B1855 Lexus Code - Short In Rear Side Squib Left Circuit
Quick Answer
The B1855 diagnostic trouble code for Lexus vehicles indicates a "Short In Rear Side Squib Left Circuit." This code specifically refers to an issue with the circuit that controls the left side airbag in the rear of the vehicle. Common causes include Damaged wiring in the rear side airbag circuit, Faulty rear side airbag squib, Loose or corroded connections in the airbag system. 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
- B1855 Lexus indicates Short In Rear Side Squib Left Circuit.
- Common causes
- Common causes include Damaged wiring in the rear side airbag circuit, Faulty rear side airbag squib, Loose or corroded connections in the airbag system.
- 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.
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Code B1855 Lexus Description
The B1855 diagnostic trouble code for Lexus vehicles indicates a "Short In Rear Side Squib Left Circuit." This code specifically refers to an issue with the circuit that controls the left side airbag in the rear of the vehicle. The squib is a component of the airbag system that helps deploy the 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's occupants.
Common Causes of B1855 Lexus
- Damaged wiring in the rear side airbag circuit.
- Faulty rear side airbag squib.
- Loose or corroded connections in the airbag system.
- Malfunctioning airbag control module.
- Impact or collision that damaged the airbag system components.
Symptoms of B1855 Lexus
- Airbag warning light illuminated on the dashboard.
- Inability to turn off the airbag warning light even after resetting it.
- Diagnostic trouble code B1855 stored in the vehicle's computer system.
- Airbag system failure message displayed on the instrument cluster.
- Non-deployment of the left rear side airbag during a collision.
How to Fix B1855 Lexus
- Begin by diagnosing the specific cause of the short in the rear side squib left circuit using a diagnostic scanner.
- Inspect the wiring harness for any visible damage or corrosion, repairing or replacing any damaged wires as needed.
- Test the rear side airbag squib for proper functionality and replace it if necessary.
- Check and tighten any loose connections in the airbag system to ensure proper communication.
- Clear the diagnostic trouble code from the vehicle's computer system and perform a test to ensure the issue has been resolved.
Cost to Fix B1855 Lexus
The cost of repairing a short in the rear side squib left circuit can vary depending on the specific cause of the issue and the extent of the repairs needed. On average, the cost of parts for this repair can range from $100 to $500, with labor costs adding an additional $100 to $300. Keep in mind that these are rough estimates, and actual costs may vary based on factors such as location, vehicle make and model, and the shop's labor rates. It's recommended to consult with a qualified mechanic or repair shop to get a more 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.
Frequently Asked Questions about B1855 Lexus Code
1. What are the common symptoms of OBDII code B1855 in a Lexus related to a short in the rear side squib left circuit?
The common symptoms include the airbag warning light illuminating on the dashboard and potential issues with the airbag system's functionality.
2. What could cause the OBDII code B1855 in a Lexus indicating a short in the rear side squib left circuit?
Possible causes include damaged wiring, a faulty airbag squib left circuit, or a problem with the airbag control module.
3. How can I diagnose the OBDII code B1855 related to a short in the rear side squib left circuit in my Lexus?
Diagnosis involves using a diagnostic scanner to retrieve the specific fault code, inspecting the wiring for damage or shorts, and testing the airbag squib left circuit for proper functionality.
4. Is it safe to drive my Lexus with the OBDII code B1855 indicating a short in the rear side squib left circuit?
It is not recommended to drive the vehicle with this code present, as it can affect the proper operation of the airbag system in the event of a collision.
5. Can I repair the OBDII code B1855 related to a short in the rear side squib left circuit in my Lexus myself?
Repairing this issue often requires specialized knowledge and tools, so it is recommended to have the problem diagnosed and repaired by a qualified automotive technician.
6. How much does it typically cost to repair the OBDII code B1855 in a Lexus due to a short in the rear side squib left circuit?
The cost of repair can vary depending on the exact cause of the issue, but it may involve replacing damaged wiring, repairing the airbag squib left circuit, or addressing issues with the airbag control module.
7. Are there any safety precautions I should take when working on the airbag system to resolve the OBDII code B1855 in my Lexus?
It is crucial to disconnect the vehicle's battery and wait for a specified time before working on the airbag system to prevent accidental deployment and ensure personal safety.
8. Can resetting the OBDII code B1855 related to a short in the rear side squib left circuit in my Lexus resolve the issue?
While clearing the fault code may temporarily turn off the warning light, it is essential to diagnose and address the root cause of the problem to ensure the airbag system's proper operation.
9. How long does it usually take to repair the OBDII code B1855 in a Lexus due to a short in the rear side squib left circuit?
The repair time can vary based on the complexity of the issue and the availability of parts, but it may take a few hours to a full day to complete the repair.
10. Will the OBDII code B1855 in my Lexus reset on its own after the issue with the rear side squib left circuit is fixed?
After the repair is completed and the underlying cause of the fault is resolved, the code may clear on its own after a few successful driving cycles, indicating that the issue has been fixed.
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