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

Quick Answer

The B1647 code for Toyota vehicles indicates that there is a communication failure with the side satellite sensor bus on the left side of the vehicle. Common causes include Faulty side satellite sensor, Wiring or connection issues between the sensor and ECM, ECM failure. 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 satellite sensor, Wiring or connection issues between the sensor and ECM, ECM failure.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 09, 2024
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Code B1647 Toyota Description

The B1647 code for Toyota vehicles indicates that there is a communication failure with the side satellite sensor bus on the left side of the vehicle. The side satellite sensors are crucial components of the vehicle's safety system, responsible for detecting impacts and deploying airbags in case of a collision. This code suggests that the Engine Control Module (ECM) or other relevant modules are unable to communicate with the left side satellite sensor bus, potentially impacting the vehicle's ability to deploy airbags accurately in an accident.

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

Common Causes of B1647 Toyota

  1. Faulty side satellite sensor
  2. Wiring or connection issues between the sensor and ECM
  3. ECM failure
  4. Corrosion or damage to the sensor or wiring
  5. Software glitch in the vehicle's control modules

Symptoms of B1647 Toyota

  1. Airbag warning light illuminated on the dashboard
  2. Inability to deploy side airbags in a side impact collision
  3. Erratic or non-responsive behavior from the side satellite sensor
  4. Loss of communication with other safety systems in the vehicle

How to Fix B1647 Toyota

  1. Perform a visual inspection of the side satellite sensor, wiring, and connections for any visible damage or corrosion.
  2. Use a diagnostic scanner to retrieve the specific fault codes and verify the communication failure with the left side satellite sensor bus.
  3. Test the side satellite sensor's functionality by conducting a system test or using a multimeter to measure its output.
  4. Replace the faulty side satellite sensor if necessary and repair any damaged wiring or connections.
  5. Clear the fault codes from the vehicle's memory using the diagnostic scanner and perform a test drive to ensure the issue has been resolved.

Cost to Fix B1647 Toyota

The cost of repairing a lost communication with the side satellite sensor bus left code can vary depending on the specific cause of the issue and the labor rates in your area. Typically, replacing a side satellite sensor can range from $200 to $500, including parts and labor. However, additional costs may apply if there are wiring or connection issues that need to be addressed. It is advisable to consult with a qualified mechanic or dealership to get an accurate estimate based on your vehicle's make and model.

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Information for Specific Toyota Models

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.

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