B1637 Toyota 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 Toyota 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.
Code B1637 Toyota Description
What are the Possible Causes of the DTC B1637 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 B1637 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 is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B1637 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 B1637 Toyota code?
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Need Help with the Code?
Get the B1637 Toyota code diagnosed by a professional: Find a repair shop in your area
Information for Specific Toyota Models
- B1637 2013 Toyota RAV4 — Lost Communication With Rear Airbag Sensor Left
- B1637 2014 Toyota RAV4 — Lost Communication With Rear Airbag Sensor Left
- B1637 2015 Toyota RAV4 — Lost Communication With Rear Airbag Sensor Left
- B1637 2016 Toyota RAV4 — Lost Communication With Rear Airbag Sensor Left
- B1637 2017 Toyota RAV4 — Lost Communication With Rear Airbag Sensor Left
- B1637 2018 Toyota RAV4 — Lost Communication With Rear Airbag Sensor Left
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 Toyota Code
1. What are the common symptoms of OBDII code B1637 Toyota (Lost Communication With Rear Airbag Sensor Left)?
- Common symptoms include the airbag warning light being illuminated on the dashboard, non-functioning rear airbag systems, and potential diagnostic trouble codes related to the left rear airbag sensor.
2. What are the possible causes of OBDII code B1637 Toyota?
- The code B1637 typically indicates a communication error between the vehicle's onboard diagnostic system and the left rear airbag sensor. Common causes include wiring issues, loose connections, or a faulty rear airbag sensor.
3. How can I diagnose the cause of OBDII code B1637 Toyota?
- Diagnosing this code usually involves checking the wiring connections between the vehicle's computer, the left rear airbag sensor, and the airbag control module. Using a diagnostic scanner to retrieve more specific information can help pinpoint the issue.
4. Can OBDII code B1637 Toyota be repaired at home?
- Depending on the cause of the communication error, some DIY enthusiasts may be able to address the issue at home by checking and potentially repairing wiring connections or replacing the left rear airbag sensor. However, if in doubt, it's recommended to seek professional assistance.
5. Is it safe to drive with OBDII code B1637 Toyota present?
- It is not recommended to drive with any airbag-related fault codes present, including B1637. Airbags are critical safety components, and driving with a malfunctioning airbag system can compromise occupant safety in the event of a collision.
6. How much does it typically cost to repair OBDII code B1637 Toyota?
- The cost of repairing OBDII code B1637 can vary depending on the underlying cause. Simple fixes like reconnecting wires may be inexpensive, while replacing a faulty rear airbag sensor or addressing more complex wiring issues could be more costly. It's best to consult a professional for an accurate estimate.
7. Can resetting the OBDII code B1637 Toyota clear the issue?
- Resetting the code may temporarily clear the error from the dashboard, but if the underlying issue causing the communication error persists, the code is likely to reappear. It's important to diagnose and address the root cause of the problem to prevent future occurrences.
8. What should I do if OBDII code B1637 Toyota keeps coming back after repair attempts?
- If the code keeps reappearing after attempted repairs, it's advisable to have a professional technician thoroughly inspect the airbag system and wiring to identify any underlying issues that may have been overlooked during previous repair attempts.
9. Are there any recalls or technical service bulletins related to OBDII code B1637 Toyota?
- It's recommended to check with Toyota's official website or contact a dealership to inquire about any recalls or technical service bulletins related to OBDII code B1637 specific to your vehicle's make, model, and year.
10. Can OBDII code B1637 Toyota affect the functionality of other vehicle systems?
- While the primary concern with OBDII code B1637 is related to the left rear airbag sensor, communication errors within the airbag system can sometimes impact the functionality of other safety systems. It's essential to address the issue promptly to ensure overall vehicle safety.
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