B1846 Scion Code - Open In Curtain Shield Squib Left 2nd Step Circuit
Quick Answer
The Curtain Shield Squib Left (LF) 2nd Step Circuit consists of the Center Airbag Sensor Assembly and the Curtain Shield Airbag Assembly Left (LH). Common causes include Faulty Curtain Shield Airbag Assembly Left (LH) (Curtain Shield Squib Left 2nd Step), Curtain Shield Airbag Assembly Left harness is open or shorted, Curtain Shield Airbag Assembly Left circuit poor electrical connection. 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
- B1846 Scion indicates Open In Curtain Shield Squib Left 2nd Step Circuit.
- Common causes
- Common causes include Faulty Curtain Shield Airbag Assembly Left (LH) (Curtain Shield Squib Left 2nd Step), Curtain Shield Airbag Assembly Left harness is open or shorted, Curtain Shield Airbag Assembly Left circuit poor electrical connection.
- 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 B1846 Scion Description
What are the Possible Causes of the DTC B1846 Scion?
- Faulty Curtain Shield Airbag Assembly Left (LH) (Curtain Shield Squib Left 2nd Step)
- Curtain Shield Airbag Assembly Left harness is open or shorted
- Curtain Shield Airbag Assembly Left circuit poor electrical connection
- Faulty Center Airbag Sensor Assembly
How to Fix the DTC B1846 Scion?
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 B1846 Scion 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 B1846 Scion Code
1. What does OBDII code B1846 mean for a Scion?
Code B1846 indicates an "Open In Curtain Shield Squib Left 2nd Step Circuit," which refers to an issue with the left-side curtain airbag's second-stage deployment circuit.
2. What are the common symptoms of code B1846?
The most common symptom is an illuminated airbag warning light on the dashboard. The airbag system may also be disabled until the issue is resolved.
3. What causes code B1846 to appear?
The code can be triggered by damaged or corroded wiring, a loose or faulty connector, a defective curtain airbag, or a malfunctioning airbag control module.
4. Is it safe to drive with code B1846 present?
No, driving with this code is not recommended, as it indicates a potential fault in the airbag system, which may prevent proper airbag deployment during a collision.
5. How is code B1846 diagnosed?
A technician will use a scan tool to confirm the code, inspect the wiring and connectors for damage or corrosion, and test the curtain airbag and control module for faults.
6. Can I fix code B1846 myself?
If you have experience with automotive electrical systems, you can check for loose or damaged wiring and connectors. However, for safety-critical components like airbags, professional repair is advised.
7. How much does it cost to fix code B1846?
Repair costs vary, depending on the issue. Replacing damaged wiring or connectors may cost $100-$300, while a faulty airbag or control module could cost significantly more.
8. Can a low battery cause code B1846?
A low or failing battery is unlikely to cause this specific code, but voltage irregularities can sometimes trigger airbag system faults. Always ensure the battery is in good condition.
9. Will clearing the code with a scan tool fix the problem?
No, clearing the code without addressing the underlying issue will only temporarily erase it. The code will return if the fault persists.
10. Do I need to replace the airbag to fix code B1846?
Not necessarily. The issue could be with the wiring, connectors, or control module rather than the airbag itself. A proper diagnosis is essential to determine the root cause.
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