B1790 Toyota Code - Center Airbag Sensor Assembly Communication Circuit Malfunction
Quick Answer
The Center Airbag Sensor Assembly Communication Circuit consists of the Occupant Detection ECU and the Center Airbag Sensor Assembly. Common causes include Faulty Occupant Detection ECU, Occupant Detection ECU harness is open or shorted, Occupant Detection ECU 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
- B1790 Toyota indicates Center Airbag Sensor Assembly Communication Circuit Malfunction.
- Common causes
- Common causes include Faulty Occupant Detection ECU, Occupant Detection ECU harness is open or shorted, Occupant Detection ECU 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 B1790 Toyota Description
What are the Possible Causes of the DTC B1790 Toyota?
- Faulty Occupant Detection ECU
- Occupant Detection ECU harness is open or shorted
- Occupant Detection ECU circuit poor electrical connection
- Faulty Center Airbag Sensor Assembly
How to Fix the DTC B1790 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 B1790 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.
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Information for Specific Toyota Models
- B1790 2013 Toyota RAV4 — Center Airbag Sensor Assembly Communication Circuit Malfunction
- B1790 2014 Toyota RAV4 — Center Airbag Sensor Assembly Communication Circuit Malfunction
- B1790 2015 Toyota RAV4 — Center Airbag Sensor Assembly Communication Circuit Malfunction
- B1790 2016 Toyota RAV4 — Center Airbag Sensor Assembly Communication Circuit Malfunction
- B1790 2017 Toyota RAV4 — Center Airbag Sensor Assembly Communication Circuit Malfunction
- B1790 2018 Toyota RAV4 — Center Airbag Sensor Assembly Communication 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 B1790 Toyota Code
1. What are the common symptoms of OBDII code B1790 in a Toyota?
- Common symptoms include the airbag warning light illuminating on the dashboard and possible non-deployment of the airbags in case of an accident.
2. What can cause the Center Airbag Sensor Assembly Communication Circuit Malfunction in a Toyota?
- The most common causes of this OBDII code are wiring issues, faulty connections, or a malfunctioning center airbag sensor assembly.
3. How serious is the B1790 code in a Toyota?
- The B1790 code should be taken seriously as it indicates a malfunction in the airbag system, which can compromise the safety of the vehicle occupants in the event of a collision.
4. Can I continue driving my Toyota with the B1790 code present?
- It is not recommended to drive the vehicle with the B1790 code present, as it can lead to potential airbag system failure in case of an accident.
5. How can I diagnose and repair the Center Airbag Sensor Assembly Communication Circuit Malfunction in my Toyota?
- Diagnosing and repairing this issue typically involves checking the wiring and connections associated with the center airbag sensor assembly, as well as testing the sensor itself for any malfunctions.
6. Can I reset the B1790 code in my Toyota by simply clearing the fault codes?
- While clearing the fault codes may temporarily turn off the warning light, the underlying issue causing the B1790 code will persist unless properly diagnosed and repaired.
7. Are there any safety precautions I should take when working on the airbag system to address the B1790 code?
- It is highly recommended to disconnect the vehicle's battery and wait for at least 10 minutes before working on the airbag system to prevent accidental deployment.
8. How much does it typically cost to repair the B1790 code in a Toyota?
- The cost of repairing the B1790 code can vary depending on the root cause of the issue, but it may involve expenses for diagnostic time, parts replacement, and labor.
9. Can I fix the Center Airbag Sensor Assembly Communication Circuit Malfunction in my Toyota by myself, or should I seek professional help?
- While some DIY enthusiasts may attempt to diagnose and repair this issue, it is recommended to seek professional help, especially when working with the vehicle's airbag system for safety reasons.
10. Will fixing the B1790 code in my Toyota require reprogramming or recalibrating the airbag system?
- Depending on the repair performed, it may be necessary to reprogram or recalibrate the airbag system to ensure proper functionality and reset any stored error codes.
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