AutoCodes – Toyota – B1637 2016 Toyota RAV4

B1637 2016 Toyota RAV4 Code - Lost Communication With Rear Airbag Sensor Left

Quick Answer

The Side Airbag Sensor Left (LH) or Rear Airbag Sensor Right (RH) consists of the Diagnostic Circuit, the Lateral Deceleration Sensor, etc. Common causes include Faulty Rear Airbag Sensor Left (LH), Rear Airbag Sensor Left harness is open or shorted, Rear Airbag Sensor Left 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: B1637 2016 Toyota RAV4 indicates Lost Communication With Rear Airbag Sensor Left.
Common causes: Common causes include Faulty Rear Airbag Sensor Left (LH), Rear Airbag Sensor Left harness is open or shorted, Rear Airbag Sensor Left 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 221

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 B1637 2016 Toyota RAV4 Description

The Side Airbag Sensor Left (LH) or Rear Airbag Sensor Right (RH) consists of the Diagnostic Circuit, the Lateral Deceleration Sensor, etc. If the Center Airbag Sensor receives signals from the Lateral Deceleration Sensor, it determines whether the Supplemental Restraint System (SRS) should be activated. The Diagnostic Trouble Code (DTC) B1637 is stored when a malfunction is detected in the Rear Airbag Sensor Left circuit.

OBDII Code B1637 2016 Toyota RAV4 - Lost Communication With Rear Airbag Sensor Left - AutoCodes.com — B1637 2016 Toyota RAV4 Code - Lost Communication With Rear Airbag Sensor Left

What does this mean?

What are the Possible Causes of the DTC B1637 2016 Toyota RAV4?

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

How to Fix the DTC B1637 2016 Toyota RAV4?

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 B1637 2016 Toyota RAV4 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 B1637 2016 Toyota RAV4 code?

Need more information on how to fix the B1637 2016 Toyota RAV4 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1637 2016 Toyota RAV4 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 B1637 2016 Toyota RAV4 Code

1. What are the common symptoms of OBDII code B1637 in a 2016 Toyota RAV4?

The common symptoms of OBDII code B1637 "Lost Communication With Rear Airbag Sensor Left" in a 2016 Toyota RAV4 may include the airbag warning light illuminating on the dashboard.

2. What could cause the OBDII code B1637 to appear in a 2016 Toyota RAV4?

The OBDII code B1637 in a 2016 Toyota RAV4 is typically triggered by a communication issue between the vehicle's onboard diagnostic system and the rear airbag sensor on the left side.

3. How serious is the OBDII code B1637 in a 2016 Toyota RAV4?

The OBDII code B1637 "Lost Communication With Rear Airbag Sensor Left" in a 2016 Toyota RAV4 should be addressed promptly as it relates to the communication with a critical safety system like the airbag sensor.

4. What are some DIY repair tips for addressing OBDII code B1637 in a 2016 Toyota RAV4?

DIY repair tips for OBDII code B1637 in a 2016 Toyota RAV4 may include checking the wiring connections to the rear airbag sensor, ensuring they are secure and free of damage or corrosion.

5. Can driving with the OBDII code B1637 present in a 2016 Toyota RAV4 be dangerous?

Driving with the OBDII code B1637 indicating a communication issue with the rear airbag sensor in a 2016 Toyota RAV4 could potentially compromise the proper functioning of the airbag system in the event of a collision.

6. Is it safe to reset the OBDII code B1637 in a 2016 Toyota RAV4 without addressing the underlying issue?

Resetting the OBDII code B1637 in a 2016 Toyota RAV4 without addressing the underlying communication problem with the rear airbag sensor may temporarily turn off the warning light but will not solve the issue and could pose a safety risk.

7. How can a professional mechanic diagnose OBDII code B1637 in a 2016 Toyota RAV4?

A professional mechanic can diagnose OBDII code B1637 in a 2016 Toyota RAV4 using specialized diagnostic equipment to check the communication signals between the onboard system and the rear airbag sensor.

8. Are there any recalls or service bulletins related to OBDII code B1637 in a 2016 Toyota RAV4?

It's recommended to check with Toyota dealerships or online resources for any recalls or service bulletins related to OBDII code B1637 "Lost Communication With Rear Airbag Sensor Left" in a 2016 Toyota RAV4.

9. How much does it typically cost to repair OBDII code B1637 in a 2016 Toyota RAV4?

The cost of repairing OBDII code B1637 in a 2016 Toyota RAV4 can vary depending on the exact cause of the communication issue, but it may involve inspecting and repairing wiring connections or replacing the rear airbag sensor.

10. Can the OBDII code B1637 in a 2016 Toyota RAV4 be a false alarm?

While it's possible for OBDII codes to be triggered by intermittent issues, it's important not to ignore code B1637 "Lost Communication With Rear Airbag Sensor Left" in a 2016 Toyota RAV4 without proper diagnosis and resolution to ensure the safety systems function correctly.