AutoCodes – Toyota – B1647 Toyota

B1647 Toyota Code - Lost Communication With Side Satellite Sensor Bus Left

Quick Answer

The Side Collision Sensor Left (LH) circuit (to determine deployment of the Front Seat Side Airbag Assembly LH and Curtain Shield Airbag Assembly LH) is composed of the Center Airbag Sensor Assembly, Side Airbag Sensor LH, and Rear Airbag Sensor LH. Common causes include Faulty Side Airbag Sensor Left (LH), Faulty Rear Airbag Sensor Left (LH), Side Airbag Sensor Left harness is open or shorted. 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: B1647 Toyota indicates Lost Communication With Side Satellite Sensor Bus Left.
Common causes: Common causes include Faulty Side Airbag Sensor Left (LH), Faulty Rear Airbag Sensor Left (LH), Side Airbag Sensor Left harness is open or shorted.
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 3,027

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 Oct 10, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1647 Toyota Description

The Side Collision Sensor Left (LH) circuit (to determine deployment of the Front Seat Side Airbag Assembly LH and Curtain Shield Airbag Assembly LH) is composed of the Center Airbag Sensor Assembly, Side Airbag Sensor LH, and Rear Airbag Sensor LH. The Side Airbag Sensor LH and Rear Airbag Sensor LH detect impacts to the vehicle and send signals to the Center Airbag Sensor Assembly to determine if the airbag should be deployed. The Diagnostic Trouble Code (DTC) is stored when a malfunction is detected in the Side Collision Sensor LH circuit (to determine deployment of the Front Seat Side Airbag Assembly LH and Curtain Shield Airbag Assembly LH).

OBDII Code B1647 Toyota - Lost Communication With Side Satellite Sensor Bus Left - AutoCodes.com — B1647 Toyota Code - Lost Communication With Side Satellite Sensor Bus Left

What does this mean?

What are the Possible Causes of the DTC B1647 Toyota?

Faulty Side Airbag Sensor Left (LH)
Faulty Rear Airbag Sensor Left (LH)
Side Airbag Sensor Left harness is open or shorted
Side Airbag Sensor Left circuit poor electrical connection
Faulty Center Airbag Sensor Assembly

How to Fix the DTC B1647 Toyota?

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 B1647 Toyota 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 B1647 Toyota code?

Need more information on how to fix the B1647 Toyota code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1647 Toyota code diagnosed by a professional: Find a repair shop in your area

Information for Specific Toyota Models

B1647 2013 Toyota RAV4 — Lost Communication With Side Satellite Sensor Bus Left
B1647 2014 Toyota RAV4 — Lost Communication With Side Satellite Sensor Bus Left
B1647 2015 Toyota RAV4 — Lost Communication With Side Satellite Sensor Bus Left
B1647 2016 Toyota RAV4 — Lost Communication With Side Satellite Sensor Bus Left
B1647 2017 Toyota RAV4 — Lost Communication With Side Satellite Sensor Bus Left
B1647 2018 Toyota RAV4 — Lost Communication With Side Satellite Sensor Bus Left

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 B1647 Toyota Code

1. What are the common symptoms of OBDII code B1647 Toyota (Lost Communication With Side Satellite Sensor Bus Left)?

- Common symptoms include the illumination of the airbag warning light on the dashboard and potential loss of communication with the left side satellite sensor.

2. What are the possible causes of OBDII code B1647 Toyota?

- Possible causes include damaged wiring or connectors, a faulty side satellite sensor on the left side, or issues with the airbag control module.

3. How can I diagnose the issue related to OBDII code B1647 Toyota?

- Diagnosis typically involves checking the wiring and connectors for damage, testing the left side satellite sensor, and using a diagnostic scan tool to communicate with the airbag control module.

4. Is it safe to drive with OBDII code B1647 Toyota active?

- It is not recommended to drive with this code active, as it indicates a potential issue with the airbag system that could affect its functionality in the event of a crash.

5. Can I reset OBDII code B1647 Toyota myself?

- While you can clear the code with a diagnostic scan tool, it is important to address the underlying issue causing the code to prevent it from reoccurring.

6. How much does it cost to repair OBDII code B1647 Toyota?

- The cost of repair can vary depending on the exact cause of the code, but it may involve replacing damaged wiring, connectors, or components such as the side satellite sensor.

7. Are there any DIY repair tips for OBDII code B1647 Toyota?

- DIY repair tips may include checking and repairing damaged wiring, ensuring connectors are properly connected, and testing components with a multimeter to identify faults.

8. Can weather conditions affect the occurrence of OBDII code B1647 Toyota?

- Extreme weather conditions or moisture intrusion can potentially affect the communication between the side satellite sensor and the airbag control module, leading to the code being triggered.

9. Will OBDII code B1647 Toyota cause the airbags to deploy unexpectedly?

- No, this code typically indicates a communication issue rather than a deployment issue. However, it is still important to address the problem to ensure the airbags function correctly in the event of a collision.

10. How long does it typically take to repair OBDII code B1647 Toyota?

- Repair times can vary depending on the exact cause of the code and the availability of parts, but it may take a few hours to a day to diagnose and repair the issue successfully.