B1109 Infiniti Code - Diagnosis Sensor Unit
Quick Answer
The Air Bag Diagnosis Sensor Unit detects the whole SRS electrical system and displays the malfunction either by illuminating or blinking the air bag warning lamp in the combination meter. Common causes include Faulty Diagnosis Sensor Unit, Diagnosis Sensor Unit harness is open or shorted, Diagnosis Sensor Unit 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
- B1109 Infiniti indicates Diagnosis Sensor Unit.
- Common causes
- Common causes include Faulty Diagnosis Sensor Unit, Diagnosis Sensor Unit harness is open or shorted, Diagnosis Sensor Unit 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 B1109 Infiniti Description
The Air Bag Diagnosis Sensor Unit contains the “G†sensors for both frontal and side collisions and spare battery function in case of main battery damaged in a collision.
What are the Possible Causes of the DTC B1109 Infiniti?
- Faulty Diagnosis Sensor Unit
- Diagnosis Sensor Unit harness is open or shorted
- Diagnosis Sensor Unit circuit poor electrical connection
How to Fix the DTC B1109 Infiniti?
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 B1109 Infiniti 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 B1109 Infiniti code?
Need more information on how to fix the B1109 Infiniti code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the B1109 Infiniti 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.
Frequently Asked Questions about B1109 Infiniti Code
1. What are the common symptoms of OBDII code B1109 in an Infiniti related to the Diagnosis Sensor Unit?
- Common symptoms may include issues with the airbag system, such as the airbag warning light staying illuminated on the dashboard.
2. What are some possible causes of OBDII code B1109 related to the Diagnosis Sensor Unit in an Infiniti?
- Possible causes can include a malfunctioning sensor unit, wiring issues, or a faulty connection within the airbag system.
3. How can I diagnose OBDII code B1109 in my Infiniti related to the Diagnosis Sensor Unit?
- Diagnosis typically involves using an OBDII scanner to retrieve the specific fault code and then inspecting the sensor unit, wiring, and connections for any visible damage or issues.
4. Are there any DIY repair tips for fixing OBDII code B1109 related to the Diagnosis Sensor Unit in an Infiniti?
- DIY repair tips may include checking and securing any loose connections, inspecting for damaged wiring, and ensuring the sensor unit is properly seated and functioning correctly.
5. Can OBDII code B1109 related to the Diagnosis Sensor Unit in an Infiniti be reset without fixing the underlying issue?
- While you can clear the code with an OBDII scanner, it is important to address the root cause of the problem to prevent the code from reoccurring.
6. Is it safe to drive my Infiniti with OBDII code B1109 related to the Diagnosis Sensor Unit?
- It is not recommended to drive the vehicle with this code present, as it indicates a potential issue with the airbag system, which is crucial for safety in the event of a collision.
7. How much does it typically cost to repair OBDII code B1109 related to the Diagnosis Sensor Unit in an Infiniti?
- Repair costs can vary depending on the specific cause of the issue, but they may range from a few hundred to over a thousand dollars, including parts and labor.
8. Can a mechanic easily fix OBDII code B1109 related to the Diagnosis Sensor Unit in an Infiniti?
- A qualified mechanic with experience in diagnosing and repairing airbag system issues should be able to address the problem efficiently and effectively.
9. Will fixing OBDII code B1109 related to the Diagnosis Sensor Unit in my Infiniti require replacement parts?
- Depending on the cause of the issue, replacement parts such as a new sensor unit or wiring harness may be necessary to resolve the problem.
10. How can I prevent OBDII code B1109 related to the Diagnosis Sensor Unit from occurring in my Infiniti in the future?
- Regularly inspecting and maintaining the airbag system, including the sensor unit and wiring, can help prevent this code from reoccurring.
Discuss the causes and fixes for B1109 Infiniti OBDII Code
Code B1109 Infiniti comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
