AutoCodes – Scion – B1794 Scion

B1794 Scion Code - Open In Occupant Classification ECU Battery Positive Line

Quick Answer

This circuit consists of the Occupant Classification ECU and the power source circuit (battery, fuse, wire harness). 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: B1794 Scion indicates Open In Occupant Classification ECU Battery Positive Line.
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.

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Code Popularity 1,584

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Oct 20, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1794 Scion Description

This circuit consists of the Occupant Classification ECU and the power source circuit (battery, fuse, wire harness). The Diagnostic Trouble Code (DTC) B1794 is recorded when a malfunction is detected in the Occupant Classification ECU or the power source circuit. When DTC B1794 is output after switching the ignition switch LOCK-ON-LOCK 50 times in a row when a malfunction occurs in the power circuit for the occupant classification system, the DTC is output again when a malfunction is detected even once after being cleared, unless the normal system code is input.

OBDII Code B1794 Scion - Open In Occupant Classification ECU Battery Positive Line - AutoCodes.com — B1794 Scion Code - Open In Occupant Classification ECU Battery Positive Line

What does this mean?

What are the Possible Causes of the DTC B1794 Scion?

Faulty Occupant Detection ECU
Occupant Detection ECU harness is open or shorted
Occupant Detection ECU circuit poor electrical connection

How to Fix the DTC B1794 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 B1794 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.

Need more information about the B1794 Scion code?

Need more information on how to fix the B1794 Scion code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1794 Scion code diagnosed by a professional: Find a repair shop in your area

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.

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B1794 Scion Code

1. What are the common symptoms of OBDII code B1794 in a Scion related to an open in the Occupant Classification ECU battery positive line?

- Common symptoms may include the airbag warning light illuminating on the dashboard and potential issues with the vehicle's airbag system.

2. What causes the OBDII code B1794 in a Scion to trigger an open in the Occupant Classification ECU battery positive line?

- The code B1794 is typically triggered by a break or fault in the wiring of the Occupant Classification ECU battery positive line.

3. How can I diagnose the issue triggering OBDII code B1794 in my Scion?

- To diagnose the issue, it is recommended to perform a thorough visual inspection of the wiring associated with the Occupant Classification ECU battery positive line and check for any breaks or damage.

4. What are some repair tips for fixing the open in the Occupant Classification ECU battery positive line causing OBDII code B1794 in a Scion?

- Repair tips may include repairing or replacing the damaged wiring, ensuring proper connections, and clearing the error code with an OBDII scanner after the repair is completed.

5. Is it safe to continue driving my Scion with OBDII code B1794 related to an open in the Occupant Classification ECU battery positive line?

- It is not recommended to drive the vehicle with unresolved airbag system issues. It is advised to address the problem promptly to ensure the safety features are functioning correctly.

6. Can the OBDII code B1794 in a Scion be reset without fixing the underlying issue with the Occupant Classification ECU battery positive line?

- While the code can be cleared with an OBDII scanner, it is crucial to address the root cause of the problem to prevent potential safety hazards and ensure the airbag system functions properly.

7. Are there any recalls or technical service bulletins related to OBDII code B1794 in Scion vehicles?

- It is recommended to check with a Scion dealership or the manufacturer to inquire about any recalls or technical service bulletins related to the specific OBDII code B1794 and associated issues.

8. How much does it typically cost to repair the open in the Occupant Classification ECU battery positive line triggering OBDII code B1794 in a Scion?

- The cost of repair can vary depending on the extent of the damage and labor rates. It is advisable to consult with a trusted mechanic or dealership for an accurate estimate.

9. Can I fix the open in the Occupant Classification ECU battery positive line triggering OBDII code B1794 in my Scion myself, or should I seek professional help?

- While some DIY enthusiasts may attempt to address the issue, it is recommended to seek professional help, especially when dealing with airbag system components to ensure proper repair and safety compliance.

10. How long does it take to repair the open in the Occupant Classification ECU battery positive line causing OBDII code B1794 in a Scion?

- The repair time can vary based on the complexity of the wiring issue and accessibility of components. It is advisable to consult with a mechanic for a more accurate timeframe.