B1790 Scion 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 Scion 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 Scion Description
What are the Possible Causes of the DTC B1790 Scion?
- 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 Scion?
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 Scion 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 B1790 Scion Code
1. What does the OBDII code B1790 on a Scion indicate?
The B1790 code signifies a Center Airbag Sensor Assembly Communication Circuit Malfunction. This means there's a communication issue in the circuitry associated with the airbag sensor assembly.
2. What are common symptoms of code B1790 in a Scion?
Common symptoms include the airbag warning light illuminating on the dashboard, possible non-deployment of airbags in case of an accident, and error messages related to the airbag system.
3. What causes a B1790 code to appear on a Scion?
This code can be triggered by several issues including faulty wiring or connections in the airbag sensor assembly circuit, a malfunctioning center airbag sensor assembly, or interference caused by other electronic devices.
4. How do I fix the B1790 code on my Scion?
Repair actions might include checking and repairing any damaged wiring or connectors, replacing the center airbag sensor assembly, and ensuring no external devices are interfering with the system. Always disconnect the battery before attempting repairs to avoid triggering the airbag accidentally.
5. Is it safe to drive a Scion with the B1790 code?
Driving with this code is not recommended as it involves the safety system of the vehicle. The malfunction may prevent airbags from deploying in an accident, posing significant safety risks.
6. Can a B1790 code clear itself if the fault is corrected?
Yes, in some cases, if the fault is minor and corrected (like a loose connector), the code can clear itself after several driving cycles. However, it's advisable to use an OBDII scanner to reset the system and ensure the code is cleared.
7. What tools are needed to diagnose the B1790 code on a Scion?
Diagnosis usually requires an OBDII scanner to read the code and monitor live data, as well as tools for electrical testing such as a multimeter to check the integrity of wiring and connectors.
8. How urgent is it to address a B1790 code on a Scion?
It's quite urgent to address this issue due to its relation to vehicle safety systems. Immediate attention is recommended to ensure all components of the airbag system are functioning properly.
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