B1637 Lexus Code - Lost Communication With Rear Airbag Sensor Left
Quick Answer
The B1637 diagnostic trouble code for Lexus vehicles indicates that there is a communication failure with the rear airbag sensor located on the left side of the vehicle. Common causes include Faulty rear airbag sensor, Damaged wiring or connectors leading to the sensor, Malfunctioning SRS control module. 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 Lexus indicates Lost Communication With Rear Airbag Sensor Left.
- Common causes
- Common causes include Faulty rear airbag sensor, Damaged wiring or connectors leading to the sensor, Malfunctioning SRS control module.
- 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 B1637 Lexus Description
The B1637 diagnostic trouble code for Lexus vehicles indicates that there is a communication failure with the rear airbag sensor located on the left side of the vehicle. The rear airbag sensor is a crucial component of the vehicle's supplemental restraint system (SRS), responsible for detecting impacts and deploying the airbags in the event of a collision. When communication with this sensor is lost, it can compromise the overall safety of the vehicle by potentially preventing the airbags from deploying when needed.
Common Causes of B1637 Lexus
- Faulty rear airbag sensor.
- Damaged wiring or connectors leading to the sensor.
- Malfunctioning SRS control module.
- Communication error within the vehicle's network system.
- Corrosion or moisture damage affecting the sensor's functionality.
Symptoms of B1637 Lexus
- SRS warning light illuminated on the dashboard.
- Inability to deploy rear airbags in the event of a collision.
- Loss of communication with the rear airbag sensor during diagnostic scans.
- Intermittent or sporadic functioning of the rear airbag system.
How to Fix B1637 Lexus
- Begin by conducting a thorough visual inspection of the rear airbag sensor, wiring, and connectors to check for any visible damage or corrosion.
- Use a diagnostic scan tool to retrieve the specific fault codes and pinpoint the exact cause of the communication failure.
- Test the rear airbag sensor's functionality using a multimeter to ensure it is sending and receiving signals correctly.
- Replace the faulty rear airbag sensor, damaged wiring, or connectors as needed to restore communication with the SRS control module.
- Clear the fault codes from the vehicle's memory and perform a test drive to verify that the issue has been resolved and the SRS warning light is no longer illuminated.
Cost to Fix B1637 Lexus
The typical repair costs for addressing a lost communication with the rear airbag sensor left code (B1637) can vary depending on the specific cause of the issue and the extent of the repairs needed. On average, the parts required for this repair, such as a new rear airbag sensor or wiring harness, can range from $100 to $300. Additionally, labor costs for diagnosing the problem, replacing the faulty components, and resetting the system can add another $150 to $300 to the total repair bill.
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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 B1637 Lexus Code
1. What are the common symptoms of OBDII code B1637 in a Lexus related to lost communication with the rear airbag sensor left?
The common symptoms include the airbag warning light illuminating on the dashboard, possible loss of communication with the rear airbag sensor left, and potential issues with the airbag system.
2. What are some possible causes of OBDII code B1637 in a Lexus?
Possible causes include a faulty rear airbag sensor left, damaged wiring or connectors in the airbag system, a blown fuse, or a malfunction in the airbag control module.
3. How can I diagnose the issue related to OBDII code B1637 in a Lexus?
Diagnosis can involve using an OBDII scanner to retrieve the specific trouble code, checking the wiring and connectors for any damage, testing the rear airbag sensor left for proper functionality, and inspecting the airbag control module.
4. What are some repair tips for addressing OBDII code B1637 in a Lexus?
Repair tips may include repairing or replacing damaged wiring or connectors, replacing the rear airbag sensor left if faulty, checking and replacing any blown fuses related to the airbag system, and reprogramming the airbag control module if necessary.
5. Is it safe to drive a Lexus with OBDII code B1637 related to the rear airbag sensor left communication issue?
It is not recommended to drive the vehicle with unresolved airbag system issues, as it can compromise the effectiveness of the airbags in the event of a collision. It is advised to address the problem promptly.
6. Can I reset the OBDII code B1637 in a Lexus myself?
While you can clear the trouble code using an OBDII scanner, it is essential to diagnose and address the underlying issue causing the code to prevent it from reoccurring.
7. How much does it typically cost to repair OBDII code B1637 in a Lexus?
The cost of repair can vary depending on the specific cause of the issue, the parts needed for replacement, and labor costs. It is recommended to consult a professional mechanic for an accurate estimate.
8. Can a DIY enthusiast fix OBDII code B1637 in a Lexus at home?
While some aspects of diagnosing and repairing the issue may be possible for DIY enthusiasts, dealing with the airbag system requires specialized knowledge and tools. It is advisable to seek professional help for such repairs.
9. How long does it take to repair OBDII code B1637 related to the rear airbag sensor left in a Lexus?
The repair time can vary depending on the complexity of the issue and the availability of parts. It is best to consult with a mechanic to get an estimate of the repair timeline.
10. Are there any recalls or service bulletins related to OBDII code B1637 in Lexus vehicles?
It is recommended to check with Lexus dealerships or online databases for any recalls or service bulletins related to the specific OBDII code B1637 and the rear airbag sensor left communication problem.
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