B1635 Lexus 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 Lexus 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 Lexus Description
What are the Possible Causes of the DTC B1635 Lexus?
- 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 Lexus?
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.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B1635 Lexus 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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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 Lexus Code
1. What are the common symptoms of OBDII code B1635 in a Lexus related to the Rear Airbag Sensor Left Circuit Malfunction?
Common symptoms may include the airbag warning light staying illuminated on the dashboard, warning chimes, and potential issues with the airbag system's functionality.
2. What are the possible causes of the Rear Airbag Sensor Left Circuit Malfunction in a Lexus triggering OBDII code B1635?
Potential causes could range from a faulty rear airbag sensor, damaged wiring or connectors in the left circuit, to a problem with the airbag control module.
3. How can I diagnose the Rear Airbag Sensor Left Circuit Malfunction in my Lexus when OBDII code B1635 is detected?
Diagnosis typically involves using a diagnostic scan tool to read the trouble code, inspecting the rear airbag sensor and its wiring for any visible damage, and testing the circuit for continuity and proper functioning.
4. Is it safe to drive my Lexus with OBDII code B1635 indicating a Rear Airbag Sensor Left Circuit Malfunction?
It is not recommended to drive the vehicle with an active airbag fault code, as it could compromise the effectiveness of the airbag system in the event of a collision.
5. Can I reset the OBDII code B1635 related to the Rear Airbag Sensor Left Circuit Malfunction in my Lexus by disconnecting the battery?
While disconnecting the battery may clear the code temporarily, it is crucial to address the underlying issue causing the fault code to prevent potential safety risks.
6. How much does it typically cost to repair the Rear Airbag Sensor Left Circuit Malfunction in a Lexus triggering OBDII code B1635?
Repair costs can vary depending on the exact cause of the malfunction, but it may involve replacing the rear airbag sensor, repairing damaged wiring, or reprogramming the airbag control module.
7. Are there any safety precautions I should take when working on the airbag system to resolve OBDII code B1635 in my Lexus?
It is essential to disconnect the vehicle's battery and wait for at least 10-15 minutes before working on the airbag system to prevent accidental deployment and ensure safety.
8. Are there any common DIY repair tips for addressing the Rear Airbag Sensor Left Circuit Malfunction in a Lexus with OBDII code B1635?
DIY repair tips may include checking and securing the wiring connections, inspecting the sensor for damage, and consulting the vehicle's service manual for specific troubleshooting steps.
9. Can a mechanic without specialized training work on resolving the Rear Airbag Sensor Left Circuit Malfunction in a Lexus associated with OBDII code B1635?
It is recommended to seek assistance from a qualified mechanic or a dealership with experience in handling airbag system repairs to ensure proper diagnosis and repair of the issue.
10. How can I prevent the recurrence of OBDII code B1635 related to the Rear Airbag Sensor Left Circuit Malfunction in my Lexus after repair?
Regularly inspecting and maintaining the airbag system, avoiding physical damage to the sensors and wiring, and addressing any warning lights promptly can help prevent the code from reoccurring.
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