does it typically take to repair a short in the passenger side air bag second stage squib circuit leading to the B1185 code in a Lexus?

The repair time can vary based on the complexity of the issue and the availability of parts. It is advisable to consult with a professional technician to get an estimate of the repair duration.

10. Can the B1185 OBDII code related to a short in the passenger side air bag second stage squib circuit in a Lexus affect the functionality of other vehicle systems?

While the primary concern is the proper operation of the airbag system, unresolved airbag issues can sometimes trigger warning lights or codes in other vehicle systems. Regular maintenance and timely repairs are essential to ensure overall vehicle safety and performance.

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