B1B18 RAM Code - Left Side Curtain Squib 1 Circuit Low
Quick Answer
When powered, the Occupant Restraint Controller (ORC) sends a test current to the squibs to verify the integrity of the squib and wiring. Common causes include Faulty Left Side Curtain Squib 1, Left Side Curtain Squib 1 harness is open or shorted, Left Side Curtain Squib 1 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
- B1B18 RAM indicates Left Side Curtain Squib 1 Circuit Low.
- Common causes
- Common causes include Faulty Left Side Curtain Squib 1, Left Side Curtain Squib 1 harness is open or shorted, Left Side Curtain Squib 1 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 B1B18 RAM Description
What are the Possible Causes of the DTC B1B18 RAM?
- Faulty Left Side Curtain Squib 1
- Left Side Curtain Squib 1 harness is open or shorted
- Left Side Curtain Squib 1 circuit poor electrical connection
- Faulty Left Side Curtain Airbag
- Faulty Occupant Restraint Controller (ORC)
How to Fix the DTC B1B18 RAM?
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 B1B18 RAM 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 B1B18 RAM Code
1. What does the OBDII code B1B18 mean?
The B1B18 code indicates a problem with the "Left Side Curtain Squib 1 Circuit Low," which is part of the airbag system designed to protect passengers during a side-impact collision.
2. What are the symptoms of the B1B18 code?
Common symptoms include an illuminated airbag warning light on the dashboard and the airbag system being disabled or partially functional.
3. What causes the B1B18 code to appear?
This code is typically caused by a faulty side curtain airbag, damaged wiring or connectors, a failed clock spring, or an issue with the airbag control module.
4. Is it safe to drive with the B1B18 code active?
It is not safe to drive with this code active, as the side curtain airbag may not deploy properly in the event of a collision, compromising passenger safety.
5. How can I diagnose the B1B18 code?
Diagnosis involves using an OBDII scanner to confirm the code, visually inspecting the airbag wiring and connectors for damage, and testing the continuity of the squib circuit with a multimeter.
6. Can a loose connector trigger the B1B18 code?
Yes, a loose or corroded connector in the left side curtain airbag circuit can cause a low voltage condition, triggering the code.
7. How is the B1B18 code fixed?
Repairs may include replacing the left side curtain airbag, repairing or replacing damaged wiring or connectors, or reprogramming or replacing the airbag control module.
8. How much does it typically cost to fix the B1B18 code?
Repair costs can vary widely, ranging from $100 to $1,000 or more, depending on the specific issue and whether parts like the airbag or control module need replacement.
9. Can I clear the B1B18 code without fixing the issue?
Clearing the code without addressing the underlying problem will only temporarily remove the warning, as the code will reappear once the system detects the fault again.
10. Do I need a professional to fix the B1B18 code?
Due to the complexity and safety-critical nature of the airbag system, it is recommended to have a certified technician diagnose and repair the issue to ensure proper operation.
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