AutoCodes – Toyota – B1794 2018 Toyota RAV4

B1794 2018 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 2018 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 255

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 2018 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 2018 Toyota RAV4 - Open In Occupant Classification ECU Battery Positive Line - AutoCodes.com — B1794 2018 Toyota RAV4 Code - Open In Occupant Classification ECU Battery Positive Line

What does this mean?

What are the Possible Causes of the DTC B1794 2018 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 2018 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 2018 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 2018 Toyota RAV4 code?

Need more information on how to fix the B1794 2018 Toyota RAV4 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1794 2018 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 2018 Toyota RAV4 Code

1. What does OBDII code B1794 in a 2018 Toyota RAV4 indicate?

The code B1794 in a 2018 Toyota RAV4 indicates an open circuit in the Occupant Classification Electronic Control Unit (ECU) Battery Positive Line.

2. What are the common symptoms of an open in the Occupant Classification ECU Battery Positive Line?

Common symptoms include the airbag warning light staying illuminated on the dashboard, the passenger airbag being deactivated, and potential issues with the vehicle's occupant classification system.

3. What can cause an open in the Occupant Classification ECU Battery Positive Line in a 2018 Toyota RAV4?

Causes of this issue can include damaged wiring, loose connections, a faulty Occupant Classification ECU, or issues with the vehicle's battery positive line.

4. How can I diagnose the open in the Occupant Classification ECU Battery Positive Line in my 2018 Toyota RAV4?

Diagnosing this issue typically involves using a diagnostic scanner to retrieve the specific trouble code, inspecting the wiring and connections related to the Occupant Classification ECU, and testing the components for proper functioning.

5. Is it safe to drive my 2018 Toyota RAV4 with the B1794 code related to the Occupant Classification ECU?

It is not recommended to drive the vehicle with unresolved airbag system issues, as the passenger airbag may not deploy in the event of a crash. It is advisable to address the problem promptly.

6. Can I repair the open in the Occupant Classification ECU Battery Positive Line myself?

While diagnosing the issue may be possible for some DIY enthusiasts, repairing electrical faults like an open circuit in the Occupant Classification ECU Battery Positive Line often requires specialized knowledge and tools. It is advisable to seek professional help for proper repair.

7. How much does it cost to fix the B1794 code related to the Occupant Classification ECU in a 2018 Toyota RAV4?

The cost of repairing the B1794 code can vary depending on the specific cause of the issue, labor rates, and replacement part costs. It is recommended to obtain quotes from trusted mechanics or dealerships.

8. Can resetting the OBDII system clear the B1794 code on a 2018 Toyota RAV4?

Resetting the OBDII system may temporarily clear the code, but if the underlying issue causing the B1794 code is not resolved, the code is likely to reappear. It is essential to diagnose and fix the root cause of the problem.

9. How long does it typically take to repair an open in the Occupant Classification ECU Battery Positive Line in a 2018 Toyota RAV4?

The repair time can vary depending on the complexity of the issue, availability of parts, and the expertise of the technician. Generally, it may take a few hours to a day to diagnose and fix the problem.

10. Is the B1794 code related to the Occupant Classification ECU a common issue in 2018 Toyota RAV4 vehicles?

While the B1794 code related to the Occupant Classification ECU may not be extremely common, issues with the occupant classification system can occur in various vehicles, including the 2018 Toyota RAV4.