B1806 Lexus Code - Open In Front Passenger Side Squib Circuit
Quick Answer
The Front Passenger Side Squib Circuit consists of the Center Airbag Sensor Assembly and the Front Passenger Airbag Assembly. Common causes include Instrument panel wire, Faulty Front Passenger Airbag Assembly (Front Passenger Side Squib), Front Passenger Airbag Assembly harness is open or shorted. 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
- B1806 Lexus indicates Open In Front Passenger Side Squib Circuit.
- Common causes
- Common causes include Instrument panel wire, Faulty Front Passenger Airbag Assembly (Front Passenger Side Squib), Front Passenger Airbag Assembly harness is open or shorted.
- 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.
Code B1806 Lexus Description
What are the Possible Causes of the DTC B1806 Lexus?
- Instrument panel wire
- Faulty Front Passenger Airbag Assembly (Front Passenger Side Squib)
- Front Passenger Airbag Assembly harness is open or shorted
- Front Passenger Airbag Assembly circuit poor electrical connection
- Faulty Center Airbag Sensor Assembly
How to Fix the DTC B1806 Lexus?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B1806 Lexus code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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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 B1806 Lexus Code
1. What are the common symptoms of OBDII code B1806 in a Lexus related to an open in the front passenger side squib circuit?
- The common symptoms include the airbag warning light illuminating on the dashboard and potential non-deployment of the front passenger airbag during a collision.
2. What are some possible causes of the B1806 code indicating an open in the front passenger side squib circuit in a Lexus?
- The code can be triggered by issues such as a faulty front passenger airbag module, damaged wiring or connectors, or a blown fuse related to the airbag system.
3. How can I diagnose the open in the front passenger side squib circuit causing the B1806 code in my Lexus?
- Diagnosis typically involves using a scan tool to retrieve the specific fault code, inspecting the wiring and connectors for damage, and testing the front passenger airbag module for proper functionality.
4. Can I still drive my Lexus with the B1806 code indicating an open in the front passenger side squib circuit?
- It is not recommended to drive the vehicle with this code present, as it may compromise the safety of the front passenger in the event of a collision due to potential airbag non-deployment.
5. How should I repair the open in the front passenger side squib circuit issue causing the B1806 code in my Lexus?
- Repair involves addressing the specific cause of the open circuit, which may include replacing the faulty front passenger airbag module, repairing damaged wiring or connectors, and ensuring all components are properly connected.
6. Are there any safety precautions I should take when working on the front passenger side squib circuit in my Lexus to resolve the B1806 code?
- It is crucial to disconnect the vehicle's battery before working on any airbag-related components to prevent accidental airbag deployment, which can cause serious injury.
7. How much does it typically cost to repair the open in the front passenger side squib circuit issue triggering the B1806 code in a Lexus?
- Repair costs can vary depending on the specific cause of the issue, but they may range from a few hundred to over a thousand dollars, including parts and labor.
8. Can I reset the B1806 code related to an open in the front passenger side squib circuit in my Lexus without fixing the underlying issue?
- Resetting the code without fixing the underlying problem will likely result in the code reappearing once the vehicle's system detects the issue again, so it's best to address the root cause of the problem.
9. Is the repair for the B1806 code indicating an open in the front passenger side squib circuit covered under warranty for a Lexus vehicle?
- Depending on the vehicle's warranty status and coverage, the repair for this issue may be covered if deemed a manufacturer defect. It's advisable to check with a Lexus dealership or service center.
10. How long does it typically take to repair the open in the front passenger side squib circuit issue causing the B1806 code in a Lexus?
- The repair time can vary based on the complexity of the issue and availability of parts. In general, it may take a few hours to a full day to diagnose and fix the problem.
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