AutoCodes – Cadillac – B1147 Cadillac

B1147 Cadillac 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 Cadillac 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 1,166

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

What does this mean?

What are the Possible Causes of the DTC B1147 Cadillac?

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 Cadillac?

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 Cadillac 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 Cadillac code?

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

Need Help with the Code?

Get the B1147 Cadillac 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 Cadillac Code

1. What are the common symptoms of OBDII code B1147 in a Cadillac indicating a Driver Side Air Bag System Malfunction?

- Common symptoms include the airbag warning light staying illuminated on the dashboard and a message indicating a problem with the driver side airbag system.

2. What are the possible causes of OBDII code B1147 in a Cadillac related to the Driver Side Air Bag System Malfunction?

- Possible causes can include a faulty driver side airbag module, damaged wiring or connectors in the airbag system, or a malfunctioning airbag sensor.

3. How can I diagnose the OBDII code B1147 in a Cadillac to pinpoint the issue with the Driver Side Air Bag System Malfunction?

- A thorough diagnostic scan using an OBDII scanner can help identify the specific problem within the driver side airbag system, such as a failed component or wiring issue.

4. Is it safe to drive a Cadillac with the OBDII code B1147 indicating a Driver Side Air Bag System Malfunction?

- It is not recommended to drive the vehicle with an illuminated airbag warning light, as the driver side airbag may not deploy properly in the event of a collision.

5. What are some repair tips for addressing the OBDII code B1147 in a Cadillac with a Driver Side Air Bag System Malfunction?

- Repair tips may include checking and repairing any damaged wiring, replacing the driver side airbag module if necessary, and ensuring all connections are secure and functioning correctly.

6. Can resetting the OBDII code B1147 in a Cadillac resolve the Driver Side Air Bag System Malfunction issue?

- Resetting the code may temporarily turn off the warning light, but it will not fix the underlying problem causing the Driver Side Air Bag System Malfunction.

7. How much does it typically cost to repair the OBDII code B1147 in a Cadillac due to a Driver Side Air Bag System Malfunction?

- Repair costs can vary depending on the specific issue, but replacing a driver side airbag module or addressing wiring problems may range from a few hundred to a few thousand dollars.

8. Are there any safety precautions to keep in mind when working on the OBDII code B1147 in a Cadillac with a Driver Side Air Bag System Malfunction?

- It is crucial to disconnect the vehicle's battery and wait for the airbag system capacitors to discharge before working on any components related to the airbag system to prevent accidental deployment.

9. Will ignoring the OBDII code B1147 in a Cadillac with a Driver Side Air Bag System Malfunction cause any further damage or safety risks?

- Ignoring the issue can pose serious safety risks, as the driver side airbag may not deploy properly in a collision, potentially leading to increased injuries to the driver.

10. Is it possible to fix the OBDII code B1147 in a Cadillac with a Driver Side Air Bag System Malfunction without professional help?

- While some minor wiring issues may be resolved by DIY enthusiasts, diagnosing and repairing the driver side airbag system malfunction typically requires specialized tools and expertise, so professional help is recommended.