AutoCodes – Toyota – B1635 Toyota

B1635 Toyota Code - Rear Airbag Sensor Left Circuit Malfunction

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: B1635 Toyota indicates Rear Airbag Sensor Left Circuit Malfunction.
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 7,061

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
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code B1635 Toyota 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) B1635 is stored when a malfunction is detected in the Rear Airbag Sensor Left circuit.

OBDII Code B1635 Toyota - Rear Airbag Sensor Left Circuit Malfunction - AutoCodes.com — B1635 Toyota Code - Rear Airbag Sensor Left Circuit Malfunction

What does this mean?

What are the Possible Causes of the DTC B1635 Toyota?

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 B1635 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 does this mean?

Code Tech Notes

For some Toyota models, the B1635 is for the Rear Airbag Sensor Left Circuit Malfunction. Please check the Factory Service Manual for more information.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B1635 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 B1635 Toyota code?

Need more information on how to fix the B1635 Toyota code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1635 Toyota code diagnosed by a professional: Find a repair shop in your area

Information for Specific Toyota Models

B1635 2013 Toyota RAV4 — Rear Airbag Sensor Left Circuit Malfunction
B1635 2014 Toyota RAV4 — Rear Airbag Sensor Left Circuit Malfunction
B1635 2015 Toyota RAV4 — Rear Airbag Sensor Left Circuit Malfunction
B1635 2016 Toyota RAV4 — Rear Airbag Sensor Left Circuit Malfunction
B1635 2017 Toyota RAV4 — Rear Airbag Sensor Left Circuit Malfunction
B1635 2018 Toyota RAV4 — Rear Airbag Sensor Left Circuit Malfunction

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 B1635 Toyota Code

1. What are the common symptoms of OBDII code B1635 Toyota Rear Airbag Sensor Left Circuit Malfunction?

- Common symptoms may include the airbag warning light illuminating on the dashboard, a non-functioning left rear airbag, and potential issues with the airbag system's overall functionality.

2. What are the possible causes of the B1635 OBDII code in a Toyota vehicle?

- The code B1635 typically indicates a malfunction in the circuit of the left rear airbag sensor. Causes may include damaged wiring, a faulty sensor, a poor connection, or issues with the airbag control module.

3. How can I diagnose the B1635 code in my Toyota for a Rear Airbag Sensor Left Circuit Malfunction?

- Diagnosis involves using a scan tool to retrieve the specific trouble code, inspecting the wiring and connections related to the left rear airbag sensor, and testing the sensor itself for proper functionality.

4. Is it safe to drive my Toyota with the B1635 code present?

- It is not recommended to drive the vehicle with an active airbag system fault code like B1635, as it may compromise the effectiveness of the airbag system in case of an accident.

5. Can I reset the B1635 code in my Toyota without fixing the issue?

- While you can clear the code temporarily using a scan tool, the underlying issue causing the code will persist until it is properly diagnosed and repaired. It is essential to address the root cause of the problem.

6. How can I repair the B1635 code for a Rear Airbag Sensor Left Circuit Malfunction in my Toyota?

- Repair typically involves fixing any damaged wiring, replacing a faulty sensor, ensuring proper connections, or addressing issues with the airbag control module as needed.

7. Are there any DIY tips for addressing the B1635 code in my Toyota?

- DIY enthusiasts can start by carefully inspecting the wiring and connections related to the left rear airbag sensor, checking for any visible damage or corrosion that may be causing the malfunction.

8. Will fixing the B1635 code require professional assistance?

- Repairing the B1635 code usually requires a certain level of expertise due to the safety implications of working on the airbag system. It is advisable to seek professional help to ensure the issue is properly addressed.

9. How much does it typically cost to repair the B1635 code in a Toyota?

- The cost of repair can vary depending on the specific cause of the code, the extent of the damage, and whether any parts need to be replaced. It is recommended to obtain estimates from qualified technicians.

10. Can the B1635 code affect other components of the vehicle's airbag system?

- While the B1635 code specifically relates to the left rear airbag sensor circuit, it is essential to ensure that the entire airbag system is functioning properly, as faults in one component can impact the system as a whole.