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B1835 Lexus Code - Short in Curtain Shield Squib Left Circuit

Quick Answer

The B1835 code for Lexus indicates a short in the Curtain Shield Squib Left Circuit. Common causes include Damaged wiring or connectors in the Curtain Shield Squib Left Circuit, Faulty curtain shield squib or airbag module, Issues with the 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
B1835 Lexus indicates Short in Curtain Shield Squib Left Circuit.
Common causes
Common causes include Damaged wiring or connectors in the Curtain Shield Squib Left Circuit, Faulty curtain shield squib or airbag module, Issues with the 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.
What is this?
Table of contents Created and updated by William Orellana on Aug 19, 2024
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Code B1835 Lexus Description

The B1835 code for Lexus indicates a short in the Curtain Shield Squib Left Circuit. The Curtain Shield Squib refers to the airbag system in the vehicle, specifically the side curtain airbag. This circuit is responsible for deploying the left side curtain airbag in the event of a collision. A short in this circuit can prevent the airbag from deploying properly, compromising the safety of the vehicle occupants.

OBDII Code B1835 Lexus - Short in Curtain Shield Squib Left Circuit
B1835 Lexus Code - Short in Curtain Shield Squib Left Circuit

Common Causes of B1835 Lexus

  1. Damaged wiring or connectors in the Curtain Shield Squib Left Circuit
  2. Faulty curtain shield squib or airbag module
  3. Issues with the airbag control module
  4. Corrosion or water damage in the airbag system components

Symptoms of B1835 Lexus

  1. Airbag warning light illuminated on the dashboard
  2. Inability to turn off the airbag warning light
  3. Side curtain airbag not deploying in a collision
  4. Possible loss of communication with the airbag system

How to Fix B1835 Lexus

  1. Diagnose the issue using a scan tool to pinpoint the exact location of the short
  2. Inspect the wiring and connectors for damage or corrosion and repair as needed
  3. Replace the faulty curtain shield squib or airbag module if necessary
  4. Clear the diagnostic trouble codes and reset the airbag system
  5. Perform a thorough test to ensure the airbag system is functioning properly

Cost to Fix B1835 Lexus

The cost of repairing a short in the Curtain Shield Squib Left Circuit can vary depending on the specific cause of the issue and the labor rates in your area. On average, you can expect to pay anywhere from $200 to $500 for parts and labor. Keep in mind that rates can vary based on location, vehicle make and model, and the severity of the issue. It's recommended to consult with a professional mechanic to get an accurate estimate for your specific situation.

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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 B1835 Lexus Code

1. What are the common symptoms of OBDII code B1835 in a Lexus related to a short in the Curtain Shield Squib Left Circuit?

The common symptoms include the airbag warning light being illuminated on the dashboard and potential issues with the curtain airbag system.

2. What can cause the OBDII code B1835 "Short in Curtain Shield Squib Left Circuit" in a Lexus?

Common causes include a faulty curtain shield squib (airbag) on the left side, damaged wiring or connectors in the circuit, or a malfunction in the airbag control module.

3. How serious is the OBDII code B1835 in a Lexus?

This code indicates a problem with the curtain airbag system, which is a crucial safety feature in the vehicle. It is important to address this issue promptly to ensure the airbags deploy correctly in case of an accident.

4. Can I continue driving my Lexus with the OBDII code B1835 present?

It is not recommended to drive the vehicle with this code active, as it indicates a potential issue with the airbag system. The airbags may not deploy properly in the event of a collision, compromising passenger safety.

5. How can I diagnose and repair the OBDII code B1835 in my Lexus?

Diagnosis typically involves using a scan tool to retrieve the specific details of the code. Repair may involve inspecting and repairing or replacing the curtain shield squib, checking and repairing wiring/connectors, or addressing any issues with the airbag control module.

6. Is it possible to reset the OBDII code B1835 in a Lexus without fixing the underlying issue?

While clearing the code may temporarily turn off the warning light, the underlying problem with the airbag system will persist. It is crucial to address the root cause of the code to ensure the airbags function correctly.

7. How much does it cost to repair the OBDII code B1835 in a Lexus?

The cost of repair can vary depending on the specific cause of the code, parts needed, and labor costs. It is recommended to consult a professional mechanic for an accurate diagnosis and cost estimate.

8. Can I fix the OBDII code B1835 in my Lexus myself?

Repairing this code may involve complex airbag system components, so it is recommended to have the issue diagnosed and repaired by a qualified mechanic with experience in handling airbag systems.

9. Are there any safety precautions I should take when working on the airbag system to fix the OBDII code B1835 in my Lexus?

It is crucial to disconnect the vehicle battery and wait for the airbag system to discharge before working on any components related to the airbag system. Safety procedures must be followed to avoid accidental deployment of the airbags.

10. How often does the OBDII code B1835 occur in Lexus vehicles?

While the frequency may vary, issues related to the curtain shield squib circuit can occur in Lexus vehicles equipped with airbag systems. Regular maintenance and prompt attention to warning lights can help prevent such issues.

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