AutoCodes – Toyota – B1787 2014 Toyota RAV4

B1787 2014 Toyota RAV4 Code - Rear Occupant Classification Sensor Left Collision Detection

Quick Answer

The Diagnostic Trouble Code (DTC) B1787 is output when the Occupant Detection ECU receives a collision detection signal sent by the Rear Occupant Classification Sensor Left (LH) when an accident occurs. Common causes include Faulty Separate Type Rear Seat Cushion Spring Assembly Left (Rear Occupant Classification Sensor Left), Separate Type Rear Seat Cushion Spring Assembly Left harness is open or shorted, Separate Type Rear Seat Cushion Spring Assembly Left 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: B1787 2014 Toyota RAV4 indicates Rear Occupant Classification Sensor Left Collision Detection.
Common causes: Common causes include Faulty Separate Type Rear Seat Cushion Spring Assembly Left (Rear Occupant Classification Sensor Left), Separate Type Rear Seat Cushion Spring Assembly Left harness is open or shorted, Separate Type Rear Seat Cushion Spring Assembly Left 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 357

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 B1787 2014 Toyota RAV4 Description

The Diagnostic Trouble Code (DTC) B1787 is output when the Occupant Detection ECU receives a collision detection signal sent by the Rear Occupant Classification Sensor Left (LH) when an accident occurs. DTC B1787 is also stored when the separate type of front seat cushion spring assembly is subjected to a strong impact, even if an actual accident has not occurred. However, when the Occupant Detection ECU outputs a collision detection signal, even if the vehicle is not in a collision, DTC B1787 can be cleared by performing the zero point calibration and sensitivity check. Therefore, when DTC B1787 is output, first perform the zero point calibration and sensitivity check.

OBDII Code B1787 2014 Toyota RAV4 - Rear Occupant Classification Sensor Left Collision Detection - AutoCodes.com — B1787 2014 Toyota RAV4 Code - Rear Occupant Classification Sensor Left Collision Detection

What does this mean?

What are the Possible Causes of the DTC B1787 2014 Toyota RAV4?

Faulty Separate Type Rear Seat Cushion Spring Assembly Left (Rear Occupant Classification Sensor Left)
Separate Type Rear Seat Cushion Spring Assembly Left harness is open or shorted
Separate Type Rear Seat Cushion Spring Assembly Left circuit poor electrical connection
Faulty Occupant Detection ECU

How to Fix the DTC B1787 2014 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 B1787 2014 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 B1787 2014 Toyota RAV4 code?

Need more information on how to fix the B1787 2014 Toyota RAV4 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1787 2014 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 B1787 2014 Toyota RAV4 Code

1. What does OBDII code B1787 for the Rear Occupant Classification Sensor Left Collision Detection in a 2014 Toyota RAV4 indicate?

- This code indicates a fault with the rear occupant classification sensor's left collision detection system in the vehicle.

2. What are the common symptoms of OBDII code B1787 in a 2014 Toyota RAV4?

- Common symptoms include the airbag warning light illuminating on the dashboard and potential issues with the proper deployment of airbags in the event of a collision.

3. What are the possible causes of OBDII code B1787 in a 2014 Toyota RAV4?

- Possible causes include a malfunctioning rear occupant classification sensor, wiring issues, or a problem with the collision detection system itself.

4. How can I diagnose the issue related to OBDII code B1787 in my 2014 Toyota RAV4?

- Diagnosing the issue may require using a professional OBDII scanner to read the code and investigate the rear occupant classification sensor, wiring connections, and collision detection system for any faults.

5. Can I continue driving my 2014 Toyota RAV4 with OBDII code B1787 present?

- It is not recommended to continue driving the vehicle with this code present, as it may affect the proper functioning of the airbag system in the event of a collision.

6. How can I repair OBDII code B1787 in my 2014 Toyota RAV4?

- Repairing the issue may involve replacing the faulty rear occupant classification sensor, addressing any wiring issues, or recalibrating the collision detection system as needed.

7. Is it safe to reset the OBDII code B1787 in my 2014 Toyota RAV4 with a diagnostic tool?

- While resetting the code may temporarily turn off the warning light, it is crucial to diagnose and address the underlying issue to ensure the proper functioning of the airbag system.

8. Are there any recalls or technical service bulletins related to OBDII code B1787 for the 2014 Toyota RAV4?

- Check with your local Toyota dealership or visit the manufacturer's website to see if there are any recalls or technical service bulletins related to this specific OBDII code for your vehicle.

9. Can a DIY enthusiast fix OBDII code B1787 in a 2014 Toyota RAV4?

- Depending on your skill level and access to tools, you may be able to address simpler issues like checking wiring connections. However, more complex repairs may require professional assistance.

10. How much can I expect to pay to repair OBDII code B1787 in my 2014 Toyota RAV4?

- Repair costs can vary depending on the extent of the issue and the parts or components that need to be replaced, so it is advisable to get a diagnosis from a qualified mechanic for an accurate estimate.