AutoCodes – Toyota – B1794 2015 Toyota RAV4

B1794 2015 Toyota RAV4 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 2015 Toyota RAV4 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 2,607

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 2015 Toyota RAV4 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 2015 Toyota RAV4 - Open In Occupant Classification ECU Battery Positive Line - AutoCodes.com — B1794 2015 Toyota RAV4 Code - Open In Occupant Classification ECU Battery Positive Line

What does this mean?

What are the Possible Causes of the DTC B1794 2015 Toyota RAV4?

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 2015 Toyota RAV4?

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 2015 Toyota RAV4 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 2015 Toyota RAV4 code?

Need more information on how to fix the B1794 2015 Toyota RAV4 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1794 2015 Toyota RAV4 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 2015 Toyota RAV4 Code

1. What are the common symptoms of OBDII code B1794 (Open In Occupant Classification ECU Battery Positive Line) in a 2015 Toyota RAV4?

The common symptoms of this code may include issues with the airbag system, malfunctioning seat belt warning lights, and in some cases, the airbags may not deploy in the event of an accident.

2. What can cause the OBDII code B1794 to appear in a 2015 Toyota RAV4?

This code usually indicates an open circuit in the occupant classification ECU battery positive line. The issue may be due to damaged wiring, a faulty occupant classification ECU, or loose connections.

3. How can I diagnose the cause of OBDII code B1794 in my 2015 Toyota RAV4?

To diagnose the issue, you may need to perform a thorough inspection of the wiring harness, check the connections to the occupant classification ECU, and use a multimeter to test for continuity in the battery positive line.

4. Can I drive my 2015 Toyota RAV4 with OBDII code B1794 present?

It is not recommended to drive the vehicle with this code active, as it may compromise the proper functioning of the airbag system, potentially putting you at risk in case of an accident.

5. How can I repair OBDII code B1794 in my 2015 Toyota RAV4?

Repairing this code typically involves identifying and fixing the open circuit in the occupant classification ECU battery positive line. This may require repairing or replacing damaged wiring, securing loose connections, or replacing the occupant classification ECU if necessary.

6. Is it safe to reset the OBDII code B1794 in my 2015 Toyota RAV4 without fixing the underlying issue?

Resetting the code without addressing the root cause may temporarily clear the warning light, but it will not fix the underlying problem. It is essential to diagnose and repair the issue to ensure the proper operation of the airbag system.

7. Can a DIY enthusiast fix OBDII code B1794 in a 2015 Toyota RAV4?

Depending on your skill level and experience with automotive repairs, you may be able to diagnose and repair this code yourself. However, if you are unsure or unfamiliar with airbag systems, it is recommended to seek professional assistance.

8. How much does it cost to repair OBDII code B1794 in a 2015 Toyota RAV4?

The cost of repairing this code can vary depending on the specific underlying issue, parts needed for replacement, and labor costs. It is advisable to obtain quotes from reputable mechanics or dealerships for an accurate estimate.

9. Will fixing OBDII code B1794 in my 2015 Toyota RAV4 require resetting the airbag system?

Once the underlying issue causing the code is fixed, the airbag system may need to be reset to clear the code and ensure proper functionality. This typically requires specialized equipment and knowledge, so it is recommended to have the reset performed by a professional.

10. How can I prevent OBDII code B1794 from reoccurring in my 2015 Toyota RAV4?

To prevent this code from reoccurring, it is essential to ensure proper maintenance of the airbag system, regularly inspect wiring harnesses for damage, and address any warning signs promptly to avoid potential issues.