B1635 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 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.
Code B1635 Description
What are the Possible Causes of the DTC B1635?
- 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?
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 B1635 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.
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Information for Specific Makes
- B1635 Lexus — Rear Airbag Sensor Left Circuit Malfunction
- B1635 Scion — Rear Airbag Sensor Left Circuit Malfunction
- B1635 Toyota — 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.
Frequently Asked Questions about B1635 Code
1. What are the common symptoms of OBDII code B1635 (Rear Airbag Sensor Left Circuit Malfunction)?
- Common symptoms include the airbag warning light being illuminated on the dashboard, potential non-deployment of the left rear airbag in a collision, and diagnostic trouble codes related to the rear airbag sensor circuit.
2. What are the possible causes of OBDII code B1635?
- The code B1635 can be caused by issues such as a faulty rear airbag sensor, damaged wiring or connectors in the left rear airbag circuit, or a malfunctioning airbag control module.
3. How can I diagnose the source of the Rear Airbag Sensor Left Circuit Malfunction?
- Diagnosing the issue typically involves using a scan tool to read the specific trouble codes, inspecting the wiring and connectors in the left rear airbag circuit, and testing the rear airbag sensor for proper operation.
4. Is it safe to drive with OBDII code B1635 active?
- It is not recommended to drive the vehicle with an active B1635 code as it indicates a malfunction in the left rear airbag sensor circuit, which could affect the proper deployment of the airbag in the event of a collision.
5. Can I reset the OBDII code B1635 without addressing the underlying issue?
- Resetting the code without fixing the root cause will only temporarily clear the warning light. The issue will persist, and the code will likely return until the underlying problem is resolved.
6. How can I repair OBDII code B1635 (Rear Airbag Sensor Left Circuit Malfunction)?
- Repairing the B1635 code may involve replacing the faulty rear airbag sensor, repairing damaged wiring or connectors, or addressing issues with the airbag control module, depending on the specific cause.
7. Are there any DIY tips for fixing the Rear Airbag Sensor Left Circuit Malfunction?
- DIYers with automotive repair experience can attempt to visually inspect the wiring and connectors for damage, ensure proper connections, and use a multimeter to test the rear airbag sensor's resistance and continuity.
8. Can a professional mechanic help diagnose and repair OBDII code B1635?
- Yes, a qualified mechanic can use specialized tools and expertise to accurately diagnose the issue causing the B1635 code and perform the necessary repairs to resolve the Rear Airbag Sensor Left Circuit Malfunction.
9. How much does it typically cost to fix OBDII code B1635?
- The cost of fixing the B1635 code can vary depending on the specific cause of the issue, the parts needed for repair, and labor costs. It's advisable to consult a mechanic for an accurate estimate.
10. Will fixing OBDII code B1635 affect the vehicle's airbag system's safety and functionality?
- Yes, addressing and repairing the Rear Airbag Sensor Left Circuit Malfunction indicated by code B1635 is crucial for ensuring the proper operation and safety of the vehicle's airbag system in the event of a collision.
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