AutoCodes – Scion – B1786 Scion

B1786 Scion Code - Front Occupant Classification Sensor Right Collision Detection

Quick Answer

The Diagnostic Trouble Code (DTC) B1786 is output when the Occupant Classification ECU receives a collision detection signal sent by the Front Occupant Classification Sensor Right (RH) when an accident occurs. Common causes include Faulty Front Seat RH (Front Occupant Classification Sensor (RH)), Front Seat RH harness is open or shorted, Front Seat RH 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: B1786 Scion indicates Front Occupant Classification Sensor Right Collision Detection.
Common causes: Common causes include Faulty Front Seat RH (Front Occupant Classification Sensor (RH)), Front Seat RH harness is open or shorted, Front Seat RH 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 1,233

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 16, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1786 Scion Description

The Diagnostic Trouble Code (DTC) B1786 is output when the Occupant Classification ECU receives a collision detection signal sent by the Front Occupant Classification Sensor Right (RH) when an accident occurs. DTC B1786 is also output when the Front Seat Assembly RH is subjected to a strong impact, even if an actual accident does not occur. However, when the Occupant Classification ECU outputs a collision detection signal, even if the vehicle is not in a collision, DTC B1786 can be cleared by performing the zero point calibration and sensitivity check. Therefore, when DTC B1786 is output, first perform the zero point calibration and sensitivity check.

OBDII Code B1786 Scion - Front Occupant Classification Sensor Right Collision Detection - AutoCodes.com — B1786 Scion Code - Front Occupant Classification Sensor Right Collision Detection

What does this mean?

What are the Possible Causes of the DTC B1786 Scion?

Faulty Front Seat RH (Front Occupant Classification Sensor (RH))
Front Seat RH harness is open or shorted
Front Seat RH circuit poor electrical connection
Faulty Occupant Classification ECU

How to Fix the DTC B1786 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 B1786 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 B1786 Scion code?

Need more information on how to fix the B1786 Scion code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1786 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 B1786 Scion Code

1. What are the common symptoms of OBDII code B1786 in a Scion related to the Front Occupant Classification Sensor Right Collision Detection?

- The common symptoms include the airbag warning light illuminating on the dashboard and potential issues with the passenger-side airbag deployment system.

2. What are the possible causes of OBDII code B1786 in a Scion?

- The code B1786 in a Scion may be triggered due to a malfunction or fault in the Front Occupant Classification Sensor Right Collision Detection system.

3. How can I diagnose the issue related to OBDII code B1786 in my Scion?

- Proper diagnosis involves using an OBDII scanner to retrieve the specific trouble code, inspecting the front occupant classification sensor, and checking for any loose connections or damaged components.

4. Can I repair OBDII code B1786 in my Scion at home?

- Repairing OBDII code B1786 may require advanced automotive knowledge and specialized tools. It is recommended to consult a professional mechanic for proper diagnosis and repair.

5. Is it safe to drive my Scion with OBDII code B1786 active?

- It is not recommended to drive the vehicle with an active OBDII code B1786 as it may affect the proper functioning of the airbag system, compromising passenger safety in the event of a collision.

6. How much does it typically cost to repair OBDII code B1786 in a Scion?

- The cost of repairing OBDII code B1786 in a Scion can vary depending on the extent of the issue, parts needed for replacement, and labor costs. It is advisable to get a repair estimate from a trusted mechanic.

7. Can resetting the OBDII system clear the B1786 code in my Scion?

- Resetting the OBDII system may temporarily clear the B1786 code, but it is crucial to address the underlying issue causing the code to prevent it from reoccurring.

8. Are there any recalls or technical service bulletins related to OBDII code B1786 in Scion vehicles?

- It is recommended to check with the manufacturer or authorized dealerships for any recalls or technical service bulletins related to OBDII code B1786 in Scion vehicles for potential warranty coverage or repair assistance.

9. How long does it take to repair OBDII code B1786 in a Scion?

- The repair time for OBDII code B1786 in a Scion can vary depending on the complexity of the issue and availability of parts. It is advisable to consult with a mechanic for a more accurate estimate of repair time.

10. Can a faulty Front Occupant Classification Sensor Right Collision Detection system affect other safety features in my Scion?

- Yes, a malfunctioning Front Occupant Classification Sensor Right Collision Detection system can potentially affect the proper functioning of other safety features, such as seat belt pretensioners and side airbags, in a Scion.