AutoCodes – RAM – B1B20 RAM

B1B20 RAM Code - Right 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 the wiring. Common causes include Faulty Right Side Curtain Squib 1, Right Side Curtain Squib 1 harness is open or shorted, Right 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: B1B20 RAM indicates Right Side Curtain Squib 1 Circuit Low.
Common causes: Common causes include Faulty Right Side Curtain Squib 1, Right Side Curtain Squib 1 harness is open or shorted, Right 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.

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Code Popularity 623

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Aug 15, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1B20 RAM Description

When powered, the Occupant Restraint Controller (ORC) sends a test current to the squibs to verify the integrity of the squib and the wiring. These circuits are maintained in a floating configuration at the module, (connected to neither power nor ground), as protection against inadvertent deployment. The use of the Supplemental Restraint System (SRS) Load Tool Adapter provides a test point, as well as a method for opening the shorting bar connections within the harness connector. The ORC sends out a 40 mA diagnostic current on each squib voltage supply circuit at power up and every 500 ms thereafter while the ignition is on.

OBDII Code B1B20 RAM - Right Side Curtain Squib 1 Circuit Low - AutoCodes.com — B1B20 RAM Code - Right Side Curtain Squib 1 Circuit Low

What does this mean?

What are the Possible Causes of the DTC B1B20 RAM?

Faulty Right Side Curtain Squib 1
Right Side Curtain Squib 1 harness is open or shorted
Right Side Curtain Squib 1 circuit poor electrical connection
Faulty Right Side Curtain Airbag
Faulty Occupant Restraint Controller (ORC)

How to Fix the DTC B1B20 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 B1B20 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.

Need more information about the B1B20 RAM code?

Need more information on how to fix the B1B20 RAM code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1B20 RAM code diagnosed by a professional: Find a repair shop in your area

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 B1B20 RAM Code

1. What are the common symptoms of OBDII code B1B20 RAM, titled Right Side Curtain Squib 1 Circuit Low?

The common symptoms of this code may include an illuminated airbag warning light on the dashboard, non-deployment of the right side curtain airbag, and potential diagnostic trouble codes related to the airbag system.

2. What could be the possible causes of OBDII code B1B20 RAM, Right Side Curtain Squib 1 Circuit Low?

Possible causes of this code include a faulty right side curtain airbag squib (igniter), wiring issues in the circuit, poor electrical connections, or a malfunctioning airbag control module.

3. How can I diagnose the issue related to OBDII code B1B20 RAM?

Diagnosing this code typically involves using a scan tool to retrieve the specific fault code, inspecting the wiring and connectors associated with the right side curtain airbag squib, and performing resistance tests on the circuit to pinpoint the exact cause of the low circuit condition.

4. Is it safe to drive with OBDII code B1B20 RAM active?

It is not recommended to drive the vehicle with an active airbag fault code like B1B20 RAM, as it may compromise the proper functioning of the airbag system during a collision. It is advised to address the issue promptly to ensure the safety of the occupants.

5. How can I repair OBDII code B1B20 RAM, Right Side Curtain Squib 1 Circuit Low?

Repairing this code often involves replacing the faulty right side curtain airbag squib, repairing any damaged wiring or connectors, and clearing the code with a scan tool. It is recommended to follow the manufacturer's repair procedures for a proper fix.

6. Can a DIY enthusiast fix OBDII code B1B20 RAM at home?

While some basic diagnosis steps can be performed by a DIY enthusiast, repairing airbag-related fault codes like B1B20 RAM may require specialized tools and knowledge. It is advisable to consult a professional technician or a qualified mechanic for proper diagnosis and repair.

7. Are there any safety precautions to consider when working on OBDII code B1B20 RAM?

When working on airbag-related systems, it is crucial to disconnect the vehicle's battery and wait for a specified amount of time to deactivate the airbag system. Additionally, following proper safety procedures outlined in the vehicle's service manual is essential to prevent accidental airbag deployment.

8. Can resetting the OBDII code B1B20 RAM clear the issue permanently?

Resetting the code may temporarily turn off the warning light, but if the underlying issue causing the B1B20 RAM code is not addressed, the code is likely to reappear. It is crucial to diagnose and repair the root cause to prevent future occurrences.

9. What are the potential risks of ignoring OBDII code B1B20 RAM?

Ignoring this code can lead to the non-functioning of the right side curtain airbag during a collision, compromising the safety of the vehicle occupants. It is essential to address airbag-related fault codes promptly to ensure the proper operation of the safety systems.

10. How much does it typically cost to repair OBDII code B1B20 RAM at a professional auto repair shop?

The cost of repairing OBDII code B1B20 RAM can vary depending on the exact cause of the issue, the labor rates of the repair shop, and the cost of any replacement parts needed. It is recommended to obtain quotes from reputable auto repair shops for an accurate estimate.