AutoCodes – Chevrolet – B1147 Chevrolet

B1147 Chevrolet Code - Driver Side Air Bag System Malfunction

Quick Answer

When the ignition switch is turned to RUN position, Side Impact Sensing Module (SISM) will perform tests to diagnose critical internal malfunctions. Common causes include Faulty Driver Side Air Bag, Driver Side Air Bag harness is open or shorted, Driver Side Air Bag 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: B1147 Chevrolet indicates Driver Side Air Bag System Malfunction.
Common causes: Common causes include Faulty Driver Side Air Bag, Driver Side Air Bag harness is open or shorted, Driver Side Air Bag 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 522

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 03, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1147 Chevrolet Description

When the ignition switch is turned to RUN position, Side Impact Sensing Module (SISM) will perform tests to diagnose critical internal malfunctions. The SISM then tests the deployment loop for an open, short to ground or ignition, high or low resistance, or reserve energy failure condition. SISM transmits a 300-millisecond, 50 percent duty cycle, pulse width modulated signal to restrain Sensing and Diagnostic Module (SDM) over-circuit 2107 to indicate normal operation and no malfunctions. SISM communicates that it is turning off (ignition OFF) by sending a 20 millisecond, 50 percent duty cycle, pulse width modulated signal. The Diagnostic Trouble Code (DTC) sets when SDM receives a pulse width signal other than specified for normal operation, or no signal. SISM performs tests during POWER-ON, CONTINUOUS MONITORING, and asynchronously.

OBDII Code B1147 Chevrolet - Driver Side Air Bag System Malfunction - AutoCodes.com — B1147 Chevrolet Code - Driver Side Air Bag System Malfunction

What does this mean?

What are the Possible Causes of the DTC B1147 Chevrolet?

Faulty Driver Side Air Bag
Driver Side Air Bag harness is open or shorted
Driver Side Air Bag circuit poor electrical connection
Faulty Side Impact Sensing Module (SISM)
Faulty Sensing and Diagnostic Module (SDM)

How to Fix the DTC B1147 Chevrolet?

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 B1147 Chevrolet 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 B1147 Chevrolet code?

Need more information on how to fix the B1147 Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1147 Chevrolet 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 B1147 Chevrolet Code

1. What are the common symptoms of OBDII code B1147 in a Chevrolet indicating a driver side airbag system malfunction?

The common symptoms include the airbag warning light on the dashboard staying illuminated, the horn not working, and the airbag system failing to deploy in case of an accident.

2. What are the possible causes of OBDII code B1147 in a Chevrolet related to the driver side airbag system malfunction?

Possible causes include a faulty airbag module, damaged clockspring, loose wiring connections, or a malfunctioning impact sensor.

3. How can I diagnose the OBDII code B1147 in a Chevrolet for a driver side airbag system malfunction?

A diagnostic scan tool can be used to retrieve the specific error code and identify the exact nature of the problem within the driver side airbag system.

4. What are some DIY repair tips for fixing OBDII code B1147 in a Chevrolet associated with a driver side airbag system malfunction?

DIY repair tips may include checking and securing all wiring connections, inspecting the clockspring for damage, and ensuring the airbag module is functioning correctly.

5. Is it safe to continue driving a Chevrolet with OBDII code B1147 indicating a driver side airbag system malfunction?

It is not recommended to drive the vehicle with this error code present, as the driver side airbag may not deploy in the event of a collision, potentially putting the driver at risk.

6. Can OBDII code B1147 in a Chevrolet be reset to clear the driver side airbag system malfunction?

Resetting the code may temporarily clear the warning light, but it will not fix the underlying issue causing the driver side airbag system malfunction. It is crucial to address the root cause of the problem.

7. How much does it typically cost to repair OBDII code B1147 in a Chevrolet related to a driver side airbag system malfunction?

The cost of repair can vary depending on the specific issue causing the malfunction, but it may range from a few hundred to over a thousand dollars, including parts and labor.

8. Are there any safety precautions to keep in mind when working on the driver side airbag system in a Chevrolet to address OBDII code B1147?

It is essential to disconnect the vehicle's battery and wait for a specific period to discharge any residual power before working on the airbag system to prevent accidental deployment and ensure safety.

9. How critical is it to address OBDII code B1147 in a Chevrolet linked to a driver side airbag system malfunction promptly?

Addressing this code promptly is crucial for ensuring the proper functioning of the driver side airbag system, which is a critical safety feature designed to protect the driver in the event of a collision.

10. Can a professional automotive technician help diagnose and repair OBDII code B1147 in a Chevrolet concerning a driver side airbag system malfunction?

Yes, seeking help from a professional automotive technician with experience in airbag system diagnostics and repairs is recommended to accurately diagnose and safely repair the issue related to the driver side airbag system malfunction.